SpringBoot整合MyBatis Plus实现基本CRUD与高级功能

<!-- MyBatis Plus -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.4.3</version>
</dependency>

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/testdb?useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC
    username: your_username
    password: your_password

mybatis-plus:
  mapper-locations: classpath:mapper/**/*.xml
  global-config:
    db-config:
      id-type: auto
  configuration:
    map-underscore-to-camel-case: true

import com.baomidou.mybatisplus.annotation.*;
import lombok.Data;

import java.util.Date;

@Data
@TableName("user")
public class User {

    @TableId(type = IdType.AUTO)
    private Long id;

    private String username;

    private String password;

    private Integer age;

    @TableField(fill = FieldFill.INSERT)
    private Date createTime;

    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Date updateTime;

    @TableLogic
    private Integer deleted;
}

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface UserMapper extends BaseMapper<User> {
}

import com.baomidou.mybatisplus.extension.service.IService;

public interface UserService extends IService<User> {
}

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping("/{id}")
    public User getUser(@PathVariable Long id) {
        return userService.getById(id);
    }

    @GetMapping("/list")
    public List<User> listUsers() {
        return userService.list();
    }

    @PostMapping
    public void addUser(@RequestBody User user) {
        userService.save(user);
    }

    @PutMapping
    public void updateUser(@RequestBody User user) {
        userService.updateById(user);
    }

    @DeleteMapping("/{id}")
    public void deleteUser(@PathVariable Long id) {
        userService.removeById(id);
    }
}

@TableField(fill = FieldFill.INSERT)
private Date createTime;

@TableField(fill = FieldFill.INSERT_UPDATE)
private Date updateTime;

@Version
private Integer version;

@TableLogic
private Integer deleted;

LambdaQueryWrapper<User> wrapper = Wrappers.<User>lambdaQuery()
    .eq(User::getUsername, "admin")
    .like(User::getPassword, "pass");
List<User> userList = userService.list(wrapper);

IPage<User> page = new Page<>(1, 10);
IPage<User> userPage = userService.page(page, null);
List<User> userList = userPage.getRecords();

# application.yml
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl