mybatis 缓存的简单配置
mybatis-config.xml配置<settings>
<setting name="cacheEnabled" value="true"/>
</settings>
默认为false,这里需要设置为true
同时将PersonMapper.xml中添加
<cache></cache>
同时将Person javabean 实现Serializable接口，注意比须实现，不然会出现异常.
测试如下：
package com.mybatis.test;
import java.io.InputStream;
import java.util.List;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import com.mybatis.dao.PersonMapper;
import com.mybatis.domain.Person;
public class PersonTest {
private static SqlSessionFactory factory ;
static{
InputStream in = PersonTest.class.getClassLoader().getResourceAsStream("mybatis-config.xml");
factory = new SqlSessionFactoryBuilder().build(in,"test1");
}
public static void main(String args[]){
SqlSession session = factory.openSession();
PersonMapper personMapper = session.getMapper(PersonMapper.class);
Person person = new Person();
person.setName("jysemel");
List<Person> list = personMapper.selectPerson("jysemel");
System.out.println(list.get(0).getName()+"==================");
session.commit();
session.close();
SqlSession session1 = factory.openSession();
PersonMapper personMapper1 = session1.getMapper(PersonMapper.class);
person.setName("jysemel");
System.out.println(personMapper = personMapper1);
List<Person> list1 = personMapper1.selectPerson("jysemel1");
System.out.println(list1.size()+"***********************");
session1.commit();
session1.close();
}
}
注意：所谓缓存，只有当前session关闭之后，重启开启session，才能看出缓存的作用
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