package TCP;
import java.io.*;
import java.net.*;
import javax.swing.*;
 public class Server {
     //服務器端的輸入流
    static  BufferedReader br;
     //服務器端的輸出流
    static  PrintStream ps;
     //服務器相關的界面組件
    static  JTextArea text;   
            JFrame frame;

    public Server(){
        //服務器端的界面的實例化
        JFrame frame=new JFrame("服務器端");
        text=new JTextArea();
        JScrollPane scroll =new JScrollPane(text);
        frame.add(scroll);
        frame.setVisible(true);
        frame.setSize(300,400);
        //這里設置服務器端的文本框是不可編輯的
        text.setEditable(false);
    }

    public static void main(String[] args) throws Exception{      
        new Server();    //生成服務器界面
        //通過服務器端構造函數  ServerSocket(port) 實例化一個服務器端口
        ServerSocket server=new ServerSocket(2000);
        text.append("監聽2000端口"+"/n");
        //實例化一個接受服務器數據的對象
        Socket client=server.accept();
        br =new BufferedReader(new InputStreamReader(client.getInputStream()));
        ps =new PrintStream(client.getOutputStream());       
        String msg;
        //如果輸入流不為空,將接受到的信息打印到相應的文本框中并反饋回收到的信息
        while ((msg =br.readLine())!=null) 
        {
            text.append("服務器端收到："+msg+"/n");
            ps.println(msg);
            if(msg.equals("quit"))
            {  
                text.append("客戶端“2000”已退出！"+"/n");
                text.append("服務器程序將退出！");               
                break;
            }
        }
        ps.close();
        br.close();
        client.close();
    }
}

package TCP;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import java.net.*;
public class Client implements ActionListener{
   //這里有兩個圖形界面，一個是連接的frame,另一個和服務器通信的界面frame1   
    private  JFrame frame;
    private  JLabel adress;
    private  JLabel port;
             JTextField adresstext;
             JTextField porttext;
             JButton connect;

    private JFrame frame1;
    private JLabel shuru;
    private JPanel panel1;
    private JPanel panel2;
    private JLabel jieshou;
            JButton send;
    static JTextArea shurukuang;
    static TextArea jieshoukuang;

    //從服務端接受的數據流
    static BufferedReader br1;
    //從客戶端輸出的數據流
    static PrintStream ps;
    //從通信界面中的輸入框接受的數據流
    static BufferedReader br2;
    static Socket client;
    //將輸入框字符串轉換為字符串流所需的字符串的輸入流
    static ByteArrayInputStream stringInputStream ;

   public Client() {
       //連接界面的實例化
        frame=new JFrame();
        adress=new JLabel("IP 地址");
        port =new JLabel("端口號");
        adresstext=new JTextField("127.0.0.1",10);
        porttext=new JTextField("2000",10);
        connect=new JButton("連接");
            //連接界面的布局          
        frame.setLayout(new FlowLayout());
        frame.add(adress);
        frame.add(adresstext);
        frame.add(port);  
        frame.add(porttext);
        frame.add(connect);
        frame.setVisible(true);
        frame.setSize(200,150);          
        connect.addActionListener(this);
          //通信界面的實例化
        frame1=new JFrame();
        shuru=new JLabel("請輸入");
          shurukuang=new JTextArea("請輸入????",5,40); 

          panel1=new JPanel();
          panel1.add(shuru);
          panel1.add(shurukuang);
          panel1.setLayout(new FlowLayout());

          send=new JButton("發送");
          panel2=new JPanel();
          jieshou=new JLabel("已接受");

         jieshoukuang=new TextArea(8,60);    
          jieshoukuang.setEditable(false);

          panel2.add(jieshou);
          panel2.add(jieshoukuang);
          panel2.setLayout(new FlowLayout());       
          frame1.setLayout(new FlowLayout());
              //通信界面都的布局
          frame1.add(BorderLayout.NORTH,panel1);
          frame1.add(send);
          frame1.add(BorderLayout.SOUTH,panel2);
             //連接時通信界面是處于看不到的
          frame1.setVisible(false);
          frame1.setSize(500,350);
          send.addActionListener(this); 
            }
         //兩個界面當中都有相應的按鈕時間，為相應的時間添加動作
      public  void  actionPerformed(ActionEvent e) {
         if(e.getSource()==connect){   
          try {
                  //當觸發連接按鈕時，實例化一個客戶端
                client=new Socket("127.0.0.1",2000);   
                  //隱藏連接界面，顯示通信界面
                frame.setVisible(false);
                frame1.setVisible(true);
                jieshoukuang.append("已經連接上服務器！"+"/n");           
           } catch (IOException e1){
                 System.out.println("鏈接失敗！");
                e1.printStackTrace();
             }
         }
         //通信界面中的發送按鈕相應的時間處理
        if(e.getSource()==send){
              //將輸入框中的字符串轉換為字符串流
             stringInputStream = new ByteArrayInputStream((shurukuang.getText()).getBytes());
             br2 =new BufferedReader(new InputStreamReader(stringInputStream));
             String msg;
             try{
              while((msg=br2.readLine())!=null){   
                  ps.println(msg);   //將輸入框中的內容發送給服務器端       
                  jieshoukuang.append("向服務器發送："+msg+"/n");
                  jieshoukuang.append("客戶端接受相應:"+br1.readLine()+"/n");
                  if(msg.equals("quit"))
                     {
                        jieshoukuang.append("客戶端將退出!");
                        br1.close();
                        ps.close();
                        client.close();
                        frame1.setVisible(false);
                        break;
                           }                     
                      }   
             }catch(IOException e2){
                 System.out.println("讀輸入框數據出錯！");                 
              }
             shurukuang.setText("");
          }
      } 

      public static void main(String[] args) throws IOException{
           new Client();  //實例化連接界面
           client=new Socket("127.0.0.1",2000);            
           //從服務端接受的數據 
           br1=new BufferedReader(new InputStreamReader(client.getInputStream()));
            //從客戶端輸出的數據
           ps =new PrintStream(client.getOutputStream());         
              }
        }