请教一下网络通信的问题

jayray007 2008-06-22 07:33:48

我写了一个简单的通讯.本机TCP和UDP能正常运行
但是放到局域网后TCP不能正常运行,UDP却能
这是为什么?

 try {

            Socket socket = new Socket("192.168.0.1", 8083);

            //socket.setSoTimeout(0);//设置连接超时

            String data = name + ":" + pw + ":" + "127.0.0.1";

            PrintWriter os = new PrintWriter(socket.getOutputStream()); //发送请求

            os.println(data);

            os.flush();

            BufferedReader is = new BufferedReader(new InputStreamReader(socket.

                    getInputStream())); //接收反馈

            if(info.equals(is.readLine().trim())){

                mainFrame.ct.setVisible(false);

                JOptionPane.showMessageDialog(null, "成功登录服务器", "恭喜",

                                              JOptionPane.INFORMATION_MESSAGE);

                

            }

            else if(full.equals(is.readLine().trim())){

                mainFrame.ct.setVisible(false);

                JOptionPane.showMessageDialog(null, "服务器繁忙,请重试", "错误",

                                              JOptionPane.ERROR_MESSAGE);

                mainFrame.lf.setVisible(true);

            }

            os.close();

            is.close();

            socket.close();

        } catch (Exception ex) {

            //ex.printStackTrace();

            JOptionPane.showMessageDialog(null, "无法连接服务器", "错误",

                                              JOptionPane.ERROR_MESSAGE);

             System.exit(0);

        }