SpringBoot的helloword

1.创建一个Maven工程

在pom.xml中添加一下依赖

    <!-- Inherit defaults from Spring Boot -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
    </parent>

    <!-- Add typical dependencies for a web application -->
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

2.编写一个主程序，启动spring boot应用

package com.example;

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

/**
 * SpringBootApplication标注一个主程序类，说明这是一个spring boot应用程序
 */
@SpringBootApplication
public class HelloWordMainAppliaction {
    public static void main(String [] args){
        // SpringApplication.run这个方法使spring启动起来
        SpringApplication.run(HelloWordMainAppliaction.class,args);
    }
}

3.编写相关的controller service

package com.example.Controller;

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

@Controller
public class HelloWordController {
    @RequestMapping("/hello")
    @ResponseBody
    public String hello(){
        return "HelloWord 你好";
    }
}

4.运行主程序，会自动配置tomcat。

5.访问页面（谷歌浏览器）

　　localhost:8080/hello