Hibernate 配置二级缓存-优快云博客

本文详细介绍了配置二级缓存的过程，包括POM.XML、Hibernate.cfg.xml的修改，以及ehcache.xml文件的配置。通过实例展示了如何在特定类中启用缓存，并成功获取缓存实例，突出了缓存对提高应用程序性能的重要作用。

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前几天配置了二级缓存，特此记录一下。

第一步：

添加POM.XML dependency

<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-ehcache</artifactId>
			<version>3.6.2.Final</version>
		</dependency>

第二步：

Hibernate.cfg.xml


<property name="hibernate.cache.use_second_level_cache">true</property>
		<property name="hibernate.cache.provider_class">
			org.hibernate.cache.EhCacheProvider
		</property>

第三步：
在需要缓存的class.hbm.xml 添加声明

 <class name="test" table="CMN_test" >

    	<cache usage="read-write"/>

        <id name="id" type="string">
            <column name="ID" length="50" />
            <generator class="assigned" />
        </id>

第三步：
编写ehcache.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--

Copyright 2011 Nicholas Blair, Eric Dalquist

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

-->

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd" updateCheck="false">

    <diskStore path="c:/ehcache" />

    <defaultCache eternal="false" maxElementsInMemory="1000"
        overflowToDisk="false" diskPersistent="false" timeToIdleSeconds="0"
        timeToLiveSeconds="600" memoryStoreEvictionPolicy="LRU" statistics="true" />

    <cache name="com.pulse.ipmanager.egress.CmnAnumberbypass" eternal="false" 
        maxElementsInMemory="100" overflowToDisk="false" diskPersistent="false"
        timeToIdleSeconds="50" timeToLiveSeconds="300"
        memoryStoreEvictionPolicy="LRU" statistics="true" />

 </ehcache>

最后检查一下：


getting CmnAnumberbypass instance with id: b5bd40a7-1330-4b0e-93a1-395ce84aaedd
2012-05-09 15:26:16,949 DEBUG (net.sf.ehcache.store.MemoryStore:135) - Cache: CmnAnumberbypassMemoryStore hit for CmnAnumberbypass#b5bd40a7-1330-4b0e-93a1-395ce84aaedd
2012-05-09 15:26:16,951 DEBUG (CmnAnumberbypassHome:123) - get successful, instance found