关于redis报错SerializationException的两个值得注意的地方

àì夳堔傛蜴生んèń 2022-01-10 16:57 443阅读 0赞

整合redis时，遇到序列化异常，报错信息如下：

org.springframework.data.redis.serializer.SerializationException: Cannot deserialize; nested exception is org.springframework.core.serializer.support.SerializationFailedException: Failed to deserialize payload. Is the byte array a result of corresponding serialization for DefaultDeserializer?; nested exception is java.io.InvalidClassException: com.zgw.tmall.pojo.Category; class invalid for deserialization
    at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.deserialize(JdkSerializationRedisSerializer.java:82)
    at org.springframework.data.redis.cache.RedisCache$CacheValueAccessor.deserializeIfNecessary(RedisCache.java:477)
    at org.springframework.data.redis.cache.RedisCache.lookup(RedisCache.java:323)
    at org.springframework.data.redis.cache.RedisCache.get(RedisCache.java:184)
    at org.springframework.data.redis.cache.RedisCache.get(RedisCache.java:133)
    at org.springframework.cache.interceptor.AbstractCacheInvoker.doGet(AbstractCacheInvoker.java:71)
    at org.springframework.cache.interceptor.CacheAspectSupport.findInCaches(CacheAspectSupport.java:536)
    at org.springframework.cache.interceptor.CacheAspectSupport.findCachedItem(CacheAspectSupport.java:502)
    at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:388)
    at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:326)
    at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:61)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673)
    at com.zgw.tmall.service.CategoryService$$EnhancerBySpringCGLIB$$9b0a286f.list(<generated>)
    at com.zgw.tmall.interceptor.OtherInterceptor.postHandle(OtherInterceptor.java:42)
    at org.springframework.web.servlet.HandlerExecutionChain.applyPostHandle(HandlerExecutionChain.java:151)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:974)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

百度了下大概是因为没有实现`Serializable`接口,因为Spring会将对象先序列化再存入 Redis,查看我自己的代码确实是没有实现的。

public class Category implements Serializable

加上后重新启动项目，页面没有显示数据，查看后台日志显示异常：

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request 
    processing failed; nested exception is org.springframework.data.redis.serializer.
    SerializationException: Could not read JSON: 
    Unrecognized field "hasContent" 
    (class tmall_springboot.syl.util.Page4Navigator), not marked as ignorable (13 
    known properties: "totalPages", "size", "isHasNext", "isHasPrevious", "number", "navigatepageNums", "first", 
    "navigatePages", "last", "numberOfElements", "content", "totalElements", "isHasContent"])

仔细查看代码，发现`Page4Navigator`中布尔类型变量定义如图示：

boolean isHasNext;
    
    boolean isHasPrevious;

参考阿里巴巴开发手册第八条：  
![在这里插入图片描述][20190620010943910.png]  
再将is开头的几个属性，修改为了非is开头之后，就没有这个问题了。

//是否有下一页
        private boolean hasNext;
     
        //是否有上一页
        private boolean hasPrevious;

[20190620010943910.png]: /images/20220110/5120be8836894f7c943fce53a7ef4be1.png