SpringBoot整合Mybatis注解开发的实现代码
作者：Breeze_4379
这篇文章主要介绍了SpringBoot整合Mybatis注解开发的实现代码,本文给大家介绍的非常详细，对大家的学习或工作具有一定的参考借鉴价值，需要的朋友可以参考下
官方文档：
https://mybatis.org/mybatis-3/zh/getting-started.html
SpringBoot整合Mybatis 引入maven依赖
（IDEA建项目的时候直接选就可以了）
<dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.4</version> </dependency>
配置application.yml文件
server: port: 8144 spring: #redis redis: host: 127.0.0.1 port: 6379 password: 123456 timeout: 3000 datasource: username: root password: root driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://localhost:3306/hellomybatis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
建实体类、Controller类、Service类 实体类
package com.example.mybatisDemo.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
private long id;
private String name;
private String pwd;
}
Controller类
package com.example.mybatisDemo.controller;
import com.example.mybatisDemo.entity.User;
import com.example.mybatisDemo.service.UserService;
import org.springframework.web.bind.annotation.*;
import java.util.*;
@RestController
@RequestMapping("api/user")
public class UserController {
private final UserService userService;
public UserController(UserService userService) {
this.userService = userService;
}
@GetMapping()
public List<User> getAllUsers(){
return userService.getUsers();
}
@DeleteMapping("{id}")
public int deleteUser(@PathVariable long id){
return userService.deleteUser(id);
}
@PostMapping
public int saveUser(@RequestBody User user){
return userService.insertUser(user);
}
@PutMapping
public int updateUser(@RequestBody User user){
return userService.updateUser(user);
}
@GetMapping("{id}")
public User getUser(@PathVariable long id){
return userService.getUser(id);
}
}
Service类
package com.example.mybatisDemo.service;
import com.example.mybatisDemo.entity.User;
import com.example.mybatisDemo.repository.UserRepository;
import org.springframework.stereotype.Service;
import java.util.*;
@Service
public class UserService {
private final UserRepository userRepository;
public UserService(UserRepository userRepository) {
this.userRepository = userRepository;
}
public List<User> getUsers(){
return userRepository.getUsers();
}
public int deleteUser(long id){
return userRepository.deleteUser(id);
}
public User getUser(long id){
return userRepository.getUser(id);
}
public int updateUser(User user){
return userRepository.updateUser(user);
}
public int insertUser(User user){
return userRepository.addUser(user);
}
}
建Repository类
package com.example.mybatisDemo.repository;
import com.example.mybatisDemo.entity.User;
import org.apache.ibatis.annotations.*;
import org.springframework.stereotype.Repository;
import java.util.*;
/**
* Mapper注解能省去以前复杂的xml配置，直接用注解写sql语句
* 不添加Repository注解依赖注入会报错（不影响运行），强迫症还是加上吧
*/
@Mapper
@Repository
public interface UserRepository {
@Select("select * from user")
List<User> getUsers();
@Delete("delete from user where id = #{id}")
int deleteUser(long id);
@Insert("insert into user(id,name,pwd) values (#{id},#{name},#{pwd})")
int addUser(User user);
@Update("update user set name=#{name},pwd=#{pwd} where id = #{id}")
int updateUser(User user);
@Select("select * from user where id = #{id}")
User getUser(long id);
}
然后直接调用即可
这里有个问题，使用注解开发的话sql语句全写在注解里，那么如果要实现批量更新插入要怎么写呢，目前还没解决，找到办法再更
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