測試BaseMapper的功能

添加功能

/*** 實現新增用戶信息*/@Testpublic void testInsert(){User user = new User();user.setName("張三");user.setAge(23);user.setEmail("zhangsan@xx.com");int result = userMapper.insert(user);System.out.println("result = "+result);System.out.println("id = "+user.getId());}

刪除功能

/*** 通過id刪除用戶信息*/@Testpublic void testDelete(){int result = userMapper.deleteById(1499367002800951298L);System.out.println("result = "+result);}

/*** 通過map集合中設置的條件刪除用戶信息*/@Testpublic void testDelete01(){Map<String,Object> map = new HashMap<>();map.put("name","張三");map.put("age",23);int result = userMapper.deleteByMap(map);System.out.println("result = "+result);}

/*** 通過多個id實現批量刪除*/@Testpublic void testDelete02(){List<Long> list = Arrays.asList(1L, 2L, 3L);int result = userMapper.deleteBatchIds(list);System.out.println("result = "+result);}

修改功能

/*** 修改用戶信息* UPDATE user SET name=?, email=? WHERE id=?*/@Testpublic void testUpdate(){User user = new User();user.setId(4L);user.setName("李四");user.setEmail("lisi@xxx.com");int result = userMapper.updateById(user);System.out.println("result = "+result);}

查詢功能

/*** 通過id查詢用戶信息*/@Testpublic void testSelect(){User user = userMapper.selectById(1L);System.out.println(user);}

/*** 通過多個id查詢多個用戶信息*/@Testpublic void testSelect01(){List<Long> list = Arrays.asList(1L, 2L, 3L);List<User> users = userMapper.selectBatchIds(list);users.forEach(System.out::println);}

/*** 通過map中設置的條件查詢*/@Testpublic void testSelect02(){Map<String,Object> map = new HashMap<>();map.put("name","Jack");map.put("age",20);List<User> users = userMapper.selectByMap(map);}

/*** 查詢所有數據*/@Testpublic void testSelect02(){List<User> users = userMapper.selectList(null);users.forEach(System.out::println);}

自定義功能

不修改的話就采用mybatisplus的默認路徑

UserMapper

package com.xxxx.mybatisplus.mapper;import com.baomidou.mybatisplus.core.mapper.BaseMapper; import com.xxxx.mybatisplus.pojo.User; import org.springframework.stereotype.Repository;import java.util.Map;// 將類或者接口標記為持久層組件 這樣就不會看見test類中的紅線警告了 @Repository public interface UserMapper extends BaseMapper<User> {/*** 根據id查詢用戶信息為map集合* @param id* @return*/Map<String,Object> selectMapById(Long id);}

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.xxxx.mybatisplus.mapper.UserMapper"><!-- Map<String,Object> selectMapById(Long id);--><select id="selectMapById" resultType="map">select id,name,age,email from user where id = #{id}</select></mapper>

測試

@Testpublic void testSelect03(){Map<String,Object> map =userMapper.selectMapById(1L);System.out.println(map);}

總結

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