菜鸟盼望雷锋叔叔和雷锋阿姨的出现，谢谢了

Question

http://java.sun.com/j2se/1.4/docs/guide/security/jsse/samples/index.html
有例子，去看看

Answer 1

客户端的applet:import java.io.*;
import java.net.*;
import java.awt.*;public class webTalkClient extends java.applet.Applet
{
TalkClient kc=new TalkClient();
public void init()
{
add(kc);
kc.init();
} public void stop()
{ kc.stop();  }
}class TalkClient extends Panel implements Runnable
{
Thread kicker=null;
TextField user=new TextField(20);
TextField host=new TextField(20);
TextArea log=new TextArea(8,40);
TextField field=new TextField(40);
Button connect=new Button(" Connect ");
Button send=new Button(" Send ");
Button bye=new Button(" bye ");
Socket kkSocket=null;
PrintStream os;
DataInputStream is; public void init()
{
setLayout(new CardLayout());
Panel p=new Panel();
setFont(new Font("TimesRoman",Font.PLAIN,15));
Panel labels=new Panel();
Panel fields=new Panel();
labels.setLayout(new GridLayout(0,1,10,20));
fields.setLayout(new GridLayout(0,1,10,20));
        p.add(labels);
p.add(fields);
labels.add(new Label(""));
fields.add(new Label(""));
labels.add(new Label("User Name"));
fields.add(user);
labels.add(new Label("Host Name"));
fields.add(host);
labels.add(new Label(""));
fields.add(connect);
add("login",p); Panel p1=new Panel();
p1.setLayout(new BorderLayout());
Panel p2=new Panel();
log.setEditable(false);
p2.add(log);
p1.add("North",p2);
Panel p3=new Panel();
p3.setLayout(new BorderLayout());
Panel p4=new Panel();
p4.add(send);
p4.add(new Label(" "));
p4.add(bye);
p3.add("North",field);
p3.add("Center",p4);
p1.add("Center",p3);
add("send",p1);
} public void stop()
{
if(kicker!=null) kicker.stop();
if(kkSocket!=null)
{
sendData("Bye");
try
            { Thread.sleep(100);    }
catch(InterruptedException e){}
closeSocket();
}
} public void run()
{
String fromServer=null;
while((fromServer=getData())!=null)
log.appendText(fromServer+"\n");
kicker=null;
closeSocket();
((CardLayout)getLayout()).show(this,"login");
}   /*初始化连接服务器*/
boolean connectHost(String hostName)
{
try
{
kkSocket=new Socket(hostName,4700);
os=new PrintStream(kkSocket.getOutputStream());
is=new DataInputStream(kkSocket.getInputStream());
}
catch(UnknownHostException e)
{
log.setText("Trying to connect to unknown host:"+e);
System.out.println("Trying to connect to unknown host:"+e);
return false;
}
catch(Exception e)
{
log.setText("Exception:"+e);
System.out.println("Exception:"+e);
return false;
}
return true;
}    /*从服务器取得数据*/
String getData()
{
String fromServer;
try
{
 fromServer=is.readLine();
}
catch(Exception e)
{
log.setText("Exception :"+e);
return null;
}
return fromServer;
}    /*向服务器发送数据*/
boolean sendData(String toServer)
{
try
{
os.println(toServer);
os.flush();        
}
catch(Exception e)
{
log.setText("Exception:"+e);
return false;      
}
return true;
} void closeSocket()
{
try
{
os.close();
is.close();
kkSocket.close();
kkSocket=null;
}
catch(Exception e)
{ log.setText("Exception :"+e);   }
} public boolean action(Event e,Object arg)
{
switch(e.id)
{
case Event.ACTION_EVENT:
if(e.target==connect)
{
if(connectHost(host.getText()))
{
sendData(user.getText());
kicker=new Thread(this);
kicker.start();
log.setText(" ");
field.setText(" ");
((CardLayout)getLayout()).show(this,"send");
}
return true;
}
else if(e.target==send)
{
if(!sendData(" "+field.getText()))
{
kicker.stop();
kicker=null;
closeSocket();
((CardLayout)getLayout()).show(this,"login");
}
return true;
}
else if(e.target==bye)
{
kicker.stop();
kicker=null;
sendData("Bye");
closeSocket();
((CardLayout)getLayout()).show(this,"login");
return true;
}
break;
}
return false;
}
}服务器端的applet://webTalkServer.java
import java.io.*;
import java.net.*;
import java.awt.*;class webTalkServer extends java.applet.Applet implements Runnable
{
Thread kicker=null;
    /*线程组用来管理多个用户的情况*/
ThreadGroup dealGroup;  //文本域用于显示每个用户所发送的信息
TextArea log=new TextArea(4,30);  //列表框列出所有的用户
List list=new List();
int number=0; public void init()
{
