1. 明确开发环境

Spring Tool Suite 
Version: 3.9.2.RELEASE

2. 创建Maven项目

File–>New–>Maven Project

在这里插入图片描述

3.配置pom.xml文件

在pom.xml文件中进行以下修改：

<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.iamapsycho</groupId>      
  <artifactId>SpringBootTest</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>
  
  <name>billingBootTest-iamapsycho</name>
  <description>Demo project for Spring Boot</description>
  
  <!--   
	spring-boot-starter-parent是Spring Boot的核心启动器，
	包含了自动配置、日志和YAML等大量默认的配置，大大简化了我们的开发。
	引入之后相关的starter引入就不需要添加version配置，
   	spring boot会自动选择最合适的版本进行添加。
   -->
  <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.5.9.RELEASE</version>
  </parent>

  <dependencies>
	  <!-- spring-boot-starter-web包含了Spring Boot预定义的一些Web开发的常用依赖包
		如: spring-webmvc,Tomcat.... -->
      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
      
      <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
      </dependency>
  </dependencies>

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

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

4.创建 Application.java 启动类

在src/main/java下创建包com.iamapsycho，并在包内创建Application.java

package com.iamapsycho;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

5.创建HelloWorld的Controller类

在src/main/java下创建包com.iamapsycho.controller，并在包内创建HelloWorldController.java

package com.iamapsycho.controller;

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

@Controller
public class HelloWorldController {
	
	@ResponseBody
	@RequestMapping("/helloworld")
	public String helloWorld(){
	    return "Hello World! This is Spring Boot !!!";
	}
}