java – 将对象强制转换为byteArray

发布时间：2020-12-15 05:08:37 所属栏目：Java 来源：网络整理

导读：我有一个功能 public static Object receviceSigAndData (Socket s) { byte[] data = null; try { DataInputStream din2 = new DataInputStream(s.getInputStream()); int sig_len = 0; sig_len = din2.readInt(); byte[] sig = new byte[sig_len]; din2.rea

我有一个功能

public static Object receviceSigAndData (Socket s) {
       byte[] data = null;
       try {
            DataInputStream din2 = new DataInputStream(s.getInputStream());
            int sig_len = 0;
            sig_len = din2.readInt();
            byte[] sig = new byte[sig_len];
            din2.readFully(sig);
            int data_len = 0;
            data_len = din2.readInt();
            data = new byte[data_len];     
            dsa.update(data);


       } catch (IOException ioe) {
                ioe.printStackTrace();
       } catch (Exception e) {
                e.printStackTrace();
       }

       return (Object)data;
   }

函数返回一个对象,如果对象是字节数组,我该如何将对象转换为byte []？

byte[] b = (?)receviceSigAndData (socket);

谢谢

解决方法

下面是两个辅助方法,可以将字节数组序列化和反序列化为对象.

public static Object deserializeBytes(byte[] bytes) throws IOException,ClassNotFoundException
{
    ByteArrayInputStream bytesIn = new ByteArrayInputStream(bytes);
    ObjectInputStream ois = new ObjectInputStream(bytesIn);
    Object obj = ois.readObject();
    ois.close();
    return obj;
}


public static byte[] serializeObject(Object obj) throws IOException
{
    ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(bytesOut);
    oos.writeObject(obj);
    oos.flush();
    byte[] bytes = bytesOut.toByteArray();
    bytesOut.close();
    oos.close();
    return bytes;
}

（编辑：李大同）

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