聊天界面的输入流应该写在哪里呢？

[erikchang]

服务端：

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.JButton;
import javax.swing.JScrollPane;
import javax.swing.event.AncestorListener;
import java.io.*;
import java.net.*;

public class server {
	private JTextArea recevieArea;
	private JTextArea sentArea;
	private JButton submitbutton;
	private static ServerSocket serverSocket;
	private static Socket socket;
	private BufferedReader br;
	private DataOutputStream out;
	private String s = "";
	private JButton submit;

	public server() {
	}

	class frame extends JFrame {
		public frame() {
			setResizable(false);
			setVisible(true);
			this.setBounds(300, 200, 350, 300);
			this.setTitle("Server");
			panel p = new panel();
			Container c = getContentPane();
			setDefaultCloseOperation(EXIT_ON_CLOSE);
			c.add(p);
			show();
			repaint();

		}
	}

	class panel extends JPanel {
		public panel() {

			this.setBorder(null);

			submitbutton = new JButton("sent");
			submitbutton.setBounds(236, 200, 66, 35);
			add(submitbutton);
			setLayout(null);
			submitbutton.addActionListener(new lis());

			final JScrollPane scrollPane = new JScrollPane();
			scrollPane.setBounds(10, 10, 220, 99);
			add(scrollPane);

			recevieArea = new JTextArea(5, 20);
			scrollPane.setViewportView(recevieArea);
			recevieArea.setLineWrap(true);

			final JScrollPane scrollPane_1 = new JScrollPane();
			scrollPane_1.setBounds(10, 134, 220, 101);
			add(scrollPane_1);

			sentArea = new JTextArea(5, 20);
			scrollPane_1.setViewportView(sentArea);
			sentArea.setLineWrap(true);

			submit = new JButton();
			submit.setText("连接");
			submit.setBounds(236, 159, 66, 35);
			add(submit);
			
		}
	}

	class lis implements ActionListener {

		public void actionPerformed(ActionEvent e) {
			try {
				if (e.getSource() == submit) {

					serverSocket = new ServerSocket(5678);
					socket = serverSocket.accept();
					System.out.print("link ok");
				}
				if (e.getSource() == submitbutton) {
					s = sentArea.getText().trim();
					recevieArea.append(s + "\n");
					sentArea.setText("");
					out = new DataOutputStream(socket.getOutputStream());
					out.writeUTF(recevieArea.getText());
					

				}
			} catch (Exception ee) {
				System.out.print(ee.getMessage());
			}
		}
	}

	public static void main(String args[]) throws Exception {
		new server().new frame();

	}
}

客户端：

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.event.AncestorListener;
import java.io.*;
import java.net.*;

public class client {
	private JTextArea recevieArea;
	private JTextArea sentArea;
	private JButton submitbutton;
	private Socket socket;
	private PrintWriter pw;
	private DataOutputStream dos;
	private String s="";
	private JButton submit;
	public client(){
		
			}
	class frame extends JFrame{
		public frame(){
			setResizable(false);
			setVisible(true);
			this.setBounds(300,200,350,300);
			this.setTitle("Client");
			panel p = new panel();
			Container c = getContentPane();
			setDefaultCloseOperation(EXIT_ON_CLOSE);
			c.add(p);
			show();
			repaint();
			
		}
	}

	
	class lis implements ActionListener {

		public void actionPerformed(ActionEvent e) {
			if(e.getSource()==submit){
				try{
				socket=new Socket("127.0.0.1",5678); 
				System.out.print("link ok");
				}catch(Exception ee){
					System.out.print(ee.getMessage());
				}
			}
		}
		
	}
	class panel extends JPanel{
		public panel(){
			this.setBorder(null);
			
			submitbutton = new JButton("sent");
			submitbutton.setBounds(236, 200, 66, 35);
			add(submitbutton);
			setLayout(null);


			final JScrollPane scrollPane = new JScrollPane();
			scrollPane.setBounds(10, 10, 220, 99);
			add(scrollPane);
			
			recevieArea = new JTextArea(5,20);
			scrollPane.setViewportView(recevieArea);
			recevieArea.setLineWrap(true);

			final JScrollPane scrollPane_1 = new JScrollPane();
			scrollPane_1.setBounds(10, 134, 220, 101);
			add(scrollPane_1);
			
			sentArea = new JTextArea(5,20);
			scrollPane_1.setViewportView(sentArea);
			sentArea.setLineWrap(true);
			
			submit = new JButton();
			submit.setText("连接");
			submit.setBounds(236, 159, 66, 35);
			add(submit);
			submit.addActionListener(new lis());
		}
	}

	public static void main(String args []){
		new client().new frame();
		
