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最详细，最易懂，一步一步执行搭建的框架~

话不多说，直接开始搭建吧~

目录

一、创建项目 

  1.点击创建新项目

  2.选择Spring Initializr     

   3.填写好项目的相关信息

  4.选择用到的依赖（也可以后期在pom.xml中添加）

  5.选择项目存放位置和设置项目名称

  6.创建成功后项目的初步结构

   7.pom.xml中依赖(添加了一点）

   
   	
    
     4.0.0
    	
    		
     
      org.springframework.boot
     		
     
      spring-boot-starter-parent
     		
     
      2.3.1.RELEASE
     		
      
     	
    	
    
     com.example
    	
    
     demo
    	
    
     0.0.1-SNAPSHOT
    	
    
     demo
    	
    
     Demo project for Spring Boot
    	
    		
     
      1.8
     	
    	
    		
     			
      
       org.springframework.boot
      			
      
       spring-boot-starter-jdbc
      		
     		
     			
      
       org.mybatis.spring.boot
      			
      
       mybatis-spring-boot-starter
      			
      
       2.1.3
      		
     		
     			
      
       mysql
      			
      
       mysql-connector-java
      			
      
       runtime
      		
     		
     			
      
       org.springframework.boot
      			
      
       spring-boot-starter-test
      			
      
       test
      			
      				
       					
        
         org.junit.vintage
        					
        
         junit-vintage-engine
        				
       			
      		
     		
     			
      
       com.alibaba
      			
      
       fastjson
      			
      
       1.2.35
      		
     		
     			
      
       org.springframework.boot
      			
      
       spring-boot-starter-web
      			
      
       2.3.1.RELEASE
      		
     	
    	
    		
     			
      				
       
        org.springframework.boot
       				
       
        spring-boot-maven-plugin
       			
      		
     		
     			
      				
       
        src/main/
       				
       					
        
         **/*.xml
        				
       			
      			
      				
       
        src/main/resources
       				
       					
        
         **/*.*
        				
       			
      		
     	
    
   

二、修改结构以及创建具体内容

   1.点击File -->  Project Structure..

  2.将main中java文件设为Sources，resources设为Resources，test中java设为Tests。

  3.创建controller、service、dao、entity包

  4.在resources中创建mappers文件来存放mapper.xml配置文件

  5.创建mapper.xml配置文件：右键 --> New --> File

  6.填入配置文件名称 例如：UserMapper.xml

  8.默认的springboot配置文件application是.properties格式，我习惯用.yml格式，所以修改一下

  9.将properties替换为yml

  10.配置application.yml

spring:       datasource:         url: jdbc:mysql://localhost:3306/seven?characterEncoding=utf8&useSSL=true&serverTimezone=Asia/Shanghai         username: root         password: root         driver-class-name: com.mysql.cj.jdbc.Drivermybatis:  mapper-locations: classpath:/resources/mappers/*.xml  type-aliases-package: com.example.demo.daoserver:    port: 8080    servlet:          context-path: /demo

    11. 配置DemoApplication运行文件

package com.example.demo;import org.mybatis.spring.annotation.MapperScan;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication@MapperScan("com.example.demo.dao")//加上这句，运行项目时候要去扫描mybatis的接口文件public class DemoApplication {	public static void main(String[] args) {		SpringApplication.run(DemoApplication.class, args);	}}

三、连接数据库，使用mybatis，以写上传用户信息的接口为例。

  1.数据库中创建user表。

  2.entity包中创建User实体类

package com.example.demo.entity;public class User {    private int    userID;     //用户ID    private String userName;   //用户名    private int    userAge;    //用户年龄    public User() {    }    public User(int userID, String userName, int userAge) {        this.userID = userID;        this.userName = userName;        this.userAge = userAge;    }    public int getUserID() {        return userID;    }    public void setUserID(int userID) {        this.userID = userID;    }    public String getUserName() {        return userName;    }    public void setUserName(String userName) {        this.userName = userName;    }    public int getUserAge() {        return userAge;    }    public void setUserAge(int userAge) {        this.userAge = userAge;    }    @Override    public String toString() {        return "User{" +                "userID=" + userID +                ", userName='" + userName + '\'' +                ", userAge=" + userAge +                '}';    }}

  3.配置文件UserMapper.xml中

   
       
    
             INSERT  INTO user VALUES        (#{userID,jdbcType=INTEGER},#{userName,jdbcType=VARCHAR},		#{userAge,jdbcType=INTEGER})    
    
   

  4.dao包中的UserMapper

package com.example.demo.dao;import com.example.demo.entity.User;public interface UserMapper {    int insertUserInfo(User user);}

  5.service中的UserService

package com.example.demo.service; import com.example.demo.dao.UserMapper;import com.example.demo.entity.User;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;@Servicepublic class UserService {    @Autowired(required = false)    private UserMapper userMapper;    public int AddUserInfo(int ID,String name,int age) {        User user = new User();        user.setUserID(ID);        user.setUserName(name);        user.setUserAge(age);        int res = userMapper.insertUserInfo(user);        if(res>0)return 1;  //上传成功        else return 0;   //上传失败    }}

  6.controller中的UserController

package com.example.demo.controller;import com.example.demo.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.*;@Controllerpublic class UserController {    @Autowired    private UserService userService;    //上传用户信息    @GetMapping("/AddUserInfo")    @ResponseBody    public int AddUserInfo(@RequestParam("userID")int userID,                           @RequestParam("userName")String userName,                           @RequestParam("userAge")int userAge){        int res = userService.AddUserInfo(userID,userName,userAge);        return res;    }}

四、调用接口，上传数据

查看数据库user表中，数据也插入了。

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