本文转载自:http://blog.youkuaiyun.com/chaoowang/article/details/21236501
原处的ehcache.xml少添加了文件,也是进过错误信息看出的,加上了配置。
源码下载
hibernate使用版本是:hibernate-release-4.3.11.Final
需要的jar包:hibernate-release-4.3.11Final\lib\required下所有jar包
ehcache jar包:hibernate-release-4.3.11.Final\lib\optional\ehcache下所有包
junit:junit-4.12.jar和MySQL-connector-Java-5.1.39-bin.jar
注:hibernate 4.2.5版本ehcache缓存不依赖commons-logging-1.1.1.jar,需要的是slf4j-api-1.6.1.jar
hibernate.cfg.xml
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://127.0.0.1:3306/hibernate4cache</property>
<property name="connection.username">root</property>
<property name="connection.password">root</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<!--<property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
-->
<!-- 配置二级缓存 -->
<property name="hibernate.cache.use_second_level_cache">true</property>
<property name="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</property>
<!-- hibernate3的二级缓存配置 -->
<!-- <property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property> -->
<!-- 开启查询缓存 -->
<property name="hibernate.cache.use_query_cache">true</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">update</property>
<mapping class="com.zhenqi.pojo.User" />
</session-factory>
</hibernate-configuration>
ehcache.xml 特别要说明的是这个文件
<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
updateCheck="false">
<!--
name:cache唯一标识
eternal:缓存是否永久有效
maxElementsInMemory:内存中最大缓存对象数
overflowToDisk(true,false):缓存对象达到最大数后,将缓存写到硬盘中
diskPersistent:硬盘持久化
timeToIdleSeconds:缓存清除时间
timeToLiveSeconds:缓存存活时间
memoryStoreEvictionPolicy:缓存清空策略
1.FIFO:first in first out 先讲先出
2.LFU: Less Frequently Used 一直以来最少被使用的
3.LRU:Least Recently Used 最近最少使用的
-->
<defaultCache maxElementsInMemory="1000" eternal="false"
timeToIdleSeconds="120" timeToLiveSeconds="120" overflowToDisk="true" />
<cache name="com.zhenqi.pojo.User" eternal="false" maxElementsInMemory="1000"
overflowToDisk="false" diskPersistent="false" timeToIdleSeconds="3600"
timeToLiveSeconds="3600" memoryStoreEvictionPolicy="LFU" />
</ehcache>
User实体类
package com.zhenqi.pojo;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import org.hibernate.annotations.Cache;
import org.hibernate.annotations.CacheConcurrencyStrategy;
@Entity
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
private String name;
private int age;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
UserTest测试类:
package com.zhenqi.pojo;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.junit.BeforeClass;
import org.junit.Test;
public class UserTest {
private static SessionFactory sessionFactory = null;
@BeforeClass
public static void beforeClass() {
Configuration configuration = new Configuration();
try {
configuration.configure();
} catch (HibernateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties())
//.buildServiceRegistry();
StandardServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
.applySettings(configuration.getProperties()).build();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
}
@Test
public void testEhcache() {
Session session = sessionFactory.openSession();
session.beginTransaction();
User u1 = (User) session.load(User.class, 3);
System.out.println(u1.getName());
session.getTransaction().commit();
session.close();
Session session2 = sessionFactory.openSession();
session2.beginTransaction();
User u2 = (User) session2.load(User.class, 3);
System.out.println(u2.getName());
session2.getTransaction().commit();
session2.close();
}
@SuppressWarnings("unchecked")
@Test
public void testListEhcache() {
Session session = sessionFactory.openSession();
session.beginTransaction();
List<User> users1 = (List<User>) session.createQuery("from User").setCacheable(true).list();
for (User user : users1) {
System.out.println(user.getName());
}
session.getTransaction().commit();
session.close();
Session session2 = sessionFactory.openSession();
session2.beginTransaction();
List<User> users2 = (List<User>) session2.createQuery("from User").setCacheable(true).list();
for (User user : users2) {
System.out.println(user.getName());
}
session2.getTransaction().commit();
session2.close();
}
}
测试报错:
INFO: HHH000399: Using default transaction strategy (direct JDBC transactions)
十月 25, 2016 9:32:06 下午 org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
**SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.**
十月 25, 2016 9:32:06 下午 org.hibernate.cache.spi.UpdateTimestampsCache <init>
INFO: HHH000250: Starting update timestamps cache at region: org.hibernate.cache.spi.UpdateTimestampsCache
十月 25, 2016 9:32:06 下午 org.hibernate.cache.ehcache.AbstractEhcacheRegionFactory getCache
**WARN: HHH020003: Could not find a specific ehcache configuration for cache named [org.hibernate.cache.spi.UpdateTimestampsCache]; using defaults.**
而在ehcache。xml文件加入以下配置就可以了。
<cache name="org.hibernate.cache.spi.UpdateTimestampsCache"
maxElementsInMemory="5000"
eternal="true"
overflowToDisk="true" />
<cache name="org.hibernate.cache.internal.StandardQueryCache"
maxElementsInMemory="10000"
eternal="false"
timeToLiveSeconds="120"
overflowToDisk="true" />