即时通信（1）Java sockt基础

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服务端： ServerSocket serverSocket=new ServerSocket(5471);

客户端：Socket socket=new Socket(InetAddress.getLocalHost(),5471);

InetAddress.getLocalHost()：获得计算机名和IP地址，如：USER-20140213SH/192.168.1.103

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));从控制台接收一个字符串

BufferedReader socketIs=new BufferedReader(new InputStreamReader(socket.getInputStream())); //从socket对象接收一个输入流

PrintWriter socketOs=new PrintWriter(socket.getOutputStream()); //从socket对象接收一个输出流

服务端程序：

public static void Server() throws IOException{ ServerSocket serverSocket=new ServerSocket(5471); Socket clientSocket=serverSocket.accept();  BufferedReader is=new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));  PrintWriter os=new PrintWriter(clientSocket.getOutputStream());   BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));  while(true){               String str=is.readLine();              System.out.println("Client : "+str);                        os.println(sin.readLine());              os.flush();//刷新输出流，使Client马上收到该字符串              if(str.equals("end"))            {                  break;              }   }    is.close();          os.close();          clientSocket.close();          serverSocket.close();  }

客户端程序：

public static void Client() throws IOException{Socket socket=new Socket(InetAddress.getLocalHost(),5471); BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));  BufferedReader socketIs=new BufferedReader(new InputStreamReader(socket.getInputStream())); PrintWriter socketOs=new PrintWriter(socket.getOutputStream());   while(true){              String str=sin.readLine();            socketOs.println(str);              socketOs.flush(); //刷新输出流，使Server马上收到该字符串                            String s=socketIs.readLine();              System.out.println("Server : "+s);//在标准输出上打印从Server读入的字符串              System.out.println();                        if(str.equals("end")){                  break;              }          }   socketIs.close();//关闭Socket输入流   socketOs.close();//关闭Socket输出流           socket.close();//关闭Socket }

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