👍 👎 💯 👏 🔔 🎁 ❓ 💣 ❤️ ☕️ 🌀 🙇 💋 🙏 💦 💩 ❗️ 💢
————————————————
文章目录
知识点
万能的Map
- 假设,我们的实体类,或者数据库中的表,字段或者参数过多,我们应当考虑使用Map
//万能的Map
int addUser2(Map<String,Object> map);
<!--对象中的属性可以直接取出来-->
<insert id="addUser2" parameterType="map">
insert into mybatis.user(id ,name, pwd) values(#{userid},#{userName},#{passWord});
</insert>
@Test
public void addUser2(){
SqlSession sqlSession = MybatisUtils.getSqlSession();
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
Map<String,Object> map = new HashMap<>();
map.put("userid",5);
map.put("userName","Hello");
map.put("passWord","222333");
mapper.addUser2(map);
sqlSession.commit();
sqlSession.close();
}
模糊查询怎么写
- java代码执行的时候,传递通配符% %
List<User> getUserLike(String value);
<select id="getUserLike" resultType="com.kuang.pojo.User">
select * from user where name like #{value}
</select>
@Test
public void getUserLike(){
SqlSession sqlSession = MybatisUtils.getSqlSession();
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
List<User> userList = mapper.getUserLike("李%");
for (User user:userList) {
System.out.println(user);
}
sqlSession.close();
}
先赞后看,养成习惯!!!^ _ ^♥♥♥
每天都更新知识点哦!!!
码字不易,大家的支持就是我坚持下去的动力。点赞后不要忘记关注我哦!