Mkyong 中文博客翻译（五十二）

企业开发 2024-11-04 21:51:24 阅读次数: 0

原文：Mkyong

协议：CC BY-NC-SA 4.0

Spring Boot——Jetty 作为嵌入式服务器

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-jetty-as-embedded-server/

默认情况下，Spring Boot 使用 Tomcat 作为默认的嵌入式服务器，要将其更改为 Jetty，只需排除 Tomcat 并包含 Jetty，如下所示:

1.弹簧靴起动器网

pom.xml

 <dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-web</artifactId>
		<exclusions>
			<exclusion>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-starter-tomcat</artifactId>
			</exclusion>
		</exclusions>
	</dependency>

	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-jetty</artifactId>
	</dependency>

2.百里香叶

pom.xml

 <dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-thymeleaf</artifactId>
		<exclusions>
			<exclusion>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-starter-tomcat</artifactId>
			</exclusion>
		</exclusions>
	</dependency>

	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-jetty</artifactId>
	</dependency>

查看依赖关系

 $ mvn dependency:tree

[INFO] org.springframework.boot:spring-boot-web-thymeleaf:jar:1.0
[INFO] +- org.springframework.boot:spring-boot-starter-thymeleaf:jar:1.4.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter:jar:1.4.2.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:1.4.2.RELEASE:compile
[INFO] |  |  |  +- ch.qos.logback:logback-classic:jar:1.1.7:compile
[INFO] |  |  |  |  \- ch.qos.logback:logback-core:jar:1.1.7:compile
[INFO] |  |  |  +- org.slf4j:jcl-over-slf4j:jar:1.7.21:compile
[INFO] |  |  |  +- org.slf4j:jul-to-slf4j:jar:1.7.21:compile
[INFO] |  |  |  \- org.slf4j:log4j-over-slf4j:jar:1.7.21:compile
[INFO] |  |  +- org.springframework:spring-core:jar:4.3.4.RELEASE:compile
[INFO] |  |  \- org.yaml:snakeyaml:jar:1.17:runtime
[INFO] |  +- org.springframework.boot:spring-boot-starter-web:jar:1.4.2.RELEASE:compile
[INFO] |  |  +- org.hibernate:hibernate-validator:jar:5.2.4.Final:compile
[INFO] |  |  |  +- javax.validation:validation-api:jar:1.1.0.Final:compile
[INFO] |  |  |  +- org.jboss.logging:jboss-logging:jar:3.3.0.Final:compile
[INFO] |  |  |  \- com.fasterxml:classmate:jar:1.3.3:compile
[INFO] |  |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.8.4:compile
[INFO] |  |  |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.8.4:compile
[INFO] |  |  |  \- com.fasterxml.jackson.core:jackson-core:jar:2.8.4:compile
[INFO] |  |  +- org.springframework:spring-web:jar:4.3.4.RELEASE:compile
[INFO] |  |  |  +- org.springframework:spring-aop:jar:4.3.4.RELEASE:compile
[INFO] |  |  |  \- org.springframework:spring-beans:jar:4.3.4.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-webmvc:jar:4.3.4.RELEASE:compile
[INFO] |  |     \- org.springframework:spring-expression:jar:4.3.4.RELEASE:compile
[INFO] |  +- org.thymeleaf:thymeleaf-spring4:jar:2.1.5.RELEASE:compile
[INFO] |  |  +- org.thymeleaf:thymeleaf:jar:2.1.5.RELEASE:compile
[INFO] |  |  |  +- ognl:ognl:jar:3.0.8:compile
[INFO] |  |  |  +- org.javassist:javassist:jar:3.20.0-GA:compile
[INFO] |  |  |  \- org.unbescape:unbescape:jar:1.1.0.RELEASE:compile
[INFO] |  |  \- org.slf4j:slf4j-api:jar:1.7.21:compile
[INFO] |  \- nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect:jar:1.4.0:compile
[INFO] |     \- org.codehaus.groovy:groovy:jar:2.4.7:compile
[INFO] +- org.springframework.boot:spring-boot-starter-jetty:jar:1.4.2.RELEASE:compile
[INFO] |  +- org.eclipse.jetty:jetty-servlets:jar:9.3.14.v20161028:compile
[INFO] |  |  +- org.eclipse.jetty:jetty-continuation:jar:9.3.14.v20161028:compile
[INFO] |  |  +- org.eclipse.jetty:jetty-http:jar:9.3.14.v20161028:compile
[INFO] |  |  +- org.eclipse.jetty:jetty-util:jar:9.3.14.v20161028:compile
[INFO] |  |  \- org.eclipse.jetty:jetty-io:jar:9.3.14.v20161028:compile
[INFO] |  +- org.eclipse.jetty:jetty-webapp:jar:9.3.14.v20161028:compile
[INFO] |  |  +- org.eclipse.jetty:jetty-xml:jar:9.3.14.v20161028:compile
[INFO] |  |  \- org.eclipse.jetty:jetty-servlet:jar:9.3.14.v20161028:compile
[INFO] |  |     \- org.eclipse.jetty:jetty-security:jar:9.3.14.v20161028:compile
[INFO] |  |        \- org.eclipse.jetty:jetty-server:jar:9.3.14.v20161028:compile
[INFO] |  +- org.eclipse.jetty.websocket:websocket-server:jar:9.3.14.v20161028:compile
[INFO] |  |  +- org.eclipse.jetty.websocket:websocket-common:jar:9.3.14.v20161028:compile
[INFO] |  |  |  \- org.eclipse.jetty.websocket:websocket-api:jar:9.3.14.v20161028:compile
[INFO] |  |  +- org.eclipse.jetty.websocket:websocket-client:jar:9.3.14.v20161028:compile
[INFO] |  |  \- org.eclipse.jetty.websocket:websocket-servlet:jar:9.3.14.v20161028:compile
[INFO] |  |     \- javax.servlet:javax.servlet-api:jar:3.1.0:compile
[INFO] |  +- org.eclipse.jetty.websocket:javax-websocket-server-impl:jar:9.3.14.v20161028:compile
[INFO] |  |  +- org.eclipse.jetty:jetty-annotations:jar:9.3.14.v20161028:compile
[INFO] |  |  |  +- org.eclipse.jetty:jetty-plus:jar:9.3.14.v20161028:compile
[INFO] |  |  |  +- javax.annotation:javax.annotation-api:jar:1.2:compile
[INFO] |  |  |  +- org.ow2.asm:asm:jar:5.0.1:compile
[INFO] |  |  |  \- org.ow2.asm:asm-commons:jar:5.0.1:compile
[INFO] |  |  |     \- org.ow2.asm:asm-tree:jar:5.0.1:compile
[INFO] |  |  +- org.eclipse.jetty.websocket:javax-websocket-client-impl:jar:9.3.14.v20161028:compile
[INFO] |  |  \- javax.websocket:javax.websocket-api:jar:1.0:compile
[INFO] |  \- org.mortbay.jasper:apache-el:jar:8.0.33:compile
[INFO] +- org.springframework.boot:spring-boot-devtools:jar:1.4.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot:jar:1.4.2.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-context:jar:4.3.4.RELEASE:compile
[INFO] |  \- org.springframework.boot:spring-boot-autoconfigure:jar:1.4.2.RELEASE:compile

