Spring @cache 不适用于没有参数的缓存列表

Question

您好，我在尝试缓存列表函数的结果时遇到问题 当我第一次调试它时，第二次调用该函数时，缓存什么也不返回一个空列表 我还尝试添加 key="'all'" 和方法名称，但什么也没回来

@Override
@Cacheable(value = "categories" )
public List<Category> getCategories() {
    // TODO Auto-generated method stub
    LOG.info("start getCategories");
    return repository.findAll(); //
}
@Configuration
@EnableCaching
public class CachingConfig implements CachingConfigurer {
@Bean(destroyMethod="shutdown")
public net.sf.ehcache.CacheManager ehCacheManager() {
     net.sf.ehcache.config.Configuration config = new net.sf.ehcache.config.Configuration();



    CacheConfiguration cacheConfigurationCategories = new CacheConfiguration();
    cacheConfigurationCategories.setName("categories");

    cacheConfigurationCategories.setMemoryStoreEvictionPolicy("LRU");
    cacheConfigurationCategories.setMaxEntriesLocalHeap(100);
    cacheConfigurationCategories.setMaxElementsOnDisk(100);
    config.addCache(cacheConfigurationCategories);

    return net.sf.ehcache.CacheManager.newInstance(config);
}

@Bean
@Override
public CacheManager cacheManager() {
    return new EhCacheCacheManager(ehCacheManager());
}

@Bean
@Override
public KeyGenerator keyGenerator() {
    return new SimpleKeyGenerator();
}

}

Answer 1

我只将它与xml中的配置一起使用，看起来像这样

    @Bean(name = "ehcache")
    public EhCacheManagerFactoryBean ehCacheManagerFactoryBean() {
        EhCacheManagerFactoryBean ehCacheManagerFactoryBean = new EhCacheManagerFactoryBean();
        ehCacheManagerFactoryBean.setConfigLocation(new ClassPathResource("ehcache.xml"));
        return ehCacheManagerFactoryBean;
    }

    @Bean
    public CacheManager cacheManager() {
        EhCacheCacheManager cacheManager = new EhCacheCacheManager();
        cacheManager.setCacheManager(ehCacheManagerFactoryBean().getObject());
        return cacheManager;
    }

使用以下xml

<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd">
    <diskStore path="java.io.tmpdir"/>

<cache name="cacheName"
       maxElementsInMemory="1000"
       eternal="false"
       timeToIdleSeconds="28800"
       timeToLiveSeconds="28800"
       overflowToDisk="false"
       maxElementsOnDisk="200"
       diskPersistent="false"
       diskExpiryThreadIntervalSeconds="120"
       memoryStoreEvictionPolicy="LRU"/>             

</ehcache>