Question

在对字节数组进行解压缩和反序列化时，我遇到了EOFException 堆栈跟踪：

java.io.EOFException的 at java.io.ObjectInputStream $ PeekInputStream.readFully（ObjectInputStream.java:2324） at java.io.ObjectInputStream $ BlockDataInputStream.readShort（ObjectInputStream.java:2793） at java.io.ObjectInputStream.readStreamHeader（ObjectInputStream.java:799）在java.io.ObjectInputStream。（ObjectInputStream.java:299）在com.chuck.pack.ResourcePacket.load（ResourcePacket.java:44）

// Functions related to load

public static ResourcePacket load(String packetName) {
    try {
        byte[] bytes = uncompress(fileToByteArray(new File(packetName)));
        ByteArrayInputStream in = new ByteArrayInputStream(bytes);
        ObjectInputStream objIn = new ObjectInputStream(in); // Error occured here
        return (ResourcePacket) objIn.readObject();
    } catch (Exception ex) {
        ex.printStackTrace();
    }

    return null;
}

private static byte[] uncompress(byte[] bytes) {
    try {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        Inflater ifl = new Inflater();
        ifl.setInput(bytes);

        byte[] buffer = new byte[4*1024];
        while(ifl.finished()) {
            int size = ifl.inflate(buffer);
            out.write(buffer, 0, size);
        }
        out.close();
        return out.toByteArray();
    } catch (Exception ex) {
        ex.printStackTrace();
        System.out.println("Error while load");
    }
    return null;
}

private static byte[] fileToByteArray(File file) {
    byte[] bytes = new byte[(int) file.length()];
    try {
        FileInputStream fileInputStream = new FileInputStream(file);
        fileInputStream.read(bytes);
        fileInputStream.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

    return bytes;
}

// Functions related to save

public void save() {
    try {
        byte[] bytes = compress(toByteArray());
        //byte[] bytes = toByteArray();
        FileOutputStream fileOutputStream = new FileOutputStream(packetName);
        fileOutputStream.write(bytes);
        fileOutputStream.close();
        System.out.println("Packet saved (" + resourceFiles.length + " Files)");
    } catch (IOException ex) {
        ex.printStackTrace();
        System.exit(-1);
    }
}

private byte[] compress(byte[] bytes) {
    try {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        Deflater dfl = new Deflater();
        dfl.setLevel(Deflater.BEST_SPEED);
        dfl.setInput(bytes);
        dfl.finish();
        byte[] tmp = new byte[4*1024];
        while(!dfl.finished())  {
            int size = dfl.deflate(tmp);
            out.write(tmp, 0, size);
        }
        out.close();
        return out.toByteArray();
    } catch (IOException ex) {
        ex.printStackTrace();
        System.out.println("Error while save");
    }
    System.exit(-1);
    return null;
}

private byte[] toByteArray() {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutputStream out = null;
    try {
        out = new ObjectOutputStream(bos);
        out.writeObject(this);
        byte[] bytes = bos.toByteArray();
        return bytes;
    } catch(IOException ex) {
        ex.printStackTrace();
        System.out.println("Error while create byte array");
    }
    System.exit(-1);
    return null;
}

有人想要解决这个问题吗？

Answer 1

在uncompress(..)方法中，while循环：

while(ifl.finished()) {
    int size = ifl.inflate(buffer);
    out.write(buffer, 0, size);
}

应该是

while(!ifl.finished()) {
    int size = ifl.inflate(buffer);
    out.write(buffer, 0, size);
}

否则，如果方法终止，uncompress(..)的结果为空字节数组。

通过字节数组进行反序列化时的EOFExcpetion

1 个答案: