等待 java 客户端的套接字服务器响应

Question

此客户端必须与私人服务器交互。我必须这样做：

从客户端发送一个块消息"Block"
通过持久性 tcp
从客户端发送一条解锁消息"Unlock"

问题是，当我发送接收 xml 数据的命令时，shell 仍然固定在 readLine() 行上，并返回任何内容。

这是我的客户代码：

            /* LOCK  */
            socket = new Socket(host.getHostName(), 7000);
            socket.setSoTimeout(50000);
            OutputStream out = socket.getOutputStream();
            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

            System.out.println("\nlocking...");
            out.write(lockCommand);

            out.flush();
            out.close();
            in.close();
            socket.close();

            /* SEND BOLLE COMMAND  */
            //String command = "OBolle                                   01/05/2015\ff";
            byte[] bolleCommand= {0x4f, 0x42, 0x6f, 0x6c, 0x6c, 0x65, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x30, 0x31, 0x2f, 0x30, 0x35, 0x2f , 0x32, 0x30, 0x31, 0x35, (byte) 0xff};              
            socket = new Socket(host.getHostName(), 7001);
            socket.setSoTimeout(50000);
            out = socket.getOutputStream();
            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

            System.out.println("\nsending command for receive XML data.....");
            out.write(bolleCommand);

            System.out.println("\nReading XML response.....");
            String response = in.readLine();
            System.out.println("in "+ response);

            out.close();
            in.close();
            socket.close();

            /* UNLOCK  */
            socket = new Socket(host.getHostName(), 7000);
            socket.setSoTimeout(50000);
            out = socket.getOutputStream();
            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

            System.out.println("\nunlocking...");
            out.write(unlockCommand);
            out.flush();

            out.close();
            in.close();
            socket.close();

            System.out.println("\nAll done...");

我必须等待服务器响应，即在 10/15 秒后返回。

连接是 TCP 持久连接。

我也试试：

//String response = in.readLine();
            //System.out.println("in "+ response);
            int dataBuffer;
            while ((dataBuffer = socket.getInputStream().read()) != -1) 
               System.out.print((char)dataBuffer);

但我有一些结果... 我该怎么办？

非常感谢。

这是返回数据的示例：

<DocumentElement>\r\n  <ValoreTesto1 />\r\n    <ValoreTesto2 />\r\n    <ValoreTesto3 />\r\n    <ValoreTesto4 />\r\n    <ValoreTesto5 />\r\n    <ValoreTesto6 />\r\n    <ValoreTesto7 />\r\n    <ValoreTesto8 />\r\n    <ValoreTesto9 />\r\n        <QData>2015-05-09T00:00:00+02:00</QData>\r\n

更新：通过准确的嗅探，我了解到服务器以这种模式工作：

向7000发送锁定命令在 7001 上发送检索命令数据发送解锁到 7000 从命令 2

检索数据

Answer 1

您需要从套接字获取输入流：

BufferedReader in =
            new BufferedReader(
                new InputStreamReader(socket.getInputStream()));
String fromServer = in.readLine();

您可以通过阅读获得额外的帮助：https://docs.oracle.com/javase/tutorial/networking/sockets/readingWriting.html

Answer 2

String command = "OBolle                                   01/05/2015\ff";
out.write(command.getBytes());

常见问题。你在读台词，但不是在写台词。添加行终止符，或使用 println().

等待 java 客户端的套接字服务器响应

waiting socket server response with java client

java

sockets

response