使用ehcache-spring-annotations使得在工程中简单配置即可使用缓存
下载地址：http://code.google.com/p/ehcache-spring-annotations/
需要的jar包，首先需要的是我们之前做SpringMVC时的各个Spring的jar包
然后需要把ehcache-spring-annotations-1.2.0文件夹内lib内的，非spring的jar加进去，因为我们已经增加了我们版本的spring
然后还需要动态代理的cglib包
在spring主配置文件中配置ehcache注解的使用：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:ehcache="http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring
http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring/ehcache-spring-1.1.xsd">
<ehcache:annotation-driven cache-manager="ehCacheManager" />
<bean id="ehCacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
<property name="configLocation" value="classpath:ehcache.xml"/>
</bean>
<bean id="sacheService" class="test.CacheService"></bean>
</beans>
配置缓存配置文件ehcache.xml，改文件放在SRC下：
<?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">
<diskStore path="java.io.tmpdir" />
<defaultCache eternal="false" maxElementsInMemory="1000"
overflowToDisk="false" diskPersistent="false" timeToIdleSeconds="0"
timeToLiveSeconds="600" memoryStoreEvictionPolicy="LRU" />
<cache name="testCache" eternal="false" maxElementsInMemory="100"
overflowToDisk="false" diskPersistent="false" timeToIdleSeconds="0"
timeToLiveSeconds="300" memoryStoreEvictionPolicy="LRU" />
</ehcache>
CacheService是示例类，代码如下：
package test;
import java.util.Date;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import com.googlecode.ehcache.annotations.Cacheable;
import com.googlecode.ehcache.annotations.TriggersRemove;
public class CacheService{
@SuppressWarnings("deprecation")
@Cacheable(cacheName = "testCache")
public String getName(String code){
System.out.println("查询编号：" + code);
return new Date().toLocaleString() + "-->" + code;
}
@SuppressWarnings("deprecation")
@Transactional(propagation = Propagation.REQUIRED)
public String update(String code){
System.out.println("更新编号：" + code);
return new Date().toLocaleString() + "-->" + code;
}
@TriggersRemove(cacheName="testCache",removeAll=true)
public void flush(){
System.out.println("情况缓存");
System.out.println("Processing testFlushing");
}
}
改类包含根据参数获取缓存值，更新缓存，情况缓存，都是使用注解标签实现。
Action类需要改动一下，代码如下：
package test;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
// http://localhost:8080/spring/hello.do?key=1&code=java
@org.springframework.stereotype.Controller
public class HelloController{
private CacheService sacheService;
@SuppressWarnings("deprecation")
@RequestMapping("/hello.do")
public String hello(HttpServletRequest request,HttpServletResponse response){
String key = request.getParameter("key");
if("1".equals(key)){
request.setAttribute("message", sacheService.getName(request.getParameter("code")));
}else if("2".equals(key)){
request.setAttribute("message", sacheService.update(request.getParameter("code")));
}else{
sacheService.flush();
request.setAttribute("message", sacheService.getName(request.getParameter("code")));
}
return "hello";
}
public CacheService getSacheService() {
return sacheService;
}
@Autowired
public void setSacheService(CacheService sacheService) {
this.sacheService = sacheService;
}
}
根据key做不同的操作，然后分别访问以下几个路径，为了方便看效果和学习，我把工程代码放到了附件：
第一次没有缓存
http://localhost:8080/spring/hello.do?key=1&code=java
读取缓存
http://localhost:8080/spring/hello.do?key=1&code=java
更新缓存
http://localhost:8080/spring/hello.do?key=2&code=java
读取最新缓存
http://localhost:8080/spring/hello.do?key=1&code=java
情况缓存
http://localhost:8080/spring/hello.do?key=3
