Question

我有一个调用web服务的方法，对于相同的输入参数，我希望缓存结果。所以，这是我到目前为止所做的：主要课程：

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.web.SpringBootServletInitializer;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.ehcache.EhCacheCacheManager;
import org.springframework.cache.ehcache.EhCacheManagerFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.core.io.ClassPathResource;

@EnableCaching
@ComponentScan
@SpringBootApplication
public class AccServer extends SpringBootServletInitializer {

   @Bean
   public CacheManager cacheManager() {
      return new EhCacheCacheManager(ehCacheCacheManager().getObject());
   }

   @Bean
   public EhCacheManagerFactoryBean ehCacheCacheManager() {
      EhCacheManagerFactoryBean cmfb = new EhCacheManagerFactoryBean();
      cmfb.setConfigLocation(new ClassPathResource("ehcache.xml"));
      cmfb.setShared(true);
      return cmfb;
   }

}

缓存方法：

import java.util.List;

import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

@Service
public class SomeClass implements ISomeClass {

   @Override
   @Cacheable("acc")
   public List<Integer> trs() {
      return webSrv.trs();
   }

}

ehcache.xml中

<?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" />
    <cache name="acc" maxElementsInMemory="100" eternal="false" timeToIdleSeconds="120" timeToLiveSeconds="120" overflowToDisk="true" maxElementsOnDisk="10000000" diskPersistent="false" diskExpiryThreadIntervalSeconds="120" memoryStoreEvictionPolicy="LRU" />
</ehcache>

我得到了：

Caused by: java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy
    at sun.reflect.annotation.AnnotationParser.parseClassArray(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseArray(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseMemberValue(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotation2(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations(Unknown Source)
    at java.lang.Class.createAnnotationData(Unknown Source)
    at java.lang.Class.annotationData(Unknown Source)
    at java.lang.Class.createAnnotationData(Unknown Source)
    at java.lang.Class.annotationData(Unknown Source)
    at java.lang.Class.getAnnotation(Unknown Source)
    at org.springframework.cache.annotation.SpringCacheAnnotationParser.getAnnotations(SpringCacheAnnotationParser.java:201)
    at org.springframework.cache.annotation.SpringCacheAnnotationParser.parseCacheAnnotations(SpringCacheAnnotationParser.java:64)
    at org.springframework.cache.annotation.SpringCacheAnnotationParser.parseCacheAnnotations(SpringCacheAnnotationParser.java:52)
    at org.springframework.cache.annotation.AnnotationCacheOperationSource$1.getCacheOperations(AnnotationCacheOperationSource.java:113)
    at org.springframework.cache.annotation.AnnotationCacheOperationSource.determineCacheOperations(AnnotationCacheOperationSource.java:142)
    at org.springframework.cache.annotation.AnnotationCacheOperationSource.findCacheOperations(AnnotationCacheOperationSource.java:110)
    at org.springframework.cache.interceptor.AbstractFallbackCacheOperationSource.computeCacheOperations(AbstractFallbackCacheOperationSource.java:142)
    at org.springframework.cache.interceptor.AbstractFallbackCacheOperationSource.getCacheOperations(AbstractFallbackCacheOperationSource.java:97)
    at org.springframework.cache.interceptor.CacheOperationSourcePointcut.matches(CacheOperationSourcePointcut.java:39)
    at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:211)
    at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:248)
    at org.springframework.aop.support.AopUtils.findAdvisorsThatCanApply(AopUtils.java:280)
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findAdvisorsThatCanApply(AbstractAdvisorAutoProxyCreator.java:118)
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findEligibleAdvisors(AbstractAdvisorAutoProxyCreator.java:88)
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.getAdvicesAndAdvisorsForBean(AbstractAdvisorAutoProxyCreator.java:69)
    at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:346)
    at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:298)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:422)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1583)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
    ... 135 more

我还对应该为结果缓存的方法使用@Cacheable("acc")注释。任何答案都将不胜感激。

Answer 1

问题在于@Cacheable trs()方法（您的@Service SomeClass类）没有返回List<Integer>对象因为您正在获取sun.reflect.annotation.TypeNotPresentExceptionProxy例外。

您需要确保trs()正在返回List<Integer>对象。

Answer 2

感谢研究员们对这个问题的贡献，最后经过长时间的调试，我发现需要从项目中排除两个依赖项，以便它成为：

            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-actuator</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.apache.tomcat.embed</groupId>
                <artifactId>tomcat-embed-jasper</artifactId>
            </exclusion>
            <exclusion>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
            </exclusion>

Answer 3

该异常意味着尝试对类路径中不存在的注释进行查找。不幸的是，JDK并没有告诉我们太多关于它的信息，但我认为我们已经在最近版本的框架中改进了错误信息（因此启动了）。

您还可以在错误代码中添加断点，它会告诉您它正在尝试解决的问题。那应该会给你一个缺失注释的提示。大多数情况下，这与查找的组件并不严格相关（即它可能与缓存无关）。如果您共享示例应用程序，我们可以轻松搞清楚。

在Springboot和ehcache上获取java.lang.ArrayStoreException

3 个答案: