用idea写一个springboot的小demo(手动添加依赖)

1 创建一个maven项目

2.添加pom.xml的依赖

   <!-- Spring boot 父引用-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
    </parent>

    <dependencies>

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

3.编写一个springboot启动类

package com.yt;

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

/**
 * @SpringBootApplication 来标注一个主程序类,说明这是一个springboot应用
 */
@SpringBootApplication
public class HelloWorldApplication {

    public static void main(String[] args) {

        //spring应用启动起来
        SpringApplication.run(HelloWorldApplication.class,args);

    }

}

4.编写一个controller

package com.yt.controller;

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

@Controller
public class HelloController {

    @ResponseBody
    @RequestMapping("/hello")
    public String hello(){
         return "hello yt";
    }

}

5.run 运行启动类

6.测试:http://localhost:8080/hello