IDEA创建SpringBoot项目输出hello world——新手教程（1）

1. idea新建项目

2. 点击next
   
3. 点击next
   
4. 点击next
   
5. 点击finish，看是否和我生成的一样
   
6. 新建web入口类
   
7. 配置pom.xml，所有的依赖文件都在里面配置，比如数据库驱动
   `

    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        2.1.7.RELEASE
         
    
    com.shaotianyou
    springboot-first-project
    0.0.1-SNAPSHOT
    springboot-first-project
    Demo project for Spring Boot

    
        1.8
    

    
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            2.1.0
        

        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.springframework.boot
            spring-boot-starter-test
            test
        

        
            mysql
            mysql-connector-java
            5.1.25
        

        
            org.springframework.boot
            spring-boot-configuration-processor
            true
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

8. 配置aplication.properties文件

spring.datasource.url=jdbc:mysql://localhost:3306/schooltao?useUnicode=true&zeroDateTimeBehavior=convertToNull&autoReconnect=true
spring.datasource.username=xxx
spring.datasource.password=xxx
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

9. HelloWorld.java

package com.shaotianyou.springbootfirstproject;


import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;


@RestController
@Component
@RequestMapping("/springboot")
public class HelloWorld {

    @RequestMapping(value = "hello",method = RequestMethod.GET)
    public String sayHello(){
        return "Hello";
    }
}

启动项目
最后在地址栏上输入localhost:8080/springboot/hello就能够看到方法中返回的字符串