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