Mybatis学习笔记-动态SQL与模糊查询

public class User {
private int id;
private String name;
private int age;
//...
}

public class ConditionUser {
private String name;
private int minAge;
private int maxAge;
//...
}

<!--
实现多条件查询用户(姓名模糊匹配, 年龄在指定的最小值到最大值之间)
类似jstl表达式
-->
<select id="getUser" parameterType="com.mybatis.test05.ConditionUser" resultType="com.mybatis.test05.User">
select * from d_user where

<if test='name != "%null%"'>
name like #{name} and
</if>

age between #{minAge} and #{maxAge}
</select>

SqlSessionFactory factory = MybatisUtil.getFactory();
SqlSession session = factory.openSession();
String statement = "com.mybatis.test05.userMapper.getUser";
String name = "o";
name = null;
ConditionUser parameter = new ConditionUser("%"+name+"%", 13, 18);
List<User> list = session.selectList(statement, parameter);
System.out.println(list);
session.close();