萬能的Map
當數據或者屬性很多的時候，可以選擇性的單獨改變密碼或者用戶名等等
UserMapper.java
int updateUserByMap(Map<String,Object> map);
UserMapper.xml
<insert id="addUser" parameterType="map">
insert into mybatis.user (id,name,pwd) values (#{id},#{name},#{pwd});
</insert>
test.java
@Test
public void addUser(){
SqlSession sqlSession = MybatisUtils.getSqlSession();
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
Map<String,Object> map = new HashMap<String, Object>();
map.put("id",7);
map.put("name","董");
map.put("pwd","123");
mapper.addUser(map);
sqlSession.commit();
sqlSession.close();
}
模糊查詢
UserMapper.java
List<User> getUserLike(String value);
UserMapper.xml
<select id="getUserLike" resultType="com.zou.pojo.User">
select * from mybatis.user where name like #{value}
</select>
test.java
@Test
public void getUserLike(){
SqlSession sqlSession = MybatisUtils.getSqlSession();
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
List<User> userList = mapper.getUserLike("%董%");
for(User user : userList){
System.out.println(user);
}
sqlSession.close();
}
結果如下：
注意：
1.Java程序運行時，傳遞通配符% %
依舊是喜歡丹丹的一天
