java - 序列化对象时出现 StackOverflowError

Question

我想用这个方法序列化一个对象:

public void serializ(CRDT m) throws IOException {
    ByteArrayOutputStream byteOutput = new ByteArrayOutputStream();
    ObjectOutputStream stream = new ObjectOutputStream(byteOutput);
    stream.writeObject(m);
    sumMemory = byteOutput.size();

    stream.flush();
    stream.close();
    byteOutput.flush();
    byteOutput.close();
}

我有一个异常 java.lang.StackOverflowError

Exception in thread "main" java.lang.StackOverflowError
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1169)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
    ...

我在一些论坛上看到我需要重新实现 writeObject/readObject 方法。这是唯一可能的解决方案吗？以及如何重新实现 writeObject/readObject

我要序列化的对象是: http://pastebin.com/D1kEidtn

导致错误的两个类是: pastebin.com/Sb3X0Quq和 enter link description here

Answer 1

CRDT 是被序列化的对象 m 的父类(super class)。错误是从 CRDT 派生的类似乎有对自身的引用，导致无限递归
您会在堆栈跟踪中看到它。
Tipp 通过使用调试器或在 serialize() 方法的开头添加 System.out.println(m.getClass()) 来找出对象 CRDT m: 的类。然后当你知道类时，检查对象是否有对自身的引用。