日期:2014-05-20  浏览次数:20653 次

新手白白的问题
package   socket;

import   java.io.*;
import   java.net.*;
import   java.awt.*;
import   java.awt.event.*;

public   class   MyClient   extends   Frame   implements   ActionListener
{
public   static   void   main(String[]   args)   {
new   MyClient();
}

Socket   clientSocket;
PrintStream   os;
BufferedReader   is;
String   s;
TextArea   receArea,sendArea;
Button   myButton   =   new   Button( "发送 ");
public   MyClient()
{
setTitle( "Client   Window ");
setLayout(new   BorderLayout());
this.addWindowListener(new   WinAdptClient(this));
myButton.addActionListener(this);
receArea   =   new   TextArea(10,50);
sendArea   =   new   TextArea(10,50);
//add( "North ",myLabel);
add( "South ",myButton);
add( "North ",receArea);
add( "Center ",sendArea);
setResizable(false);
pack();
setVisible(true);  
connect();
}

public   void   connect()
{
try
{
clientSocket   =   new   Socket( "MyHost ",8888);

os   =   new   PrintStream(
new   BufferedOutputStream(clientSocket.getOutputStream()));
is   =   new   BufferedReader(new   InputStreamReader(clientSocket
.getInputStream()));
while(true){
try{
s   =   is.readLine();
receArea.append(s+ "\n ");
}catch(Exception   e){
break;
}
}
//receArea.setText( "rece   over ");
}
catch(Exception   e){
System.out.println( "rece   error ");
}
}

public   void   actionPerformed(ActionEvent   e)
{
if(e.getSource()   ==   myButton)
{
try
{
System.out.println(receArea.getText());
os.print(sendArea.getText());
os.flush();
sendArea.setText( " ");
}
catch(Exception   ex){}
}
}


}

class   WinAdptClient   extends   WindowAdapter
{
MyClient   m_Parent;

WinAdptClient(MyClient   p)
{
m_Parent   =   p;
}

public   void   windowClosing(WindowEvent   e)
{
try
{
m_Parent.os.println( "Bye ");
m_Parent.os.flush();
m_Parent.is.close();
m_Parent.os.close();
m_Parent.clientSocket.close();
m_Parent.dispose();
System.exit(0);
}
catch(Exception   ex){
System.out.println( "error   close ");
}
}
}

1.s   =   is.readLine();
这如果没有数据,就会导致阻塞;
那么如果这个时候我点了界面上的“X”关闭窗口,会运行m_Parent.is.close();
但是这个时候is被阻塞了,导致is.close()也阻塞了,无法关闭窗口了,怎么解决比较地道???
我想了两种方法,一是设置超时时间;二是直接exit(0)了,不去一个个关流了。
不知道够不够地道?

2.os.print(sendArea.getText());
os.flush();
不能发送数据出去,但是点关闭以后,所有的数据都一次发过去了,就如同os.flush();没有起作用一样。
但是把sendArea替换为receArea,就正常了。不知道怎么回事?


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