套接字发送和接收字节数组 [英] Socket send and receive byte array

问题描述

在服务器中，我通过 Java 套接字向客户端发送了一个字节数组

In server, I have send a byte array to client through Java socket

byte[] message = ... ;

DataOutputStream dout = new DataOutputStream(client.getOutputStream());
dout.write(message);

如何从客户端接收这个字节数组?

How can I receive this byte array from client?

推荐答案

试试这个，它对我有用.

发件人:

Try this, it's working for me.

Sender:

byte[] message = ...
Socket socket = ...
DataOutputStream dOut = new DataOutputStream(socket.getOutputStream());

dOut.writeInt(message.length); // write length of the message
dOut.write(message);           // write the message

接收方:

Socket socket = ...
DataInputStream dIn = new DataInputStream(socket.getInputStream());

int length = dIn.readInt();                    // read length of incoming message
if(length>0) {
    byte[] message = new byte[length];
    dIn.readFully(message, 0, message.length); // read the message
}

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