springBoot+mybatis
目录
一、目录结构
二、依赖
三、代码及注释记录
1、controller
2、entity的User
3、mapper下的UserMapper
4、UserService
5、Impl
6、Usermapper.xml
7、application.properties
8、请求
一、目录结构
二、依赖，pom.xml
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.7.11
com.example
ie
0.0.1-SNAPSHOT
ie
ie
8
org.springframework.boot
spring-boot-starter-web
com.mysql
mysql-connector-j
runtime
org.projectlombok
lombok
true
org.springframework.boot
spring-boot-starter-test
test
com.alibaba
easyexcel
2.1.6
org.mybatis.spring.boot
mybatis-spring-boot-starter
2.2.0
org.springframework.boot
spring-boot-maven-plugin
2.7.11
org.projectlombok
lombok
三、代码及注释记录
1、controller
package com.example.ie.controller;
import com.example.ie.entity.User;
import com.example.ie.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
/**
* @Description: $
* @Date: $
* @Param: $
* @return: $
*/
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/getUser/{userid}")
@ResponseBody
public String getUserData(@PathVariable Integer userid){
User user = userService.queryUserById(userid);
return user.toString();
}
}
浏览器路径请求样例
http://localhost:8080/user/getUser/12、entity的User
package com.example.ie.entity;
import lombok.Data;
import org.springframework.context.annotation.Configuration;
/**
* @Description: $
* @Date: $
* @Param: $
* @return: $
*/
@Configuration
@Data
public class User {
private int userid;
private String username;
private String password;
public User() {
}
public User(int userid, String username, String password) {
this.userid = userid;
this.username = username;
this.password = password;
}
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 String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
3、mapper下的UserMapper
package com.example.ie.mapper;
import com.example.ie.entity.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.stereotype.Controller;
/**
* @Description: $
* @Date: $
* @Param: $
* @return: $
*/
//@Controller
@Mapper
public interface UserMapper {
User selectUser(@Param("userid") Integer userid);
}
4、UserService
package com.example.ie.service;
import com.example.ie.entity.User;
import org.springframework.stereotype.Service;
/**
* @Description: $
* @Date: $
* @Param: $
* @return: $
*/
public interface UserService {
User queryUserById(Integer userid);
}
5、Impl
package com.example.ie.service.impl;
import com.example.ie.entity.User;
import com.example.ie.mapper.UserMapper;
import com.example.ie.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
* @Description: $
* @Date: $
* @Param: $
* @return: $
*/
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;
@Override
public User queryUserById(Integer userid) {
User user = userMapper.selectUser(userid);
return user;
}
}
6、Usermapper.xml
id为UserMapper中的方法名，如下
//@Controller
@Mapper
public interface UserMapper {
User selectUser(@Param("userid") Integer userid);
}resultType为实体的全路径
7、application.properties
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/user?serverTimezone=UTC&characterEncoding=utf8&useSSL=false
spring.datasource.username=root
spring.datasource.password=123456
mybatis.mapper-locations=classpath:com.example.ie.mapper/*.xml
此处的mapper为自己mapper文件的路径
mybatis.mapper-locations=classpath:mapper/*.xml，
8、请求
http://localhost:8080/user/getUser/1