Java的網路編程-Socket編程__演算法

Socket是使用TCP協議，此協議發送資料前會建立串連，保證資料的可靠性，

下面是個用戶端和伺服器端Socket通訊 的模版：

package demo;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.net.ServerSocket;import java.net.Socket;//伺服器接收到一個Socket後啟動一個線程處理資料轉送public class SocketThread extends Thread{    private Socket s;    public SocketThread(Socket s) {        // TODO Auto-generated constructor stub        this.s=s;    }    @Override    public void run() {        try {            OutputStreamWriter outw=new OutputStreamWriter(s.getOutputStream());            PrintWriter pw=new PrintWriter(outw);            pw.write("welcome:I am server");            pw.close();            outw.close();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}

package demo;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.net.ServerSocket;import java.net.Socket;//伺服器端啟動一個ServerSocket，使用accept（）迴圈監聽用戶端請求：public class Servermain {    public static void main(String[] args){        try {            ServerSocket server=new ServerSocket(8080);            Socket socket;            //服務端迴圈監聽            while((socket=server.accept())!=null){                //接收到串連，啟動一個線程處理                    new SocketThread(socket).start();            }        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}

package demo;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.net.Socket;import java.net.UnknownHostException;//用戶端串連public class ClientMain {    public static void main(String[] args) {        // TODO Auto-generated method stub        Socket c;        try {            for (int i = 0; i < 5; i++) {                c = new Socket("localhost",8080);                InputStreamReader inr=new InputStreamReader(c.getInputStream());                BufferedReader br=new BufferedReader(inr);                System.out.println(br.readLine());                br.close();                inr.close();            }        } catch (UnknownHostException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}

啟動順序是先啟動伺服器，然後啟動用戶端進行串連。此例中有5個用戶端進行串連。效果截圖：