serialization - Java对象序列化中嵌套对象原始值的java.lang.StackOverflowError异常

Question

我有我用来构建索引RangeTreeIndex的RangeTreeNode类，在插入 2500 条记录之后，我试图将RangeTreeIndex对象保存在我正在接收的文件中StackOverflowError，下面是我的整个代码：

public class RangeTreeNode<T> implements Serializable {
    private static final long serialVersionUID = -1;

    public T key;
    public Object data;
    public RangeTreeNode<T> left;
    public RangeTreeNode<T> right;

    public RangeTreeNode() {
    }
}

public class RangeTreeIndex implements Serializable {

    private RangeTreeNode<Number> root;
    private RangeTreeNode<Number> firstLeafNode;
    private RangeTreeNode<Number> lastLeafNode;
    private Number min;
    private Number max;

    public RangeTreeIndex() {
    }

    @Override
    public int insert(Number key, Object values) {
        Number newKey = new Double(key.doubleValue());

        if (newKey.doubleValue() < min.doubleValue()) {
            min = new Double(key.doubleValue());
        }
        if (newKey.doubleValue() > max.doubleValue()) {
            max = new Double(key.doubleValue());
        }

        RangeTreeNode<Number> newNode = new RangeTreeNode<>(newKey, values);
        this.root = this.insert(root, newNode);

        if (firstLeafNode == null && lastLeafNode == null) {
            firstLeafNode = newNode;
            lastLeafNode = newNode;
        } else if (newNode.key.doubleValue() < firstLeafNode.key.doubleValue()) {
            firstLeafNode = newNode;
        } else if (newNode.key.doubleValue() > lastLeafNode.key.doubleValue()) {
            lastLeafNode = newNode;
        }

        return 1;
    }

    private RangeTreeNode<Number> insert(RangeTreeNode<Number> parentNode, RangeTreeNode<Number> newNode) {
        if (parentNode == null) {
            parentNode = newNode;
        } else {
            if (newNode.key.doubleValue() <= parentNode.key.doubleValue()) {
                parentNode.left = insert(parentNode.left, newNode);
            } else {
                parentNode.right = insert(parentNode.right, newNode);
            }
        }

        return parentNode;
    }
}

public class Main {
    public static void main(String args[]) throws IOException {
        String filePath = "XYZ.jobject";
        try (RandomAccessFile raf = new RandomAccessFile(filePath, "rw");
             FileOutputStream fOut = new FileOutputStream(raf.getFD());
             BufferedOutputStream bos = new BufferedOutputStream(fOut);
             ObjectOutputStream oOut = new ObjectOutputStream(bos)) {
            oOut.writeObject(preferenceIndex);
        }
    }
}

以下是我收到的例外情况：

Exception in thread "Thread-5" java.lang.StackOverflowError
    at java.lang.Double.doubleToLongBits(Double.java:836)
    at java.io.Bits.putDouble(Bits.java:121)
    at java.io.ObjectStreamClass$FieldReflector.getPrimFieldValues(ObjectStreamClass.java:2168)
    at java.io.ObjectStreamClass.getPrimFieldValues(ObjectStreamClass.java:1389)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1533)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
    ...
    ...
    ...
    ...

即使我使用仅传递可序列化对象的Apache commons-lang库类，它也会引发相同的错误。SerializationUtils.serialize

任何人都可以用原始值来面对这个问题吗？

标签： serializationdata-structuresjava-8range-tree