Springboot学习摘要（一） 入门

pom：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" 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.crisy</groupId>
    <artifactId>demo01</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo01</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.7.RELEASE</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

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

		<!-- 测试模块，包括JUnit、Hamcrest、Mockito  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
		<!-- 核心模块，包括自动配置支持、日志和YAML； -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<!-- 虽然平时开发web项目过程中，改动项目启重启总是报错；但springBoot对调试支持很好，修改之后可以实时生效，需要添加以下的配置： -->
		<dependency>
	        <groupId>org.springframework.boot</groupId>
	        <artifactId>spring-boot-devtools</artifactId>
	        <optional>true</optional>
   		</dependency>
    </dependencies>

    <build>
        <plugins>
            <!-- 这是spring boot devtool plugin -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <!--也是修改之后可以实时生效的配置 -->
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

启动类：

@SpringBootApplication
@ComponentScan(basePackages = {"com.crisy.*"})
public class Demo01Application extends SpringBootServletInitializer{

	public static void main(String[] args) {
		SpringApplication.run(Demo01Application.class, args);
	}
}

HelloWorld：

@RestController
public class HelloWorldController {
    @RequestMapping("/hello")
    public String index() {
        return "Hello World";
    }
}

遇到的问题：

一、启动类不能直接放在src.java.main下面

二、@SpringBootApplication只会扫描启动类同级包以及下级包里的所有Bean，可以添加注解 @ComponentScan(basePackages = {"com.crisy.*"}) 扫描指定包

github：https://github.com/crisy0513/SpringBootStudy