	}
}

[hmsuccess]

  class Listen extends Thread       //客户端线程类用来监听服务器传来的信息
{
 String name=null;                   //用来存储客户端连接后的name信息
 DataInputStream dis=null;          //用来实现客户端接受服务器数据的输入流
 PrintStream ps=null;               //用来实现从客户端发送数据到服务器的打印流
 Socket socket=null;                //用来存储客户端的socket信息
 chatApplet parent=null;             //用来存储当前运行的chatApplet实例

 public Listen(chatApplet p,String n,Socket s)   //Listen类的构造器
	{
     //接受参数
	 parent=p;
	 name=n;
	 socket=s;

	 try
		{
		 //实例化两个数据流
	     dis=new DataInputStream(s.getInputStream());
		 ps=new PrintStream(s.getOutputStream());

	 }
	 catch(IOException e)
		{
	     System.out.println("Error:"+e);
		 parent.disconnect();
	   }
    }   //end of Listen constractor
  
 public void run()                               //线程运行方法
	{
      String msg=null;
	  while(true)
		{
	     try{msg=dis.readLine();}                 //读取从服务器传来的信息
		 catch(IOException e)
			{
		     System.out.println("Error:"+e);
			 parent.disconnect();
		 }
		 if (msg==null)                           //如果从服务器传来的信息为空则断开此次连接
		 {
		   parent.listen=null;              
		   parent.soc=null;
		   parent.list1.clear();
		   return;
		 }
		 StringTokenizer st=new StringTokenizer(msg,":");   //用StringTokenizer类来实现读取分段字符
		 String keyword=st.nextToken();                     //读取信息头即关键字用来识别是何种信息

		 if(keyword.equals("PEOPLE"))                      //如果是PEOPLE则是服务器发来的客户连接信息
		                                                   //主要用来刷新客户端的用户列表
			{
		     parent.list1.clear();
			 while(st.hasMoreTokens())                     //遍历st取得目前所连接的客户
				{
			     String str=st.nextToken();
				 parent.list1.addItem(str);
			 }
		 }
		 else if(keyword.equals("MSG"))                   //如果关键字是MSG则是服务器传来的聊天信息
		                                                  //主要用来刷新客户端聊天信息区将每个客户的聊天内容显示出来
			{
		     String usr=st.nextToken();
			 parent.chat_txt.appendText(usr);
			 parent.chat_txt.appendText(st.nextToken("\0"));
			 parent.chat_txt.appendText("\n\n");
		 }
		 else if(keyword.equals("QUIT"))                //如果关键字是QUIT则是服务器关闭的信息
		                                                //用来切断此次连接
			{
		     System.out.println("Quit");
		     try
		     {parent.listen.stop();
		      parent.listen=null;
		      parent.soc.close();
			  parent.soc=null;
             }catch(IOException e)
             {
             	System.out.println("Error:"+e);
             	}
			  parent.list1.clear();
			 
			 return;
		 }
	  }

 }     //end of run method
}      //end of Listen inner class

这是我以前写的，可能对你有所帮助

[刘彬彬]

先发个自己亲手写的客户端：
mport java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

public class ChatClient extends Frame {
Socket s = null;
DataOutputStream dos =null;
TextField tfTxt = new TextField();

TextArea taContent = new TextArea();

public static void main(String[] args) {
new ChatClient().launch();
}

public void launch() {
setLocation(300, 400);
setSize(300, 300);
add(tfTxt, BorderLayout.SOUTH);
add(taContent, BorderLayout.NORTH);
pack();
this.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {
disconnect();
System.exit(0);
}
});
tfTxt.addActionListener(new TFListener());
setVisible(true);
connection();
}

public void connection() {
try {
s = new Socket("192.168.0.55", 8888);
dos = new DataOutputStream(s.getOutputStream()); //你所要求的流！
System.out.println("connected");
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

}
public void disconnect(){
try {
dos.close();
s.close();
} catch (IOException e) {
e.printStackTrace();
}
}
private class TFListener implements ActionListener {

public void actionPerformed(ActionEvent e) {
String str = tfTxt.getText().trim();
taContent.setText(str);
tfTxt.setText("");
try {
dos.writeUTF(str);
dos.flush();
// dos.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}

}

}