Telnet乱码以及Awt显示问题！！！高分求解

hailang43 2007-12-24 04:41:41

做一个telnet客户端，模拟windows系统自带的telnet功能。
问题1：用tcp连接接收到的文件部分（特殊字符之类）是乱码。
问题2：我接到了包括乱码在内的很多数据，放到一个String打印的时候能看见，通过TextArea.setText（String）这样显示的只是部分乱码，很少的。
下面是代码：麻烦各位帮我看看，代码复制过去能直接运行的，搞定了给全分。



 package telnet;



import java.awt.BorderLayout;

import java.awt.Button;

import java.awt.Color;

import java.awt.Frame;

import java.awt.GridLayout;

import java.awt.Panel;

import java.awt.TextArea;

import java.awt.TextField;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.Socket;

import java.net.SocketTimeoutException;

import java.net.UnknownHostException;



@SuppressWarnings("serial")

public class Client extends Frame{

	BorderLayout bl= new BorderLayout();

	GridLayout  gl = new GridLayout();

	Panel north = new Panel();		          //上面的输入框和按钮

	Panel south = new Panel();                //下面的输入框和按钮

	Button btnNorth = new Button("输入您要连接的URL地址：");

	Button btnSouth = new Button("发送信息：");

	TextField tfNorth =new TextField();  //上面输入框

	TextField tfSouth =new TextField(); //下面输入框

	TextArea  ta = new TextArea();	   //中间显示框

	

	public Client(String title){

		super(title);

		setLayout(bl);

		setBounds(50, 50, 600,400);			

		north.setLayout(gl);

		south.setLayout(gl);

		ta.setEditable(false);		

		ta.setBackground(Color.black);

		ta.setForeground(Color.white);

		north.add(btnNorth);

		north.add(tfNorth);

		south.add(btnSouth);

		south.add(tfSouth);			

		add(north, BorderLayout.NORTH);

		add(south, BorderLayout.SOUTH);

		add(ta, BorderLayout.CENTER);

		setVisible(true);

		

		addWindowListener(new WindowAdapter(){

			public void windowClosing(WindowEvent evt){

				System.exit(0);

			}			

		});	



		//连接并接收返回数据

		btnNorth.addActionListener(new ActionListener(){

			public void actionPerformed(ActionEvent e) {	

				System.out.println("正在连接..........");

				String result=getInfo();		

                                System.out.println(result);       //能打印值

				ta.setText(result);      //出问题的地方。不能设置正确值

				setVisible(true);

				System.out.println("连接成功..........");

			}			

		});	

	//发送新数据并接收返回数据	

		btnSouth.addActionListener(new ActionListener(){

	        public void actionPerformed(ActionEvent e) {			

				getMore();

			}	

		});			

					

		}



	//连接到bbs

		public String getInfo() {

		// String url = tfNorth.getText();

		StringBuffer info = new StringBuffer("\r\n");            //临时 

		String result = null;      //接收并返回得到的数据

		try {

			// Socket s = new Socket(url, 23);

			Socket s = new Socket("bbs.nuc.edu.cn", 23);

			s.setSoTimeout(3000);               //连接3秒没数据到达就处理数据

			BufferedReader in = new BufferedReader(new InputStreamReader(s

					.getInputStream()));  //出现部分乱码

                        //DataInputStream in = new DataInputStream(s.getInputStream());//也乱码

			boolean flag = true;

			if (flag) {

				String line = in.readLine();

				if (line != null) {

					info.append(line + "\r\n");

				} else {

					flag = false;

				}				

			}

			 result = info.toString();

			return result;

		}catch(SocketTimeoutException e){		

			result = info.toString();

			return result;

		} catch (UnknownHostException e) {		

			e.printStackTrace();

			return new String("找不到主机！！！");

		} catch (IOException e) {		

			e.printStackTrace();

			return new String("网络异常！！！");

		}

		}	



		protected void getMore() {

			//未实现

		}

		

		public static void main(String[] args) {		

			new Client("telnet");

	}

		

	}