禁用mapper中某个方法使用缓存

配置sql映射文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--
    namespace：命名空间，它的作用就是对SQL进行分类化管理，可以理解为SQL隔离
    注意：使用mapper代理开发时，namespace有特殊且重要的作用
 -->

<mapper namespace="edu.ccit.cn.mapper.UserMapper">
    <!--
        Mybatis默认使用perpetualCache缓存对象 使用二级缓存需要实现cache接口，
        perpetualCache继承了接口
    -->
    <cache type="org.mybatis.caches.ehcache.EhcacheCache"></cache>
    <select id="findUserById" resultType="User">
        select * from user where id=#{?}
    </select>
    <select id="findUsers" resultType="User" useCache="false" >
        select * from user
    </select>
</mapper>

测试

@Test
    public void method03_Level2Cache(){
        SqlSession sqlSession = ssf.openSession();
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        List<User> users1 = mapper.findUsers();
        System.out.println(users1);
        sqlSession.close();

        SqlSession sqlSession1 = ssf.openSession();
        UserMapper mapper1 = sqlSession1.getMapper(UserMapper.class);
        List<User> users = mapper1.findUsers();
        System.out.println(users);
        sqlSession1.close();
    }