如何从服务器中的客户端接收输入？

Question

如何在客户端控制台上将输入发送到服务器？ 到目前为止，我有

         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

            String input = br.readLine();

如何在服务器端获得“输入”？ 我必须在clientSocket上调用什么？ 我已经试过了：

PrintWriter out = new PrintWriter(clientSocket.getOutputStream());

out.write(input);

在服务器端：

    serverSocket = new ServerSocket(port);
    while(true) {
        clientSocket = serverSocket.accept();
        out = new PrintWriter(clientSocket.getOutputStream(), true);
        in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));

        String input = in.readLine();
        if (input.equals("2")) {
            System.out.println("activate receiveFile");
            receiveFile();
        }

但是，当我输入2时，“输入”肯定不是2。

Answer 1

创建PrintWriter对象时，尝试使用PrintWriter（Writer out，boolean autoFlush）构造函数。 例如：out = new PrintWriter（echoSocket.getOutputStream（），true）；

Answer 2

服务器端构造器

 try {
  is = new BufferedReader(new InputStreamReader(new BufferedInputStream(soc.getInputStream())));
  os = new PrintWriter(new BufferedOutputStream(soc.getOutputStream()), false);
  printWriterQueue = new PrintWriterQueue(this, os, is, timeout);
  soc.setSoTimeout(5000);
  start();
} catch (Exception e){
  e.printStackTrace();
}

您应该使用一个线程，以便在运行中

 while (!end) {
    do {
      try {
        st=is.readLine();
      } catch (InterruptedIOException ie) {
        st="";
      }
    } while (!end && st.length()==0);

客户端构造器

soc     = new Socket(IpAddress, 2999);
    in      = new BufferedReader(new InputStreamReader(soc.getInputStream()));
    out     = new PrintWriter(soc.getOutputStream());
    addText("Connection up and running...");
    soc.setSoTimeout(5000);
    printWriterQueue = new PrintWriterQueue(this, out, in, 10000);
    Thread th=new Thread(this);
    th.start();

客户端也有一个线程，所以在run（）

try {
  do {
    do {
      try {
        msg=in.readLine();
      } catch (InterruptedIOException ie) {
        msg="";
      }
    } while (!end && msg.length()==0);
    if (!end) {
      System.out.println("["+msg+"]");
    }
  } while (!end);
} catch (Exception exc) {
  exc.printStackTrace();
}