PS 用 Spring Boot 1.4.2.RELEASE 测试

Note
Spring Boot 1.4.2.RELEASE use Jetty 9.3.14.v20161028

参考

  1. Spring Boot——嵌入式 servlet 容器
  2. 码头服务器

Spring Boot + JUnit 5 + Mockito

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-junit-5-mockito/

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

在本文中，我们将向您展示如何用 JUnit 5 和 Mockito 进行 Spring Boot 2 集成测试。

  • Spring Boot 2.1.2 .版本
  • JUnit 5
  • Mockito 2
  • maven3

简而言之，从spring-boot-starter-test中排除 junit4，手动包含 JUnit 5 jupiter 引擎，完成。

让我们看看下面的 Spring boot MVC web 应用，以及如何用 JUnit 5 进行单元测试，用 Mockito 框架进行 MVC。

1.专家

pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
<project 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
         http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.mkyong.spring</groupId>
    <artifactId>testing-junit5-mockito</artifactId>
    <version>1.0</version>

    <properties>
        <java.version>1.8</java.version>
        <junit-jupiter.version>5.3.2</junit-jupiter.version>
        <mockito.version>2.24.0</mockito.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.2.RELEASE</version>
    </parent>

    <dependencies>

        <!-- mvc -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- exclude junit 4 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>junit</groupId>
                    <artifactId>junit</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- junit 5 -->
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${
    
    junit-jupiter.version}</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
            </plugin>

        </plugins>
    </build>

</project>

显示项目依赖关系。

 $ mvn dependency:tree

[INFO] com.mkyong.spring:testing-junit5-mockito:jar:1.0
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:2.1.2.RELEASE:compile
[INFO] |  |  |  +- ch.qos.logback:logback-classic:jar:1.2.3:compile
[INFO] |  |  |  |  \- ch.qos.logback:logback-core:jar:1.2.3:compile
[INFO] |  |  |  +- org.apache.logging.log4j:log4j-to-slf4j:jar:2.11.1:compile
[INFO] |  |  |  |  \- org.apache.logging.log4j:log4j-api:jar:2.11.1:compile
[INFO] |  |  |  \- org.slf4j:jul-to-slf4j:jar:1.7.25:compile
[INFO] |  |  +- javax.annotation:javax.annotation-api:jar:1.3.2:compile
[INFO] |  |  \- org.yaml:snakeyaml:jar:1.23:runtime
[INFO] |  +- org.springframework.boot:spring-boot-starter-json:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.9.8:compile
[INFO] |  |  |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.9.0:compile
[INFO] |  |  |  \- com.fasterxml.jackson.core:jackson-core:jar:2.9.8:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jdk8:jar:2.9.8:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.9.8:compile
[INFO] |  |  \- com.fasterxml.jackson.module:jackson-module-parameter-names:jar:2.9.8:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter-tomcat:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-core:jar:9.0.14:compile
[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-el:jar:9.0.14:compile
[INFO] |  |  \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:9.0.14:compile
[INFO] |  +- org.hibernate.validator:hibernate-validator:jar:6.0.14.Final:compile
[INFO] |  |  +- javax.validation:validation-api:jar:2.0.1.Final:compile
[INFO] |  |  +- org.jboss.logging:jboss-logging:jar:3.3.2.Final:compile
[INFO] |  |  \- com.fasterxml:classmate:jar:1.4.0:compile
[INFO] |  +- org.springframework:spring-web:jar:5.1.4.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-beans:jar:5.1.4.RELEASE:compile
[INFO] |  \- org.springframework:spring-webmvc:jar:5.1.4.RELEASE:compile
[INFO] |     +- org.springframework:spring-aop:jar:5.1.4.RELEASE:compile
[INFO] |     +- org.springframework:spring-context:jar:5.1.4.RELEASE:compile
[INFO] |     \- org.springframework:spring-expression:jar:5.1.4.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-test:jar:2.1.2.RELEASE:test
[INFO] |  +- org.springframework.boot:spring-boot-test:jar:2.1.2.RELEASE:test
[INFO] |  +- org.springframework.boot:spring-boot-test-autoconfigure:jar:2.1.2.RELEASE:test
[INFO] |  +- com.jayway.jsonpath:json-path:jar:2.4.0:test
[INFO] |  |  +- net.minidev:json-smart:jar:2.3:test
[INFO] |  |  |  \- net.minidev:accessors-smart:jar:1.2:test
[INFO] |  |  |     \- org.ow2.asm:asm:jar:5.0.4:test
[INFO] |  |  \- org.slf4j:slf4j-api:jar:1.7.25:compile
[INFO] |  +- org.assertj:assertj-core:jar:3.11.1:test
[INFO] |  +- org.mockito:mockito-core:jar:2.24.0:test
[INFO] |  |  +- net.bytebuddy:byte-buddy:jar:1.9.7:test
[INFO] |  |  +- net.bytebuddy:byte-buddy-agent:jar:1.9.7:test
[INFO] |  |  \- org.objenesis:objenesis:jar:2.6:test
[INFO] |  +- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] |  +- org.hamcrest:hamcrest-library:jar:1.3:test
[INFO] |  +- org.skyscreamer:jsonassert:jar:1.5.0:test
[INFO] |  |  \- com.vaadin.external.google:android-json:jar:0.0.20131108.vaadin1:test
[INFO] |  +- org.springframework:spring-core:jar:5.1.4.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-jcl:jar:5.1.4.RELEASE:compile
[INFO] |  +- org.springframework:spring-test:jar:5.1.4.RELEASE:test
[INFO] |  \- org.xmlunit:xmlunit-core:jar:2.6.2:test
[INFO] |     \- javax.xml.bind:jaxb-api:jar:2.3.1:test
[INFO] |        \- javax.activation:javax.activation-api:jar:1.2.0:test
[INFO] +- org.junit.jupiter:junit-jupiter-engine:jar:5.3.2:test
[INFO] |  +- org.apiguardian:apiguardian-api:jar:1.0.0:test
[INFO] |  +- org.junit.platform:junit-platform-engine:jar:1.3.2:test
[INFO] |  |  +- org.junit.platform:junit-platform-commons:jar:1.3.2:test
[INFO] |  |  \- org.opentest4j:opentest4j:jar:1.1.1:test
[INFO] |  \- org.junit.jupiter:junit-jupiter-api:jar:5.3.2:test
[INFO] \- org.springframework.boot:spring-boot-devtools:jar:2.1.2.RELEASE:compile (optional)
[INFO]    +- org.springframework.boot:spring-boot:jar:2.1.2.RELEASE:compile
[INFO]    \- org.springframework.boot:spring-boot-autoconfigure:jar:2.1.2.RELEASE:compile

2.测试 Spring Boot + JUnit 5 + Mockito。

2.1 测试下列弹簧部件。

HelloServiceImpl.java

 package com.mkyong.core.services;

import com.mkyong.core.repository.HelloRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class HelloServiceImpl implements HelloService {
    
    

    @Autowired
    HelloRepository helloRepository;

    @Override
    public String get() {
    
    
        return helloRepository.get();
    }

}

HelloRepositoryImpl.java

 package com.mkyong.core.repository;

import org.springframework.stereotype.Repository;

@Repository
public class HelloRepositoryImpl implements HelloRepository {
    
    
    @Override
    public String get() {
    
    
        return "Hello JUnit 5";
    }
}

2.2 JUnit 5

HelloServiceTest.java

 package com.mkyong.core.services;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import static org.junit.jupiter.api.Assertions.assertEquals;

@SpringBootTest
public class HelloServiceTest {
    
    

