在没有serialVersionUID的情况下反序列化对象时出现问题

本文介绍了在没有serialVersionUID的情况下反序列化对象时出现问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

首先 我 获取 例外 - ` java 。 io 。 InvalidClassException local class 不兼容： stream classdesc serialVersionUID = 4597316331807173261 ， local class serialVersionUID = -3344057582987646196`， as `serialVersionUID` class COOKIE API HtmlUnit 我 am 使用，此 exception 发生 as 类 Cookie 是 已更改 因为 我们 upgrade version `HtmlUnit`， so what idea to my mind to avoid 匹配 `serialversionUID` 而 deserialing ， so 我 有 尝试 解决方案 :: I 覆盖 readClassDescriptor ObjectInputStre的class =code-leadattribute> am class this 方式 < pre lang =java> protected ObjectStreamClass readClassDescriptor（） throws IOException ， ClassNotFoundException { ObjectStreamClass resultClassDescriptor = super 。 readClassDescriptor（）; // 最初流描述符 类 localClass = Class .forName（ resultClassDescriptor.getName（））; // 此描述符所代表的本地JVM中的类。 if （localClass == null）{ System 。 out .println（No local class for + resultClassDescriptor .getName（））; return resultClassDescriptor; } ObjectStreamClass localClassDescriptor = ObjectStreamClass .lookup（localClass）; 如果 （localClassDescriptor ！= null）{ // 仅当类实现可序列化 final long localSUID = localClassDescriptor getSerialVersionUID（）; final long streamSUID = resultClassDescriptor .getSerialVersionUID（）; 如果 （streamSUID ！= localSUID）{ // 检查serialVersionUID不匹配。 final StringBuffer s = new StringBuffer（Overriding serialized class version mismatch ： ）; s 。 append（local serialVersionUID = ）。append（localSUID）; s .append（ stream serialVersionUID = ）。append（streamSUID）; 异常 e = new InvalidClassException（s.toString（））; 系统。 out .println（潜在致命 反序列化 操作。 + e）; resultClassDescriptor = localClassDescriptor; // 使用本地类描述符进行反序列化 } } return resultClassDescriptor; }

现在它将我的streamUID转换为LocalUID，但这个例外来找我 `StreamCorruptedException：无效的类型代码：00`

解决方案

Firstly I was getting the Exception - ` java.io.InvalidClassException local class incompatible: stream classdesc serialVersionUID = 4597316331807173261, local class serialVersionUID = -3344057582987646196`, as there is not a `serialVersionUID` in the class COOKIE of the API HtmlUnit that I am using, this exception occurs as the class Cookie is changed because we upgrade the version of `HtmlUnit` , so what idea comes to my mind is to avoid the matching of `serialversionUID` while deserialing, so I have tried the below solution :: I have overrided readClassDescriptor of ObjectInputStream class in this way <pre lang="java">protected ObjectStreamClass readClassDescriptor() throws IOException, ClassNotFoundException { ObjectStreamClass resultClassDescriptor = super.readClassDescriptor(); // initially streams descriptor Class localClass = Class.forName(resultClassDescriptor.getName()); // the class in the local JVM that this descriptor represents. if (localClass == null) { System.out.println("No local class for " + resultClassDescriptor.getName()); return resultClassDescriptor; } ObjectStreamClass localClassDescriptor = ObjectStreamClass.lookup(localClass); if (localClassDescriptor != null) { // only if class implements serializable final long localSUID = localClassDescriptor.getSerialVersionUID(); final long streamSUID = resultClassDescriptor.getSerialVersionUID(); if (streamSUID != localSUID) { // check for serialVersionUID mismatch. final StringBuffer s = new StringBuffer("Overriding serialized class version mismatch: "); s.append("local serialVersionUID = ").append(localSUID); s.append(" stream serialVersionUID = ").append(streamSUID); Exception e = new InvalidClassException(s.toString()); System.out.println("Potentially Fatal Deserialization Operation. " + e); resultClassDescriptor = localClassDescriptor; // Use local class descriptor for deserialization } } return resultClassDescriptor; }

and Now it converts my streamUID to LocalUID but this exception comes to me `StreamCorruptedException: invalid type code: 00`

解决方案