nested exception is org.springframework.data.redis.serializer.SerializationException: Cannot deseria

梦里梦外; 2023-08-17 16:38 47阅读 0赞

## ** 今天从reids中取值时报如下错误，显示没有反序列化器支撑redis的反序列化操作。** ##

29-Sep-2019 08:43:51.703 严重 [http-apr-8080-exec-4] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcherServlet] in context with path [/tour_war_exploded] threw exception [Request processing failed; nested exception is 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.lang.ClassCastException: cannot assign instance of java.math.BigDecimal to field com.yc.po.Hotel.price of type java.lang.Double in instance of com.yc.po.Hotel] with root cause
     java.lang.ClassCastException: cannot assign instance of java.math.BigDecimal to field com.yc.po.Hotel.price of type java.lang.Double in instance of com.yc.po.Hotel
    	at java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2133)
    	at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1305)
    	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2006)
    	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1924)
    	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
    	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
    	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
    	at java.util.ArrayList.readObject(ArrayList.java:791)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:497)
    	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058)
    	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1900)
    	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
    	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
    	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
    	at org.springframework.core.serializer.DefaultDeserializer.deserialize(DefaultDeserializer.java:70)
    	at org.springframework.core.serializer.support.DeserializingConverter.convert(DeserializingConverter.java:73)
    	at org.springframework.core.serializer.support.DeserializingConverter.convert(DeserializingConverter.java:36)
    	at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.deserialize(JdkSerializationRedisSerializer.java:39)
    	at org.springframework.data.redis.core.AbstractOperations.deserializeValue(AbstractOperations.java:296)
    	at org.springframework.data.redis.core.AbstractOperations$ValueDeserializingRedisCallback.doInRedis(AbstractOperations.java:53)
    	at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:191)
    	at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:153)
    	at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:86)
    	at org.springframework.data.redis.core.DefaultValueOperations.get(DefaultValueOperations.java:43)
    	at com.yc.controller.HotelController.findByStart(HotelController.java:60)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:497)
    	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
    	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
    	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
    	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
    	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:622)
    	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	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:240)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	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:240)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
    	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:492)
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
    	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502)
    	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1152)
    	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
    	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2527)
    	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2516)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    	at java.util.concurrent.ThreadPoolExecutor$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)

## **经过排查是因为没有添加redis的反序列化操作。在配置redis时添加如下配置** ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQxNjY4Ng_size_16_color_FFFFFF_t_70][]

## **本想着这样就大功告成了！但是万万没想到，又蹦出来一个幺蛾子，幺蛾子如下：** ##

29-Sep-2019 08:54:24.342 严重 [86] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcherServlet] in context with path [/tour_war_exploded] threw exception [Request processing failed; nested exception is java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String] with root cause
     java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
    	at org.springframework.data.redis.serializer.StringRedisSerializer.serialize(StringRedisSerializer.java:32)
    	at org.springframework.data.redis.core.RedisTemplate.rawKey(RedisTemplate.java:480)
    	at org.springframework.data.redis.core.RedisTemplate.hasKey(RedisTemplate.java:626)
    	at com.yc.controller.HotelController.findByStart(HotelController.java:58)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:497)
    	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
    	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
    	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
    	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
    	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:622)
    	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	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:240)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	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:240)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
    	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:492)
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
    	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502)
    	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1152)
    	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
    	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2527)
    	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2516)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    	at java.util.concurrent.ThreadPoolExecutor$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)

## **显示在反序列化的过程中，Integer类型转String类型错误，不能强制转化。，这时进入StringRedisSerializer.java源码中，发现源码如下：** ##

public class StringRedisSerializer implements RedisSerializer<String> {
    
    	private final Charset charset;
    
    	public StringRedisSerializer() {
    		this(Charset.forName("UTF8"));
    	}
    
    	public StringRedisSerializer(Charset charset) {
    		Assert.notNull(charset);
    		this.charset = charset;
    	}
    
    	public String deserialize(byte[] bytes) {
    		return (bytes == null ? null : new String(bytes, charset));
    	}
    
    	public byte[] serialize(String string) {
    		return (string == null ? null : string.getBytes(charset));
    	}
    }

## **从第一行可以看见，默认的转化后的类型是String类型，但是我数据里有Integer类型数据，所以就报强制类型转换错误。** ##

## **这时我们对其重写，把String改为Object。重写代码如下：** ##

public class StringRedisSerializer implements RedisSerializer<Object> {
        private final Charset charset;
        Gson gson = new Gson();
        private final String target = "\"";
    
        private final String replacement = "";
    
    
        public StringRedisSerializer() {
            this(Charset.forName("UTF8"));
        }
    
        public StringRedisSerializer(Charset charset) {
            Assert.notNull(charset);
            this.charset = charset;
        }
    
        @Override
        public byte[] serialize(Object o) throws SerializationException {
            String string = gson.toJson(o);
            if (string == null) {
                return null;
            }
            string = string.replace(target, replacement);
            return string.getBytes(charset);
    
        }

## **然后再把原来配置redis反序列化的类改为重写后的类，如下图。这个就不上源码了，可能因为StringRedisSerializer.java放置的位置不一样，包名不一样，自己稍作微调即可。** ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQxNjY4Ng_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQxNjY4Ng_size_16_color_FFFFFF_t_70]: /images/20230810/7fa0ed53c9d5429a9e7c8bce55832a33.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQxNjY4Ng_size_16_color_FFFFFF_t_70 1]: /images/20230810/9a2da03483de4b2f8509d6758a7d9e23.png