    @Autowired
    HelloService helloService;

    @DisplayName("Test Spring @Autowired Integration")
    @Test
    void testGet() {
    
    
        assertEquals("Hello JUnit 5", helloService.get());
    }

}

2.3 Mockito.

HelloServiceMockTest.java

 package com.mkyong.core.services;

import com.mkyong.core.repository.HelloRepository;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.springframework.boot.test.context.SpringBootTest;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.Mockito.when;

@SpringBootTest
public class HelloServiceMockTest {
    
    

    @Mock
    private HelloRepository helloRepository;

    @InjectMocks // auto inject helloRepository
    private HelloService helloService = new HelloServiceImpl();

    @BeforeEach
    void setMockOutput() {
    
    
        when(helloRepository.get()).thenReturn("Hello Mockito From Repository");
    }

    @DisplayName("Test Mock helloService + helloRepository")
    @Test
    void testGet() {
    
    
        assertEquals("Hello Mockito From Repository", helloService.get());
    }

}

3.测试 Spring MVC 控制器。

3.1 MVC 控制器。

MainController.java

 package com.mkyong.core.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class MainController {
    
    

    @ResponseBody
    @GetMapping("/")
    public String hello() {
    
    
        return "Hello Controller";
    }

}

3.2 JUnit 5 和 MVC 测试。

MainControllerTest.java

 package com.mkyong.core.controller;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
import org.springframework.boot.test.web.client.TestRestTemplate;
import org.springframework.boot.web.server.LocalServerPort;
import org.springframework.http.ResponseEntity;

import java.net.URL;

import static org.junit.jupiter.api.Assertions.assertEquals;

@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
public class MainControllerTest {
    
    

    // bind the above RANDOM_PORT
    @LocalServerPort
    private int port;

    @Autowired
    private TestRestTemplate restTemplate;

    @Test
    public void getHello() throws Exception {
    
    

        ResponseEntity<String> response = restTemplate.getForEntity(
			new URL("http://localhost:" + port + "/").toString(), String.class);
        assertEquals("Hello Controller", response.getBody());

    }

}

完成了。

下载源代码

$ git clone https://github.com/mkyong/spring-boot.git
$ cd testing-junit5-mockito
$ mvn test

参考

Spring Boot Log4j 2 示例

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-log4j-2-example/

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

在本教程中，我们将向您展示如何在 Spring Boot 框架中使用 Apache Log4j 2 。

使用的技术:

  • Spring Boot 2.1.2 .版本
  • 弹簧 5.1.4 释放
  • Log4j 2.11.1
  • maven3
  • Java 8

1.项目目录

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

2.专家

关键是排除默认logback，用spring-boot-starter-log4j2包含log4j

pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
<project 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
	http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <artifactId>logging-log4j2</artifactId>
    <packaging>jar</packaging>
    <name>Spring Boot log4j2 Example</name>
    <url>https://www.mkyong.com</url>
    <version>1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.2.RELEASE</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <!-- exclude logback , add log4j2 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>

        <!-- asynchronous loggers -->
        <dependency>
            <groupId>com.lmax</groupId>
            <artifactId>disruptor</artifactId>
            <version>3.4.2</version>
        </dependency>

        <!-- for log4j2.yml, need jackson-databind and jackson-dataformat-yaml -->
        <!-- spring-boot-starter-web -> spring-boot-starter-json -> jackson-databind-->
        <!-- included by spring boot
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        -->

        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-yaml</artifactId>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <!-- Package as an executable jar/war -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
            </plugin>

        </plugins>
    </build>
</project>

显示项目依赖关系。

 $ mvn dependency:tree

[INFO] \- org.springframework.boot:spring-boot-starter-log4j2:jar:2.1.2.RELEASE:compile
[INFO]    +- org.apache.logging.log4j:log4j-slf4j-impl:jar:2.11.1:compile <--- slf4j to log4j bridge
[INFO]    |  \- org.apache.logging.log4j:log4j-api:jar:2.11.1:compile
[INFO]    +- org.apache.logging.log4j:log4j-core:jar:2.11.1:compile
[INFO]    +- org.apache.logging.log4j:log4j-jul:jar:2.11.1:compile
[INFO]    \- org.slf4j:jul-to-slf4j:jar:1.7.25:compile 

 $ mvn dependency:tree

[INFO] org.springframework.boot:logging-log4j2:jar:1.0
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter-json:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.9.8:compile
[INFO] |  |  |  \- com.fasterxml.jackson.core:jackson-annotations:jar:2.9.0:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jdk8:jar:2.9.8:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.9.8:compile
[INFO] |  |  \- com.fasterxml.jackson.module:jackson-module-parameter-names:jar:2.9.8:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter-tomcat:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-core:jar:9.0.14:compile
[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-el:jar:9.0.14:compile
[INFO] |  |  \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:9.0.14:compile
[INFO] |  +- org.hibernate.validator:hibernate-validator:jar:6.0.14.Final:compile
[INFO] |  |  +- javax.validation:validation-api:jar:2.0.1.Final:compile
[INFO] |  |  +- org.jboss.logging:jboss-logging:jar:3.3.2.Final:compile
[INFO] |  |  \- com.fasterxml:classmate:jar:1.4.0:compile
[INFO] |  +- org.springframework:spring-web:jar:5.1.4.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-beans:jar:5.1.4.RELEASE:compile
[INFO] |  \- org.springframework:spring-webmvc:jar:5.1.4.RELEASE:compile
[INFO] |     +- org.springframework:spring-aop:jar:5.1.4.RELEASE:compile
[INFO] |     +- org.springframework:spring-context:jar:5.1.4.RELEASE:compile
[INFO] |     \- org.springframework:spring-expression:jar:5.1.4.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-thymeleaf:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.thymeleaf:thymeleaf-spring5:jar:3.0.11.RELEASE:compile
[INFO] |  |  +- org.thymeleaf:thymeleaf:jar:3.0.11.RELEASE:compile
[INFO] |  |  |  +- org.attoparser:attoparser:jar:2.0.5.RELEASE:compile
[INFO] |  |  |  \- org.unbescape:unbescape:jar:1.1.6.RELEASE:compile
[INFO] |  |  \- org.slf4j:slf4j-api:jar:1.7.25:compile
[INFO] |  \- org.thymeleaf.extras:thymeleaf-extras-java8time:jar:3.0.2.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-autoconfigure:jar:2.1.2.RELEASE:compile
[INFO] |  +- javax.annotation:javax.annotation-api:jar:1.3.2:compile
[INFO] |  +- org.springframework:spring-core:jar:5.1.4.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-jcl:jar:5.1.4.RELEASE:compile
[INFO] |  \- org.yaml:snakeyaml:jar:1.23:compile
[INFO] +- org.springframework.boot:spring-boot-starter-log4j2:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.apache.logging.log4j:log4j-slf4j-impl:jar:2.11.1:compile
[INFO] |  |  \- org.apache.logging.log4j:log4j-api:jar:2.11.1:compile
[INFO] |  +- org.apache.logging.log4j:log4j-core:jar:2.11.1:compile
[INFO] |  +- org.apache.logging.log4j:log4j-jul:jar:2.11.1:compile
[INFO] |  \- org.slf4j:jul-to-slf4j:jar:1.7.25:compile
[INFO] +- com.lmax:disruptor:jar:3.4.2:compile
[INFO] \- com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:jar:2.9.8:compile
[INFO]    \- com.fasterxml.jackson.core:jackson-core:jar:2.9.8:compile

