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());                        }         }