setLayout(new BorderLayout());
Panel p1=new Panel();
log.setEditable(false);
p1.add("log",log);
add("North",p1);
Panel p2=new Panel();
p2.add("label",new Label("User List"));
p2.add("list",list);
add("Center",p2);
} public void start()
{
dealGroup=new ThreadGroup("DealThreads");
kicker=new Thread(this);
kicker.start();
} public void stop()
{
kicker.stop();
kicker=null;
dealGroup.stop();
} public void run()
{
ServerSocket serverSocket=null;
Socket clientSocket;
try
{ serverSocket=new ServerSocket(4700); }
catch(IOException e){
System.out.println("Could not listen on port "+4700+","+e);
return;}
try{
do{
clientSocket=serverSocket.accept();
(new DealThread(dealGroup,this,clientSocket,++number)).start();
}while(true);}
catch(IOException e){
System.out.println("Accept failed:"+4700+","+e);
return;}
} public synchronized void appendTipsText(String message)
{ log.appendText(message);   } public synchronized void addUser(String username)
{   list.addItem(username);     }    /*在用户退出时，从列表况中删除该用户*/
public synchronized void delUser(String username)
{
int count,i;
count=list.countItems();
for(i=0;i<count;i++)
if(username.equals(list.getItem(i)))
{   list.delItem(i);   break;  }
} public static void main(String[] args)
{
webTalkServer kkserver=new webTalkServer();
kkserver.init();
kkserver.start();
SFrame f=new SFrame("webTalkServer",kkserver);
f.setResizable(false);
f.setBackground(Color.lightGray);
f.add("Center",kkserver);
f.resize(300,200);
f.show();
}
}class DealThread extends Thread
{
webTalkServer kkserver;
Socket clientSocket;
BufferedReader is;
PrintWriter os;
String userName;
int number; public DealThread(ThreadGroup dealGroup,
                   webTalkServer kkserver,Socket clientSocket,int number)
{
super(dealGroup,"DealGroup");
this.kkserver=kkserver;
this.clientSocket=clientSocket;
this.number=number;
} public void run()
{
try{
            /*创建接收来自Client端信息的输入流*/
is=new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
            /*创建向Client端发送数据的输出流*/
os=new PrintWriter(new OutputStreamWriter(clientSocket.getOutputStream()));
String fromClient=null,toClient=null;
boolean first=true,bye=false;
userName=getData();
            /*该线程启动后，调用主类的方法加入该Client端成员*/
kkserver.addUser("["+userName+"]-"+number);
do{
int count,i;
if(first)   toClient="Use["+userName+"]join";
             /*该Client端用户退出，则删除之，并向其它成员发送信息*/
else if(fromClient.equals("Bye")){
bye=true;
kkserver.delUser("["+userName+"]-"+number);
toClient="User["+userName+"]say bye";}
else toClient="From["+userName+"]:"+fromClient;
kkserver.appendTipsText(toClient+"\n");
                /*调用Thread类的方法activeCount（）检查当前活动线程数*/
count=activeCount();
Thread threads[]=new Thread[count];
/*调用Thread类的enumerate（Thread T[]）方法将线程组dealGroup     中所有活动线程的引用填入线程数组threads[]中*/
enumerate(threads);
for(i=0;i<count;i++)
if(threads[i]!=this){
                 /*非本线程的每一个线程组成员向该线程发送信息*/
((DealThread)(threads[i])).sendData(toClient);
if(first)
sendData("User["+((DealThread)(threads[i])).getUserName()+
                                 "]say hello to you");}
first=false;
if(bye) break;
}while((fromClient=getData())!=null);
os.close();
is.close();
clientSocket.close();
}
catch(IOException e)
{ e.printStackTrace();   }
} synchronized String getUserName()
{ return userName;  } String getData()
{
String fromClient;
try
{  fromClient=is.readLine();  }
catch(Exception e) {
System.out.println("Exception :"+e);
return null;   }
return fromClient;
} synchronized boolean sendData(String toClient)
{
try{
os.println(toClient);
os.flush();   }
catch(Exception e) {
System.out.println("Exception :"+e);
return false;  }
return true;
}
}class SFrame extends Frame
{
webTalkServer kkserver;
public SFrame(String Name,webTalkServer kkserver)
{
super(Name);
this.kkserver=kkserver;
} public boolean handleEvent(Event e)
{
switch(e.id){
case Event.WINDOW_DESTROY:
kkserver.stop();
kkserver.destroy();
System.exit(0);}
return super.handleEvent(e);
}
}自己加上两个.htm试试

Answer 2

oh,it"s so easy!!楼上的程序是不是还有点过场亚？ ：）