java - socket -客戶端

 客戶端 ：  java 訪問服務器並不複雜， 只須要將主機名和 端口號傳輸給Socket 類的構造方法   

                             public Socket(String host, int port)

                                    throws UnknownHostException, IOException

                                {

                                    this(host != null ? new InetSocketAddress(host, port) :

                                         new InetSocketAddress(InetAddress.getByName(null), port),

                                         (SocketAddress) null, true);

                                }

                獲取網路鏈接的地址： 使用InetAddress對象 ，經過getByName()方法來獲取 

                socket 讀寫文本數據 ：經過socket.getInputStream()或者getOutputStream方法 

                        OutputStream os = socket.getOutputStream();

//寫入併發送報文 

                        os.write(MessageFormat.format("{0,number,00000000}", payload.length).getBytes("GBK"));

os.write(payload);

os.flush();

                         //接收報文 

                        InputStream is = socket.getInputStream();