springboot入门案例

Posted 2021-05-07 itheima-wsy

一、引入依赖

1.springboot项目必须继承springboot父工程

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-parent</artifactId>
    <version>1.5.9.RELEASE</version>
</parent>

2.springboot开发web项目，所需要的依赖（也叫场景启动器）　

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

　项目的pom.xml文件

<?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.company</groupId>
    <artifactId>springbootDemo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-parent</artifactId>
        <version>1.5.9.RELEASE</version>
    </parent>

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

　二、编写配置文件application.properties(可以不写任何东西)

三、创建相关类
　　如上图
　　IndexController类
　

package com.company.hf.controller;

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

/**
 * @Author wangsy
 * @Date 2019/10/9 15:16
 **/
@RestController
public class IndexController {

    @GetMapping("/index")
    public String hello(){
        return "hello";
    }
}

　　BootApplication类是该项目的启动类

package com.company.hf;

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

/**
 * @Author wangsy
 * @Date 2019/10/9 15:16
 **/
@SpringBootApplication    
public class BootApplication {

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