mybatis-mybatis二级缓存的配置

SqlMapConfig.xml的配置：(默认为true)

<settings><!-- 打开延迟加载的开关 --><setting name="lazyLoadingEnabled" value="true"/><!-- 将积极加载改为消极加载，即按需加载 --><setting name="aggressiveLazyLoading" value="false"/><!-- 开启二级缓存 --><setting name="cacheEnabled" value="true"/></settings>

mapper.xml的配置：

返回的pojo类要实现序列化接口：

二级缓存测试：

package com.itcast.mybatis.test;import java.io.IOException;import java.io.InputStream;import java.util.List;import org.apache.ibatis.io.Resources;import org.apache.ibatis.session.SqlSession;import org.apache.ibatis.session.SqlSessionFactory;import org.apache.ibatis.session.SqlSessionFactoryBuilder;import com.itcast.mybatis.mapper.new_po_mapper;import com.itcast.mybatis.newpo.new_po;import com.itcast.mybatis.po.orderdetail;import com.itcast.mybatis.po.orders;import com.itcast.mybatis.po.users;public class Test {public static void main(String []args) throws IOException{InputStream inputStream=Resources.getResourceAsStream("SqlMapConfig.xml");SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream); SqlSession sqlSession=sqlSessionFactory.openSession();new_po_mapper New_po_mapper=sqlSession.getMapper(new_po_mapper.class);users user=New_po_mapper.findUserById(1);System.out.println(user.getUsername());sqlSession.close();SqlSession sqlSession1=sqlSessionFactory.openSession();new_po_mapper New_po_mapper1=sqlSession1.getMapper(new_po_mapper.class);users user1=New_po_mapper1.findUserById(1);System.out.println(user1.getUsername());sqlSession.close();}}