3.log4j2.xml

3.1 在项目类路径中创建一个log4j2.xml，src/resources/

src/resources/log4j2.xml

 <?xml version="1.0" encoding="UTF-8"?>
<Configuration status="DEBUG">
    <Appenders>
        <Console name="LogToConsole" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
        </Console>
        <File name="LogToFile" fileName="logs/app.log">
            <PatternLayout>
                <Pattern>%d %p %c{
    
    1.} [%t] %m%n</Pattern>
            </PatternLayout>
        </File>
    </Appenders>
    <Loggers>
        <Logger name="com.mkyong" level="debug" additivity="false">
            <AppenderRef ref="LogToFile"/>
            <AppenderRef ref="LogToConsole"/>
        </Logger>
        <Logger name="org.springframework.boot" level="error" additivity="false">
            <AppenderRef ref="LogToConsole"/>
        </Logger>
        <Root level="error">
            <AppenderRef ref="LogToFile"/>
            <AppenderRef ref="LogToConsole"/>
        </Root>
    </Loggers>
</Configuration>

3.2 对于log4j2.yml，我们需要包含jackson-databind和jackson-dataformat-yaml，因为jackson-databind已经包含在 Spring Boot 启动器中，所以我们只需要包含jackson-dataformat-yaml

pom.xml

 <!-- spring-boot-starter-web -> spring-boot-starter-json -> jackson-databind-->
	<!-- included by spring boot
	<dependency>
		<groupId>com.fasterxml.jackson.core</groupId>
		<artifactId>jackson-databind</artifactId>
	</dependency>
	-->

	<dependency>
		<groupId>com.fasterxml.jackson.dataformat</groupId>
		<artifactId>jackson-dataformat-yaml</artifactId>
	</dependency>

log4j2.yml

 Configuration:
  status: debug

  appenders:
    Console:
      name: LogToConsole
      PatternLayout:
        Pattern: "[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"

    RollingFile:
      - name: LogToRollingFile
        fileName: logs/app.log
        filePattern: "logs/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz"
        PatternLayout:
          pattern: "[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"
        Policies:
          SizeBasedTriggeringPolicy:
            size: 10MB
        DefaultRollOverStrategy:
          max: 10

  Loggers:
    logger:
      - name: com.mkyong
        level: debug
        additivity: false
        AppenderRef:
          - ref: LogToConsole
          - ref: LogToRollingFile

    Root:
      level: error
      AppenderRef:
        ref: LogToConsole

4.你好 log4j2

4.1 一个简单的 Spring MVC web 应用，用 log4j2 登录。

HelloController.java

 package com.mkyong;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.Arrays;
import java.util.List;

@Controller
public class HelloController {
    
    

    private static final Logger logger = LogManager.getLogger(HelloController.class);

    private List<Integer> num = Arrays.asList(1, 2, 3, 4, 5);

    @GetMapping("/")
    public String main(Model model) {
    
    

        // pre-java 8
        if (logger.isDebugEnabled()) {
    
    
            logger.debug("Hello from Log4j 2 - num : {}", num);
        }

        // java 8 lambda, no need to check log level
        logger.debug("Hello from Log4j 2 - num : {}", () -> num);

        model.addAttribute("tasks", num);
        return "welcome"; //view
    }

    private int getNum() {
    
    
        return 100;
    }

}

4.2 模板

src/resources/templates/welcome.html

 <!DOCTYPE HTML>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head></head>
<body>

<h1>Spring Boot + log4j2 example</h1>
<ul>
    <li th:each="task : ${tasks}" th:text="${task}"></li>
</ul>

</body>
</html>

5.演示

5.1 启动 Spring Boot

StartApplication.java

 package com.mkyong;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class StartApplication {
    
    

    public static void main(String[] args) {
    
    
        SpringApplication.run(StartApplication.class, args);
    }

}

http://localhost:8080

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

查看日志记录:

Terminal

 19:10:08.723 [http-nio-8080-exec-1] DEBUG com.mkyong.HelloController - Hello from Log4j 2 - num : [1, 2, 3, 4, 5]
19:10:08.724 [http-nio-8080-exec-1] DEBUG com.mkyong.HelloController - Hello from Log4j 2 - num : [1, 2, 3, 4, 5]

6.log4j 2–异步记录器

6.1 要启用异步日志，我们需要包含disruptor

pom.xml

 <dependency>
		<groupId>com.lmax</groupId>
		<artifactId>disruptor</artifactId>
		<version>3.4.2</version>
	</dependency>

6.2 设置系统属性log4j2.contextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector

Terminal

 $ mvn package 

$ java -Dlog4j2.contextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector -jar target/logging-log4j2-1.0.jar

019-03-27 19:28:57,185 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3
2019-03-27 19:28:57,189 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=AsyncLoggerRingBuffer
2019-03-27 19:28:57,194 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=StatusLogger
2019-03-27 19:28:57,195 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=ContextSelector
2019-03-27 19:28:57,195 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=Loggers,name=org.springframework.boot
2019-03-27 19:28:57,196 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=Loggers,name=
2019-03-27 19:28:57,196 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=Loggers,name=com.mkyong
2019-03-27 19:28:57,197 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=Appenders,name=LogToConsole
2019-03-27 19:28:57,200 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=Appenders,name=LogToFile

下载源代码

$ git clone https://github.com/mkyong/spring-boot.git
$ cd logging-log4j2
$ mvn spring-boot:run
Access localhost:8080

$ mvn 包
$ Java-dlog 4j 2 . context selector = org . Apache . logging . log4j . core . async . asyncloggercontextselector-jar target/logging-log4j 2-1.0 . jar
Accesslocalhost:8080

参考

Spring Boot 非 web 应用示例

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-non-web-application-example/

在 Spring Boot，要创建一个非 web 应用程序，实现CommandLineRunner并覆盖run方法，例如:

 import org.springframework.boot.CommandLineRunner;

@SpringBootApplication
public class SpringBootConsoleApplication implements CommandLineRunner {
    
    

    public static void main(String[] args) throws Exception {
    
    

        SpringApplication.run(SpringBootConsoleApplication.class, args);

    }

    //access command line arguments
    @Override
    public void run(String... args) throws Exception {
    
    

        //do something

    }
}

1.项目结构

一个标准的 Maven 项目结构。

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

2.项目依赖性

仅spring-boot-starter

pom.xml

 <project 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
  http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.mkyong</groupId>
    <artifactId>spring-boot-simple</artifactId>
    <packaging>jar</packaging>
    <version>1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.1.RELEASE</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <!-- Package as an executable jar/war -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

3.春天

3.1 返回消息的服务。

HelloMessageService.java

 package com.mkyong.service;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

@Service
public class HelloMessageService {
    
    

    @Value("${name:unknown}")
    private String name;

    public String getMessage() {
    
    
        return getMessage(name);
    }

    public String getMessage(String name) {
    
    
        return "Hello " + name;
    }

}

application.properties

 name=mkyong

3.2 CommandLineRunner示例。如果您运行这个 Spring Boot，那么run方法将是入口点。

SpringBootConsoleApplication.java

 package com.mkyong;

import com.mkyong.service.HelloMessageService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.Banner;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import static java.lang.System.exit;

@SpringBootApplication
public class SpringBootConsoleApplication implements CommandLineRunner {
    
    

    @Autowired
    private HelloMessageService helloService;

    public static void main(String[] args) throws Exception {
    
    

