测试代码区:
ConditionUser 类的{
private String name;
private int minAge;
private int maxAge;
}
SqlSession session=MyBatisUtils.getSession();
String statement="com.day03_mybaits.test7.userMapper.getUser";
String name="o";
//如果name=null的处理办法,在xml中
name=null;
ConditionUser prameter=new ConditionUser("%"+name+"%", 13, 18);
//Classes classes=session.selectOne(statement,prameter);
List<User>list=session.selectList(statement, prameter);
System.out.println(list);
配置文件中的实现:
<!-- 实现多条件查询用户(姓名模糊匹配,年龄在指定的最小值和最大值之间) -->
<select id="getUser" parameterType="_ConditionUser" resultType="_User" >
select * from d_user where
<if test=‘name!="%null%"‘>
<!--必须加上and要么会报错 -->
name like #{name} and
</if>
age between #{minAge} and #{maxAge}
</select>
时间: 2024-12-28 17:24:43