spring配置ehcache

<cache:annotation-driven cache-manager="cacheManager" /> 
    <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
        <property name="cacheManager" ref="ehcache"></property>
    </bean>
    <bean id="ehcache"
        class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
        <property name="configLocation" value="classpath:ehcache.xml"></property>
    </bean>

<?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="departCache" eternal="false" maxElementsInMemory="100"
        overflowToDisk="false" diskPersistent="false" timeToIdleSeconds="0"
        timeToLiveSeconds="300" memoryStoreEvictionPolicy="LRU" />

</ehcache>

import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
@Service
public class CacheServiceImpl implements CacheService{
    @Cacheable(value="departCache",key="#i")
    public String findUser(int i) {
        StringBuffer sb=new StringBuffer();
        int j=0;
        for(;j<i;j++){
            sb.append("hello"+i);
        }
        return sb.toString();
        
    }

}

@RunWith(SpringJUnit4ClassRunner.class)    
@ContextConfiguration("/application.xml")   
public class TestCache {   
   
   @Resource
   CacheServiceImpl cacheServiceImpl;
      
    @Test  
    public void testSend() {   
     System.out.println(System.currentTimeMillis());
       cacheServiceImpl.findUser(1000);
       System.out.println(System.currentTimeMillis());
       
       System.out.println(System.currentTimeMillis());
       cacheServiceImpl.findUser(1000);
       System.out.println(System.currentTimeMillis());
        
    
        
    }   
       
}