        //disabled banner, don't want to see the spring logo
        SpringApplication app = new SpringApplication(SpringBootConsoleApplication.class);
        app.setBannerMode(Banner.Mode.OFF);
        app.run(args);

    }

	// Put your logic here.
    @Override
    public void run(String... args) throws Exception {
    
    

        if (args.length > 0) {
    
    
            System.out.println(helloService.getMessage(args[0].toString()));
        } else {
    
    
            System.out.println(helloService.getMessage());
        }

        exit(0);
    }
}

4.演示

打包并运行它。

 ## Go to project directory
## package it
$ mvn package

$ java -jar target/spring-boot-simple-1.0.jar
Hello mkyong

$ java -jar target/spring-boot-simple-1.0.jar "donald trump"
Hello donald trump

下载源代码

Download – spring-boot-non-web-example.zip (5 KB)

参考

  1. 命令行运行程序 JavaDoc

Tags : CommandLineRunner executable jar jar spring boot

相关文章

Spring Boot-基于配置文件的属性和 yaml 示例

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-profile-based-properties-and-yaml-example/

在 Spring Boot，它按以下顺序挑选.properties或.yaml文件:

  • application-{profile}.properties和 YAML 的变种
  • application.properties和 YAML 的变种

Note
For detail, sequence and order, please refer to this official Externalized Configuration documentation.

测试:

  • Spring Boot 2.1.2 .版本
  • maven3

1.项目结构

一个标准的 Maven 项目结构。

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

2.@配置属性

稍后读取属性或 yaml 文件。

ServerProperties.java

 package com.mkyong.config;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;

@Component
@ConfigurationProperties("server")
public class ServerProperties {
    
    

    private String email;
    private List<Cluster> cluster = new ArrayList<>();

    public static class Cluster {
    
    
        private String ip;
        private String path;

        public String getIp() {
    
    
            return ip;
        }

        public void setIp(String ip) {
    
    
            this.ip = ip;
        }

        public String getPath() {
    
    
            return path;
        }

        public void setPath(String path) {
    
    
            this.path = path;
        }

        @Override
        public String toString() {
    
    
            return "Cluster{" +
                    "ip='" + ip + '\'' +
                    ", path='" + path + '\'' +
                    '}';
        }
    }

    public String getEmail() {
    
    
        return email;
    }

    public void setEmail(String email) {
    
    
        this.email = email;
    }

    public List<Cluster> getCluster() {
    
    
        return cluster;
    }

    public void setCluster(List<Cluster> cluster) {
    
    
        this.cluster = cluster;
    }

    @Override
    public String toString() {
    
    
        return "ServerProperties{" +
                "email='" + email + '\'' +
                ", cluster=" + cluster +
                '}';
    }
}

3.基于配置文件的属性

多个配置文件.properties示例。

application.properties

 #Logging
logging.level.org.springframework.web=ERROR
logging.level.com.mkyong=ERROR
logging.level.=error

#spring
spring.main.banner-mode=off
spring.profiles.active=dev

application-dev.properties

 #dev environment
server.email: dev@mkyong.com
server.cluster[0].ip=127.0.0.1
server.cluster[0].path=/dev1
server.cluster[1].ip=127.0.0.2
server.cluster[1].path=/dev2
server.cluster[2].ip=127.0.0.3
server.cluster[2].path=/dev3

application-prod.properties

 #production environment
server.email: prod@mkyong.com
server.cluster[0].ip=192.168.0.1
server.cluster[0].path=/app1
server.cluster[1].ip=192.168.0.2
server.cluster[1].path=/app2
server.cluster[2].ip=192.168.0.3
server.cluster[2].path=/app3

4.基于配置文件的 YAML

多个配置文件.yml示例。在 YAML，我们可以通过使用“—”分隔符来创建多个概要文件。

application.yml

 logging:
  level:
    .: error
    org.springframework: ERROR
    com.mkyong: ERROR

spring:
  profiles:
    active: "dev"
  main:
    banner-mode: "off"

server:
  email: default@mkyong.com

---

spring:
  profiles: dev
server:
  email: dev@mkyong.com
  cluster:
    - ip: 127.0.0.1
      path: /dev1
    - ip: 127.0.0.2
      path: /dev2
    - ip: 127.0.0.3
      path: /dev3

---

spring:
  profiles: prod
server:
  email: prod@mkyong.com
  cluster:
    - ip: 192.168.0.1
      path: /app1
    - ip: 192.168.0.2
      path: /app2
    - ip: 192.168.0.3
      path: /app3

5.演示

5.1 Spring Boot 应用程序。

Application.java

 package com.mkyong;

import com.mkyong.config.ServerProperties;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application implements CommandLineRunner {
    
    

    @Autowired
    private ServerProperties serverProperties;

    @Override
    public void run(String... args) {
    
    
        System.out.println(serverProperties);
    }

    public static void main(String[] args) {
    
    
        SpringApplication.run(Application.class, args);
    }

}

5.2 打包并运行它。

 $ mvn package

# The 'dev' profile is configured in application.properties

# Profile : dev , picks application-dev.properties or YAML 
$ java -jar target/spring-boot-profile-1.0.jar

ServerProperties{
    
    email='[email protected]', cluster=[
	Cluster{
    
    ip='127.0.0.1', path='/dev1'}, 
	Cluster{
    
    ip='127.0.0.2', path='/dev2'}, 
	Cluster{
    
    ip='127.0.0.3', path='/dev3'}
]}

# Profile : prod, picks application-prod.properties or YAML
$ java -jar -Dspring.profiles.active=prod target/spring-boot-profile-1.0.jar

ServerProperties{
    
    email='[email protected]', cluster=[
	Cluster{
    
    ip='192.168.0.1', path='/app1'}, 
	Cluster{
    
    ip='192.168.0.2', path='/app2'}, 
	Cluster{
    
    ip='192.168.0.3', path='/app3'}
]}

# Profile : abc, a non-exists profile
$ java -jar -Dspring.profiles.active=abc target/spring-boot-profile-1.0.jar
ServerProperties{
    
    email='null', cluster=[]}

Note
Spring Boot, the default profile is default, we can set the profile via spring.profiles.active property.

下载源代码

$ git clone https://github.com/mkyong/spring-boot.git

属性示例
$ cd 配置文件-属性
$ mvn 包

YAML 示例
$ cd 简介-yaml
$mvn 包

参考

Spring Boot 配置文件示例

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-profiles-example/

在本文中，我们将向您展示如何在 Spring Boot 使用@Profile以及如何测试它。

使用的工具:

  1. Spring Boot 1.5.1 .版本
  2. 专家

1.项目结构

一个标准的 Maven 项目结构。

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传 ## 2.项目依赖性

标准spring-boot-starter和spring-boot-starter-test

pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
<project 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
	http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <artifactId>spring-boot-profile</artifactId>
    <packaging>jar</packaging>
    <name>Spring Boot Profiles Example</name>
    <description>Spring Boot Profiles Example</description>
    <url>https://www.mkyong.com</url>
    <version>1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.2.RELEASE</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <!-- Package as an executable jar/war -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3.Spring Boot

在 Spring Boot，默认配置文件是“default”。查看以下天气服务。

3.1 一个接口。

WeatherService.java

 package com.mkyong.service;

public interface WeatherService {
    
    

    String forecast();

}

3.2 简介:阳光默认。

SunnyDayService.java

 package com.mkyong.service;

import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Service;

