Implementation of a program idea springboot

1. Preparing the Environment

JDK：1.8
Apache Maven: 3.6.1
IntelliJ IDEA 2019.1.3 x64
SpringBoot 1.5.9.RELEASE：1.5.9；

1.1, MAVEN set: to profiles of the label maven settings.xml configuration file to add

<profile>
  <id>jdk-1.8</id>
  <activation>
    <activeByDefault>true</activeByDefault>
    <jdk>1.8</jdk>
  </activation>
  <properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
  </properties>
</profile>

2. To achieve SpringBoot Helloworld Case

Hello browser sends a request, the server accepts and processes the request, response Hello World string;

2.1, create a maven project; (jar)

2.2, introducing spring boot related dependencies

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

3, write a main program; launch applications Spring Boot


package com.xdr;

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

/*
@SpringBootApplication 来标注一个主程序
 */
@SpringBootApplication
public class HelloWorldApplication {
    public static void main(String[] args) {
        System.out.println("启动springboot程序");
        SpringApplication.run(HelloWorldApplication.class, args);
    }
}

4, related to the preparation Controller, Service

package com.xdr.com.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class Controller {
    @RequestMapping("hello")
    public String sayHello(){
        return "Hello SpringBoot";
    }
}

5, the main program to run test

Create a file written in the resource application.properties

server.port=8082

The port number was changed to 8082, so as not to conflict with the 8080
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Access Project

6, simplified deployment

 <!-- 这个插件，可以将应用打包成一个可执行的jar包；-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

This application will be labeled jar package, the direct use of java -jar xxx.jar (xxx represents the name of the jar package) command execution;
comes packaged in Maven idea
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Refresh Project: