Hibernate中二级缓存的配置_hibernate缓存

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
	<session-factory>
		<property name="connection.username">root</property>
		<property name="connection.password">mysql</property>
		<property name="connection.url">jdbc:mysql://localhost/mysqldemo</property>
		<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
		<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="show_sql">true</property>
		<property name="format_sql">true</property>
		<!--自动在数据库中生成表
		<property name="hibernate.hbm2ddl.auto">create</property>
		-->
		
		<!-- 开启二级缓存 -->
		<property name="hibernate.cache.use_second_level_cache">true</property>
		<!-- 设置缓存提供者 -->
		<property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
		<!-- 查询缓存 -->
		<property name="hibernate.cache.use_query_cache">true</property>
		
		<!-- 映射文件 -->
		<mapping resource="pack/java/hibernate/mapping/User.hbm.xml"/>
		
		<!-- 指定哪些实体需要使用二级缓存,usage属性指定缓存的策略 -->
		<class-cache usage="read-only" class="pack.java.hibernate.pojo.User"/>
	</session-factory>
</hibernate-configuration>

<echcache>
	<diskStore path="java.io.tmpdir"/>
	<!-- 
		默认缓存配置;
		maxElementslnMemory 属性指定缓存中最多可以放多少个对象
		eternal 属性指定缓存是否永久有效
		timeToldleSeconds 属性指定缓存多久未被使用便清理掉
		timeToLiveSecods  属性指定缓存的生命长度
		diskPersistent 属性指定缓存是否被持久化硬盘中,保存路径由标签指定。
	 -->
	<defaultCache 
		maxElementslnMemory="10000"   
		eternal="false" 
		overflowToDisk="true" 
		timeToldleSeconds="120" 
		timeToLiveSecods="120" 
		diskPersistent="false" />
</echcache>

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
                                   "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
 <class name="pack.java.hibernate.pojo.User" table="User">
  <!-- 使用这种方式也可以应用缓存 
  	<cache usage="read-only"/>
  -->
  <id name="uid" column="UID" type="java.lang.Integer">
  	<generator class="identity"></generator>
  </id>
  <property name="uname" column="UNAME"></property>
  <property name="age" column="AGE"></property>
  <property name="address" column="ADDRESS"></property>
  <property name="sex" type="java.lang.Boolean">
  	<column name="SEX" sql-type="tinyint"></column>
  </property>
  <property name="remark" column="REMARK"></property>
 </class>
</hibernate-mapping>

public class User implements Serializable{
	private static final long serialVersionUID = 1628733968156346447L;
	private Integer uid;
	private String uname;
	private Integer age;
	private String address;
	private Boolean sex;
	private String remark;
        //getter和setter方式省略
}

/**
	 * 查询所有用户信息;
	 */
	@SuppressWarnings("unchecked")
	public List<User> queryUser() {
		// TODO Auto-generated method stub
		if(session==null){
			session = getSession();
		}
	    query = session.createQuery("from "+User.class.getName()+" u where u.uname in('100','101','102','103','104','105')");
		query.setCacheable(true);
		query.setFirstResult((0)*1000).setMaxResults(1000);
		List<User> list = query.list();
		for(User user:list){
			System.out.println("~~~~~~~~"+user.getUid()+","+user.getUname()+","+user.getSex()+","+user.getAddress());
		}
		session.close();
		
		if(!session.isOpen()){
			session = getSession();
		}
		User user = (User) session.get(User.class,  29145);
		query.setCacheable(true);
		System.out.println("~~~~~~~~"+user.getUid()+","+user.getUname()+","+user.getSex()+","+user.getAddress());
		session.close();
		return list;
	}