@Service
@Profile({
    
    "sunny", "default"})
public class SunnyDayService implements WeatherService {
    
    

    @Override
    public String forecast() {
    
    
        return "Today is sunny day!";
    }

}

3.3 简介:下雨。

RainingDayService.java

 package com.mkyong.service;

import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Service;

@Service
@Profile("raining")
public class RainingDayService implements WeatherService {
    
    

    @Override
    public String forecast() {
    
    
        return "Today is raining day!";
    }

}

3.4 启动 Spring Boot 应用程序。

Application.java

 package com.mkyong;

import com.mkyong.service.WeatherService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application implements CommandLineRunner {
    
    

    @Autowired
    private WeatherService weatherService;

    @Override
    public void run(String... args) throws Exception {
    
    
        //weather forecast, default is sunny day!
        System.out.println(weatherService.forecast());
    }

    public static void main(String[] args) throws Exception {
    
    
        SpringApplication.run(Application.class, args);
    }

}

3.5 属性文件。

application.properties

 # default profile is 'defau;t'
#spring.profiles.active=sunny

logging.level.=error
spring.main.banner-mode=off

4.单元测试

一些单元测试的例子。

4.1 服务类的单元测试。通过@ActiveProfiles设置激活的个人信息

TestWeatherService.java

 package com.mkyong;

import com.mkyong.service.WeatherService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.ActiveProfiles;
import org.springframework.test.context.junit4.SpringRunner;

import static org.assertj.core.api.Assertions.assertThat;

@RunWith(SpringRunner.class)
@SpringBootTest
@ActiveProfiles("raining")
public class TestWeatherService {
    
    

    @Autowired
    WeatherService weatherService;

    @Test
    public void testRainingProfile() throws Exception {
    
    
        String output = weatherService.forecast();
        assertThat(output).contains("Today is raining day!");
    }
}

4.2 对 Spring Boot 应用程序进行单元测试。您可以通过属性spring.profiles.active设置活动配置文件

TestApplication.java

 package com.mkyong;

import org.junit.After;
import org.junit.Rule;
import org.junit.Test;
import org.springframework.boot.test.rule.OutputCapture;

import static org.assertj.core.api.Assertions.assertThat;

public class TestApplication {
    
    

    @Rule
    public OutputCapture outputCapture = new OutputCapture();

    @Test
    public void testDefaultProfile() throws Exception {
    
    
        Application.main(new String[0]);
        String output = this.outputCapture.toString();
        assertThat(output).contains("Today is sunny day!");
    }

    @Test
    public void testRainingProfile() throws Exception {
    
    
        System.setProperty("spring.profiles.active", "raining");
        Application.main(new String[0]);
        String output = this.outputCapture.toString();
        assertThat(output).contains("Today is raining day!");
    }

    @Test
    public void testRainingProfile_withDoption() throws Exception {
    
    
        Application.main(new String[]{
    
    "--spring.profiles.active=raining"});
        String output = this.outputCapture.toString();
        assertThat(output).contains("Today is raining day!");
    }

    @After
    public void after() {
    
    
        System.clearProperty("spring.profiles.active");
    }

}

这个 Spring Boot 的例子值得称赞。

5.演示

打包并运行它。

 $ mvn package

#default profile, sunny day!
$ java -jar target/spring-boot-profile-1.0.jar
Today is sunny day!

# set a profile
$ java -jar -Dspring.profiles.active=raining target/spring-boot-profile-1.0.jar
Today is raining day!

下载源代码

Download – spring-boot-profile-example.zip (5 KB)

参考

  1. 弹簧轮廓示例
  2. Spring Boot–属性&配置
  3. Spring Boot–简介

profiles spring boot spring profile

Spring Boot-应用程序启动时运行代码

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-run-code-when-the-application-starts/

在 Spring Boot，当应用程序完全启动时，我们可以创建一个CommandLineRunner bean 来运行代码。

StartBookApplication.java

 package com.mkyong;

import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;

@SpringBootApplication
public class StartBookApplication {
    
    

    public static void main(String[] args) {
    
    
        SpringApplication.run(StartBookApplication.class, args);
    }

	// Injects a repository bean
    @Bean
    CommandLineRunner initDatabase(BookRepository repository) {
    
    
        return args -> {
    
    

            repository.save(
				new Book("A Guide to the Bodhisattva Way of Life")
			);

        };
    }

	// Injects a ApplicationContext
    @Bean
    CommandLineRunner initPrint(ApplicationContext ctx) {
    
    
        return args -> {
    
    

            System.out.println("All beans loaded by Spring Boot:\n");

            List<String> beans = Arrays.stream(ctx.getBeanDefinitionNames())
				.sorted(Comparator.naturalOrder())
				.collect(Collectors.toList());

            beans.forEach(x -> System.out.println(x));

        };
    }

	// Injects nothing
    @Bean
    CommandLineRunner initPrintOneLine() {
    
    
        return args -> {
    
    

            System.out.println("Hello World Spring Boot!");

        };
    }

}

用 Spring Boot 2 号进行了测试

参考

Spring Boot–显示 Hibernate SQL 查询

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-show-hibernate-sql-query/

在application.properties中添加以下行来记录 Hibernate SQL 查询。

application.properties

 #show sql statement
logging.level.org.hibernate.SQL=debug

#show sql values
logging.level.org.hibernate.type.descriptor.sql=trace

1.org.hibernate.SQL=debug

application.properties

 logging.level.org.hibernate.SQL=debug

1.1 选择查询。

Console

 2017-02-23 21:36:42 DEBUG org.hibernate.SQL - select customer0_.id as id1_0_, 
	customer0_.created_date as created_date2_0_, customer0_.email as email3_0_, 
	customer0_.name as name4_0_ from customer customer0_

2.org . hibernate . type . descriptor . SQL = trace

application.properties

 logging.level.org.hibernate.SQL=debug
logging.level.org.hibernate.type.descriptor.sql=trace

2.1 选择查询及其值。

Console

 2017-02-23 21:39:23 DEBUG org.hibernate.SQL - select customer0_.id as id1_0_, 
	customer0_.created_date as created_date2_0_, customer0_.email as email3_0_, 
	customer0_.name as name4_0_ from customer customer0_

	2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([id1_0_] : [BIGINT]) - [1]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([created_date2_0_] : [TIMESTAMP]) - [2017-02-11 00:00:00.0]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([email3_0_] : [VARCHAR]) - [111@yahoo.com]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([name4_0_] : [VARCHAR]) - [mkyong]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([id1_0_] : [BIGINT]) - [2]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([created_date2_0_] : [TIMESTAMP]) - [2017-02-12 00:00:00.0]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([email3_0_] : [VARCHAR]) - [222@yahoo.com]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([name4_0_] : [VARCHAR]) - [yflow]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([id1_0_] : [BIGINT]) - [3]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([created_date2_0_] : [TIMESTAMP]) - [2017-02-13 00:00:00.0]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([email3_0_] : [VARCHAR]) - [333@yahoo.com]
2017-02-23 21:39:23 TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([name4_0_] : [VARCHAR]) - [zilap]

2.2 插入查询及其值。

Console

 2017-02-23 21:44:15 DEBUG org.hibernate.SQL - select customer_seq.nextval from dual
2017-02-23 21:44:15 DEBUG org.hibernate.SQL - insert into customer (created_date, email, name, id) values (?, ?, ?, ?)

