socket服务端和客户端_socket 客户端和服务端-优快云博客

本文链接：https://blog.youkuaiyun.com/wuhongbo5885251/article/details/90606846

本文介绍了如何实现Socket服务端和客户端的通信。服务端通过开启监听等待客户端连接，建立连接后进行数据交互。客户端则负责发起连接请求，连接成功后同样进行数据通信。通过对Socket API的运用，展示了网络编程的基础应用。

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服务端：

new Thread(new Runnable() {
    @Override
    public void run() {
        try {
            // 监听指定的端口
            int port = 55533;
            server = new ServerSocket(port);
            Log.e(TAG, "socketServer将一直等待连接的到来");
            serviceSocket = server.accept();//如果不设置连接超时，会发生阻塞等待
            Log.e(TAG, "是否连接中: " + serviceSocket.isConnected());
            serviceSocket.setSoTimeout(3000);// 设置读取流的超时时间，不设置，则是一直阻塞读取
            byte[] bytes;
            // 建立好连接后，从socket中获取输入流，并建立缓冲区进行读取
            InputStream inputStream = serviceSocket.getInputStream();
            final OutputStream outputStream = serviceSocket.getOutputStream();
            //因为对方无论何时发送数据，我们必须接收。这里开了个子线程在循环读流。由于读流是阻塞式，所以需要设置读流超时时间
            while (isAccept) {
                outputStream.write("ok\r\n".getBytes());
                outputStream.flush();
                Log.e(TAG, "发送成功");
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                int len = inputStream.available();
                StringBuilder sb = new StringBuilder();
                while (len != 0) {
                    bytes = new byte[len];
                    inputStream.read(bytes);
                    // 注意指定编码格式，发送方和接收方一定要统一，建议使用UTF-8
                    sb.append(new String(bytes, 0, len, "UTF-8"));
                    len = inputStream.available();
                    Log.e(TAG, "get message from client: " + sb);;
                }
            }
        } catch (Exception e) {
            Log.e(TAG, "socket错误===" + e.toString());
        }
    }
}).start();

客户端：

int port = 55533;
// 与服务端建立连接
Log.d("data====", socket + "==========" + outputStream);
socket = new Socket(ipAddress, port);
socket.setKeepAlive(true);
outputStream = socket.getOutputStream();
InputStream inputStream = socket.getInputStream();
myHandler.sendEmptyMessage(3);
byte[] bytes;
while (isConnect) {
    int len = inputStream.available();
    StringBuilder sb = new StringBuilder();
    while (len != 0) {
        bytes = new byte[len];
        inputStream.read(bytes);
        sb.append(new String(bytes, 0, len, "UTF-8"));
        len = inputStream.available();
        Log.e("data===", "消息: " + sb);
    }
   if (!TextUtils.isEmpty(msg)) {
     try {
       Log.e("data====", " 开始传数据");
       outputStream.write(msg.getBytes());
       outputStream.flush();
       msg = "";
       myHandler.sendEmptyMessage(2);
       Log.e("data====", " 传数据finish...");
     } catch (Exception e) {
       msg = "";
       myHandler.sendEmptyMessage(1);
       e.printStackTrace();
       Log.e("data====", "333错误: " + e.toString());
     }
   }
}