网络Socket编程（简易qq实现之C/S通信1）

1. 目标：实现两个用户之间的通信，利用的是简单的Socket知识以及简略界面

2. 界面：分为客户端与服务器端（如下图）

3. 基本功能：客户端先向服务器端发送一个消息，这样就可以让客户端与服务器端实现持续通信

4. 代码实现：

（1）服务器端代码

 package com.test;

 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.net.ServerSocket;
 import java.net.Socket;

 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JTextArea;
 import javax.swing.JTextField;

 public class QQServer extends JFrame implements ActionListener{
     JTextArea jta;
     JTextField jtf;
     JButton jb;
     JScrollPane jsp;
     JPanel jpn;

     PrintWriter pw;
     /**
      * @param args
      */
     public static void main(String[] args) {
         QQServer qq = new QQServer();
         qq.init();
     }
     public QQServer(){
         //页面布局
         jta = new JTextArea();
         jtf = new JTextField(10);
         jb  = new JButton("发送");
         jb.addActionListener(this);//事件监听
         jsp = new JScrollPane(jta);
         jpn = new JPanel();

         jpn.add(jtf);
         jpn.add(jb);

         this.add(jsp,"Center");
         this.add(jpn,"South");
         this.setTitle("简易qq服务器端");

         this.setSize(300,200);
         this.setVisible(true);
     }
     public void init(){
         try {
             //服务器监听端口
             System.out.println("服务器在监听.....");
             ServerSocket ss = new ServerSocket(9992);
             Socket s = ss.accept();
             //服务器接收流
             InputStreamReader isr = new InputStreamReader(s.getInputStream());
             BufferedReader br = new BufferedReader(isr);
             //服务器输出
             pw = new PrintWriter(s.getOutputStream(), true);
             while (true) {
                 //持续接收从客户端信息并显示
                 String info = br.readLine();
                 jta.append("客户端对服务器端说:"+info+"\r\n");
             }
         } catch (Exception e) {
             // TODO: handle exception
         }
     }
     @Override
     public void actionPerformed(ActionEvent e) {
         //在Jtextfield内获取文字，并发送给客户端
         if(e.getSource()==jb){
             String msg = jtf.getText();
             jta.append("服务器对客户端说："+msg+"\r\n");
             pw.println(msg);
             jtf.setText("");
         }

     }

 }

（2）客户端代码

 package com.test;
 /**
  * 简易qq,服务器端实现
  */
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.io.BufferedReader;
 import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.net.Socket;

 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JTextArea;
 import javax.swing.JTextField;

 public class QQClient extends JFrame implements ActionListener{
     JTextArea jta;//
     JTextField jtf;
     JButton jb;
     JScrollPane jsp;
     JPanel jpn;

     PrintWriter pw;
     public static void main(String[] args) {
         QQClient qq = new QQClient();
         qq.init();
     }
     public QQClient(){
         //界面布局
         jta = new JTextArea();
         jtf = new JTextField(10);
         jb  = new JButton("发送");
         jb.addActionListener(this);
         jsp = new JScrollPane(jta);
         jpn = new JPanel();

         jpn.add(jtf);
         jpn.add(jb);

         this.add(jsp,"Center");
         this.add(jpn,"South");
         this.setTitle("简易qq 客户端");

         this.setSize(300,200);
         this.setVisible(true);

     }
     public void init(){
         try {
             //客户端请求服务器
             Socket s = new Socket("127.0.0.1",9992);
             //客户端接收流
             InputStreamReader isr = new InputStreamReader(s.getInputStream());
             BufferedReader br = new BufferedReader(isr);
             //客户端输出
             pw = new PrintWriter(s.getOutputStream(), true);
             while (true) {
                 //持续接收从服务器信息并显示
                 String info = br.readLine();
                 jta.append("服务器端对客户端说："+info+"\r\n");
             }
         } catch (Exception e) {
             // TODO: handle exception
         }
     }
     @Override
     public void actionPerformed(ActionEvent e) {
         //在Jtextfield内获取文字，并发送给服务器端
         if(e.getSource()==jb){
             String msg = jtf.getText();
             jta.append("客户端对服务器端说："+msg+"\r\n");
             pw.println(msg);
             jtf.setText("");
         }

     }

 }