Spring boot整合mybatis-plus

1.引入依赖

      
         com.baomidou
         mybatis-plus-boot-starter
         3.4.0
      

2.编写配置文件

# 数据源环境
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql:///javatest?serverTimezone=UTC
    username: root
    password: 123456
#  profiles:
#    active: dev  # 分支配置
mybatis:
  mapper-locations: classpath:mapper/*.xml  # mapper文件位置设置
  type-aliases-package: cn.kgc.springboot.springboot.entity #类的别名设置
  configuration:
    map-underscore-to-camel-case: true  # 开启驼峰命名
logging:
  level:
    root: info # 全局的日志级别
    cn.kgc.springboot.mapper: debug  # 设置包的日志等级 debug

3.编写Mapper 文件 继承BaseMapper类

package cn.kgc.springboot.springboot.mapper;

import cn.kgc.springboot.springboot.entity.SysUser;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.apache.catalina.User;

/*
@author peng
@date20/7/2022
*/
public interface UserMapper extends BaseMapper {
}

4.测试

package cn.kgc.springboot.springboot;

import cn.kgc.springboot.springboot.entity.SysUser;
import cn.kgc.springboot.springboot.mapper.UserMapper;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import java.util.List;

@SpringBootTest
class Springboot02ApplicationTests {
    @Autowired
    private UserMapper userMapper;

    @Test
    void contextLoads() {
        List sysUsers = userMapper.selectList(null);
        sysUsers.forEach(sysUser -> System.out.println("sysUser = " + sysUser));
    }

}

5.运行结果