2017-02-23 21:44:15 TRACE o.h.type.descriptor.sql.BasicBinder - binding parameter [1] as [TIMESTAMP] - [Thu Feb 23 21:44:15 SGT 2017]
2017-02-23 21:44:15 TRACE o.h.type.descriptor.sql.BasicBinder - binding parameter [2] as [VARCHAR] - [aa]
2017-02-23 21:44:15 TRACE o.h.type.descriptor.sql.BasicBinder - binding parameter [3] as [VARCHAR] - [a]
2017-02-23 21:44:15 TRACE o.h.type.descriptor.sql.BasicBinder - binding parameter [4] as [BIGINT] - [1]

Note
You might be interested in this article – Hibernate Logging Guide

参考

  1. Spring Boot SLF4J 测井示例

Spring Boot SLF4j 回溯示例

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-slf4j-logging-example/

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

在本教程中，我们将向您展示如何在 Spring Boot 框架中使用 Logback 。

使用的技术:

  • Spring Boot 2.1.2 .版本
  • 弹簧 5.1.4 释放
  • 回溯 1.2.3
  • maven3
  • Java 8

1.项目目录

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

2.专家

在 Spring Boot，Logback 是默认的日志框架，只需添加spring-boot-starter-web，它将引入logback依赖项。

pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
<project  
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
		 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <artifactId>spring-boot-slf4j</artifactId>
    <packaging>jar</packaging>
    <name>Spring Boot SLF4j</name>
    <version>1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.2.RELEASE</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

    </dependencies>
    <build>
        <plugins>
            <!-- Package as an executable jar/war -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
            </plugin>
        </plugins>
    </build>
</project>

显示项目依赖关系。

 $ mvn dependency:tree

+- org.springframework.boot:spring-boot-starter-web:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:2.1.2.RELEASE:compile
[INFO] |  |  |  +- ch.qos.logback:logback-classic:jar:1.2.3:compile
[INFO] |  |  |  |  \- ch.qos.logback:logback-core:jar:1.2.3:compile 

 $ mvn dependency:tree

org.springframework.boot:spring-boot-slf4j:jar:1.0
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:2.1.2.RELEASE:compile
[INFO] |  |  |  +- ch.qos.logback:logback-classic:jar:1.2.3:compile
[INFO] |  |  |  |  \- ch.qos.logback:logback-core:jar:1.2.3:compile
[INFO] |  |  |  +- org.apache.logging.log4j:log4j-to-slf4j:jar:2.11.1:compile
[INFO] |  |  |  |  \- org.apache.logging.log4j:log4j-api:jar:2.11.1:compile
[INFO] |  |  |  \- org.slf4j:jul-to-slf4j:jar:1.7.25:compile
[INFO] |  |  +- javax.annotation:javax.annotation-api:jar:1.3.2:compile
[INFO] |  |  +- org.springframework:spring-core:jar:5.1.4.RELEASE:compile
[INFO] |  |  |  \- org.springframework:spring-jcl:jar:5.1.4.RELEASE:compile
[INFO] |  |  \- org.yaml:snakeyaml:jar:1.23:runtime
[INFO] |  +- org.springframework.boot:spring-boot-starter-json:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.9.8:compile
[INFO] |  |  |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.9.0:compile
[INFO] |  |  |  \- com.fasterxml.jackson.core:jackson-core:jar:2.9.8:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jdk8:jar:2.9.8:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.9.8:compile
[INFO] |  |  \- com.fasterxml.jackson.module:jackson-module-parameter-names:jar:2.9.8:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter-tomcat:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-core:jar:9.0.14:compile
[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-el:jar:9.0.14:compile
[INFO] |  |  \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:9.0.14:compile
[INFO] |  +- org.hibernate.validator:hibernate-validator:jar:6.0.14.Final:compile
[INFO] |  |  +- javax.validation:validation-api:jar:2.0.1.Final:compile
[INFO] |  |  +- org.jboss.logging:jboss-logging:jar:3.3.2.Final:compile
[INFO] |  |  \- com.fasterxml:classmate:jar:1.4.0:compile
[INFO] |  +- org.springframework:spring-web:jar:5.1.4.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-beans:jar:5.1.4.RELEASE:compile
[INFO] |  \- org.springframework:spring-webmvc:jar:5.1.4.RELEASE:compile
[INFO] |     +- org.springframework:spring-aop:jar:5.1.4.RELEASE:compile
[INFO] |     +- org.springframework:spring-context:jar:5.1.4.RELEASE:compile
[INFO] |     \- org.springframework:spring-expression:jar:5.1.4.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-thymeleaf:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.thymeleaf:thymeleaf-spring5:jar:3.0.11.RELEASE:compile
[INFO] |  |  +- org.thymeleaf:thymeleaf:jar:3.0.11.RELEASE:compile
[INFO] |  |  |  +- org.attoparser:attoparser:jar:2.0.5.RELEASE:compile
[INFO] |  |  |  \- org.unbescape:unbescape:jar:1.1.6.RELEASE:compile
[INFO] |  |  \- org.slf4j:slf4j-api:jar:1.7.25:compile
[INFO] |  \- org.thymeleaf.extras:thymeleaf-extras-java8time:jar:3.0.2.RELEASE:compile
[INFO] \- org.springframework.boot:spring-boot-devtools:jar:2.1.2.RELEASE:compile (optional)
[INFO]    +- org.springframework.boot:spring-boot:jar:2.1.2.RELEASE:compile
[INFO]    \- org.springframework.boot:spring-boot-autoconfigure:jar:2.1.2.RELEASE:compile

3.应用程序.属性

3.1 在application.properties中配置记录

application.properties

 # logging level
logging.level.org.springframework=ERROR
logging.level.com.mkyong=DEBUG

# output to a file
logging.file=app.log

# temp folder example
#logging.file=${
    
    java.io.tmpdir}/app.log

logging.pattern.file=%d %p %c{
    
    1.} [%t] %m%n

logging.pattern.console=%d{
    
    HH:mm:ss.SSS} [%t] %-5level %logger{
    
    36} - %msg%n

## if no active profile, default is 'default'
##spring.profiles.active=prod

# root level
#logging.level.=INFO

3.2 这相当于 YAML 格式。

application.yml

 logging:
  level:
    org.springframework: ERROR
    com.mkyong: DEBUG
  pattern:
    console: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"
    file: "%d %p %c{1.} [%t] %m%n"
  file: app.log

4.logback.xml

上面的日志配置对于开发来说已经足够了。对于生产，我们需要更多的日志功能，如文件滚动或 SMTP。在 Spring Boot，我们仍然允许通过标准logback.xml配置回退

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传logback.xml

 <?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <property name="HOME_LOG" value="logs/app.log"/>

    <appender name="FILE-ROLLING" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${
    
    HOME_LOG}</file>

        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>logs/archived/app.%d{
    
    yyyy-MM-dd}.%i.log</fileNamePattern>
            <!-- each archived file, size max 10MB -->
            <maxFileSize>10MB</maxFileSize>
            <!-- total size of all archive files, if total size > 20GB, 
				it will delete old archived file -->
            <totalSizeCap>20GB</totalSizeCap>
            <!-- 60 days to keep -->
            <maxHistory>60</maxHistory>
        </rollingPolicy>

        <encoder>
            <pattern>%d %p %c{
    
    1.} [%t] %m%n</pattern>
        </encoder>
    </appender>

    <logger name="com.mkyong" level="debug" additivity="false">
        <appender-ref ref="FILE-ROLLING"/>
    </logger>

    <root level="error">
        <appender-ref ref="FILE-ROLLING"/>
    </root>

</configuration>

5.按剖面进行 Spring Boot 测井

Note
Read this – Profile-specific configuration

为了利用 Spring Boot 提供的模板特性，我们可以在类路径的根目录下创建一个logback-spring.xml。

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

在下面的配置中:

  • 如果没有活动的配置文件(默认)，则记录到控制台。
  • 如果配置文件是prod，记录到一个滚动文件。

logback-spring.xml

 <?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <include resource="org/springframework/boot/logging/logback/defaults.xml" />

    <springProfile name="default">
        <include resource="org/springframework/boot/logging/logback/console-appender.xml"/>

        <root level="INFO">
            <appender-ref ref="CONSOLE"/>
        </root>
    </springProfile>

    <springProfile name="prod">

        <appender name="FILE-ROLLING" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <file>app.log</file>

            <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
                <fileNamePattern>logs/archived/app.%d{
    
    yyyy-MM-dd}.%i.log</fileNamePattern>
                <!-- each archived file, size max 10MB -->
                <maxFileSize>10MB</maxFileSize>
                <!-- total size of all archive files, if total size > 20GB, it will delete old archived file -->
                <totalSizeCap>20GB</totalSizeCap>
                <!-- 60 days to keep -->
                <maxHistory>60</maxHistory>
            </rollingPolicy>

            <encoder>
                <pattern>%d %p %c{
    
    1.} [%t] %m%n</pattern>
            </encoder>
        </appender>

        <logger name="org.springframework" level="INFO"/>
        <logger name="com.mkyong" level="DEBUG"/>
        <root level="ERROR">
            <appender-ref ref="FILE-ROLLING"/>
        </root>
    </springProfile>

</configuration>

定义一个spring.profiles.active属性来设置当前活动的配置文件。

application.properties

 ## if no active profile, default is 'default'
spring.profiles.active=prod

6.你好 Logback

6.1 一个简单的 Spring MVC web 应用程序，记录一些东西。

HelloController.java

 package com.mkyong;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.Arrays;
import java.util.List;

@Controller
public class HelloController {
    
    

    private static final Logger logger = LoggerFactory.getLogger(HelloController.class);

    @GetMapping("/")
    public String hello(Model model) {
    
    

        List<Integer> data = Arrays.asList(1, 2, 3, 4, 5);

        logger.debug("Hello from Logback {}", data);

        model.addAttribute("num", data);

        return "index"; // index.html
    }

}

6.2 模板

src/resources/templates/index.html

 <!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title>Spring Boot SLF4j Logback</title>
    <link rel="stylesheet" th:href="@{/css/main.css}" href="../../css/main.css"/>
</head>
<body>

<h1>Spring Boot + SLF4j Logback example</h1>
<ul>
    <li th:each="n : ${num}" th:text="${n}"></li>
</ul>

</body>
</html>

6.3 CSS

src/resources/static/css/main.css

 h1{
    
    
	color:#0000FF;
}

7.演示

7.1 启动 Spring Boot

StartWebApplication.java

 package com.mkyong;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class StartWebApplication {
    
    

	public static void main(String[] args) {
    
    
		SpringApplication.run(StartWebApplication.class, args);
	}

}

http://localhost:8080

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传Terminal

 15:15:11.588 [http-nio-8080-exec-1] DEBUG com.mkyong.HelloController - Hello from Logback [1, 2, 3, 4, 5]

下载源代码

$ git clone https://github.com/mkyong/spring-boot.git
$ cd logging-slf4j-logback
$ mvn spring-boot:run

访问 localhost:8080
查看控制台记录信息。

参考

Spring Boot +春季数据 JPA + Java 8 日期和时间(JSR310)

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-spring-data-jpa-java-8-date-and-time-jsr310/

在 Spring Boot + Spring Data JPA 应用程序中，为了支持 JSR 310java.time.*API，我们需要手动注册这个Jsr310JpaConverters。

 import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.data.jpa.convert.threeten.Jsr310JpaConverters;

@EntityScan(
        basePackageClasses = {
    
    Application.class, Jsr310JpaConverters.class}
)
@SpringBootApplication
public class Application {
    
    
	//...
}

用 Spring Boot 1.5.1 .版本测试的 PS，Spring Data JPA 1.11.0 .版本

1.完整示例

1.1 一个模型包含一个java.time.LocalDate字段。

 package com.mkyong.model;

import javax.persistence.*;
import java.time.LocalDate;

@Entity
public class Customer {
    
    

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "CUST_SEQ")
    @SequenceGenerator(sequenceName = "customer_seq", allocationSize = 1, name = "CUST_SEQ")
    Long id;

    String name;

    @Column(name = "CREATED_DATE")
    LocalDate date;

	//...

1.2 @EntityScan扫描并记录Jsr310JpaConverters如下:

 package com.mkyong;

import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.data.jpa.convert.threeten.Jsr310JpaConverters;

import java.util.Arrays;

//for jsr310 java 8 java.time.*
@EntityScan(
        basePackageClasses = {
    
    Application.class, Jsr310JpaConverters.class}
)
@SpringBootApplication
public class Application {
    
    

    public static void main(String[] args) throws Exception {
    
    
        SpringApplication.run(Application.class, args);
    }

    @Bean
    public CommandLineRunner run(ApplicationContext appContext) {
    
    
        return args -> {
    
    

            System.out.println("hello World!");

        };
    }

}

参考

  1. JSR 310 JPA converters JavaDoc
  2. JSR 310:日期和时间 API
  3. Spring Data MongoDB + JSR-310 或 Java 8 新日期 API

Spring Boot +春天数据 JPA + MySQL

原文：http://web.archive.org/web/20230101150211/https://mkyong.com/spring-boot/spring-boot-spring-data-jpa-mysql-example/

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

之前的 Spring Boot + Spring 数据 JPA 将被重用，修改为支持 MySQL 数据库。

使用的技术:

  • Spring Boot 2.1.2 .版本
  • 弹簧 5.1.4 释放
  • 休眠 5.3.7
  • HikariCP 3.2.0
  • MySQL-连接器-java:jar 8.0.13
  • maven3
  • Java 8

1.专家

为了连接一个 MySQL，声明mysql-connector-java

pom.xml

 <dependency>
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
	</dependency>

pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
<project 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
		 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <artifactId>spring-boot-data-jpa</artifactId>
    <packaging>jar</packaging>
    <name>Spring Boot Spring Data JPA</name>
    <version>1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.2.RELEASE</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
        <downloadSources>true</downloadSources>
        <downloadJavadocs>true</downloadJavadocs>
    </properties>

    <dependencies>

        <!-- jpa, crud repository -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <!-- MySQL -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>

            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
            </plugin>

        </plugins>

    </build>
</project>

2.配置 MySQL

2.1 更新spring.datasource.*中的 MySQL 设置

application.properties

 ## MySQL
spring.datasource.url=jdbc:mysql://localhost:3306/wordpress
spring.datasource.username=mkyong
spring.datasource.password=password

#`hibernate_sequence' doesn't exist
spring.jpa.hibernate.use-new-id-generator-mappings=false

# drop n create table, good for testing, comment this in production
spring.jpa.hibernate.ddl-auto=create

完成了。

下载源代码

$ git clone https://github.com/mkyong/spring-boot.git
$ cd spring-data-jpa-mysql
$ mvn spring-boot:run

参考

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