基于java TCP网络通信的实例详解

package TCP;
import java.io.*;
import java.net.*;
import javax.swing.*;
 public class Server {
     //服务器端的输入流
    static  BufferedReader br;
     //服务器端的输出流
    static  PrintStream ps;
     //服务器相关的界面组件
    static  JTextArea text;   
            JFrame frame;

    public Server(){
        //服务器端的界面的实例化
        JFrame frame=new JFrame("服务器端");
        text=new JTextArea();
        JScrollPane scroll =new JScrollPane(text);
        frame.add(scroll);
        frame.setVisible(true);
        frame.setSize(300,400);
        //这里设置服务器端的文本框是不可编辑的
        text.setEditable(false);
    }

    public static void main(String[] args) throws Exception{      
        new Server();    //生成服务器界面
        //通过服务器端构造函数  ServerSocket(port) 实例化一个服务器端口
        ServerSocket server=new ServerSocket(2000);
        text.append("监听2000端口"+"\n");
        //实例化一个接受服务器数据的对象
        Socket client=server.accept();
        br =new BufferedReader(new InputStreamReader(client.getInputStream()));
        ps =new PrintStream(client.getOutputStream());       
        String msg;
        //如果输入流不为空,将接受到的信息打印到相应的文本框中并反馈回收到的信息
        while ((msg =br.readLine())!=null) 
        {
            text.append("服务器端收到："+msg+"\n");
            ps.println(msg);
            if(msg.equals("quit"))
            {  
                text.append("客户端“2000”已退出！"+"\n");
                text.append("服务器程序将退出！");               
                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{
   //这里有两个图形界面，一个是连接的frame,另一个和服务器通信的界面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;

    //从服务端接受的数据流
    static BufferedReader br1;
    //从客户端输出的数据流
    static PrintStream ps;
    //从通信界面中的输入框接受的数据流
    static BufferedReader br2;
    static Socket client;
    //将输入框字符串转换为字符串流所需的字符串的输入流
    static ByteArrayInputStream stringInputStream ;

   public Client() {
       //连接界面的实例化
        frame=new JFrame();
        adress=new JLabel("IP 地址");
        port =new JLabel("端口号");
        adresstext=new JTextField("127.0.0.1",10);
        porttext=new JTextField("2000",10);
        connect=new JButton("连接");
            //连接界面的布局          
        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);
          //通信界面的实例化
        frame1=new JFrame();
        shuru=new JLabel("请输入");
          shurukuang=new JTextArea("请输入····",5,40); 

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

          send=new JButton("发送");
          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);
             //连接时通信界面是处于看不到的
          frame1.setVisible(false);
          frame1.setSize(500,350);
          send.addActionListener(this); 
            }
         //两个界面当中都有相应的按钮时间，为相应的时间添加动作
      public  void  actionPerformed(ActionEvent e) {
         if(e.getSource()==connect){   
          try {
                  //当触发连接按钮时，实例化一个客户端
                client=new Socket("127.0.0.1",2000);   
                  //隐藏连接界面，显示通信界面
                frame.setVisible(false);
                frame1.setVisible(true);
                jieshoukuang.append("已经连接上服务器！"+"\n");           
           } catch (IOException e1){
                 System.out.println("链接失败！");
                e1.printStackTrace();
             }
         }
         //通信界面中的发送按钮相应的时间处理
        if(e.getSource()==send){
              //将输入框中的字符串转换为字符串流
             stringInputStream = new ByteArrayInputStream((shurukuang.getText()).getBytes());
             br2 =new BufferedReader(new InputStreamReader(stringInputStream));
             String msg;
             try{
              while((msg=br2.readLine())!=null){   
                  ps.println(msg);   //将输入框中的内容发送给服务器端       
                  jieshoukuang.append("向服务器发送："+msg+"\n");
                  jieshoukuang.append("客户端接受相应:"+br1.readLine()+"\n");
                  if(msg.equals("quit"))
                     {
                        jieshoukuang.append("客户端将退出!");
                        br1.close();
                        ps.close();
                        client.close();
                        frame1.setVisible(false);
                        break;
                           }                     
                      }   
             }catch(IOException e2){
                 System.out.println("读输入框数据出错！");                 
              }
             shurukuang.setText("");
          }
      } 

      public static void main(String[] args) throws IOException{
           new Client();  //实例化连接界面
           client=new Socket("127.0.0.1",2000);            
           //从服务端接受的数据 
           br1=new BufferedReader(new InputStreamReader(client.getInputStream()));
            //从客户端输出的数据
           ps =new PrintStream(client.getOutputStream());         
              }
        }