socket通信问题

Question

想写一个一人对一人的聊天程序可是遇到了些问题;
这是客户端代码，其中send是一个发送按钮，想按下后把文本域中的内容发出 
且定义了 TextField serverMessage;和TextArea messageDisplay想把从服务器端
的内容在messageDisplay上显示出来。可是老是失败。经过测试发现1，2处的打印语句始终不能运行。望高手能给我分析一下原因。谢谢先~~客户端代码
public void runClient()
{
  try
   {
    final Socket s=new Socket(InetAddress.getByName("localhost"),6000);
    final OutputStream os=s.getOutputStream();
    final InputStream is=s.getInputStream();

    send.addActionListener(new ActionListener()
    {
     public void actionPerformed(ActionEvent e)
     {
      try
{ String str=serverMessage.getText();

os.write(str.getBytes());
         System.out.println(str);//-----------1

}
} catch(IOException ioe){}
}
});        os.write("This is Client".getBytes());
        byte[] buf=new byte[1024];
        int length=is.read(buf);
        messageDisplay.append(new String(buf,0,length));
os.close();
is.close();
s.close();
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
服务器端代码
public void runServer()
{
 try
 {
 final ServerSocket ss=new ServerSocket(6000);//设置服务端口号
 final Socket s=ss.accept();
 final OutputStream os=s.getOutputStream();
 final InputStream is=s.getInputStream();

 send.addActionListener(new ActionListener()
{
 public void actionPerformed(ActionEvent e)
 {
 try
 {
   String str=clientMessage.getText();
   os.write(str.getBytes());
   System.out.println(clientMessage.getText());//-----------------2  }
  catch(IOException ioe){}
  }
  });

  os.write("This is Server".getBytes());
  byte[] buf=new byte[1024];
  int length=is.read(buf);
  messageDisplay.append(new String(buf,0,length));  os.close();
  is.close();
  s.close();
  ss.close();
  }
  catch(Exception ex)
  {
     ex.printStackTrace();
  }
}

Answer 1

String str=clientMessage.getText();
和
   String str=serverMessage.getText();
上面的clientMessage和serverMessage是如何获取的？
最好全部贴出来吧……

Answer 2

恩，好的
Server.java
import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.awt.*;
import java.net.*;
import java.io.*;public class Server
{
JTextArea messageDisplay=new JTextArea(11,8);
JTextField clientMessage;
JLabel sendToLabel;
JButton send;
JButton close;
  JPanel myPanelCenter=new JPanel();
JPanel myPanelDown=new JPanel();
GridBagLayout gridBag=new GridBagLayout();
GridBagConstraints gridBagCon=new GridBagConstraints();

  public void init()
{
  messageDisplay.setLineWrap(true);
  
  myPanelCenter.setLayout(gridBag);
gridBagCon.gridx=0;
gridBagCon.gridy=0;
gridBagCon.anchor=GridBagConstraints.CENTER;
gridBagCon.insets=new Insets(3,3,3,3);
sendToLabel=new JLabel("SendMessage:");
gridBag.setConstraints(sendToLabel,gridBagCon);
myPanelCenter.add(sendToLabel);

gridBagCon.gridx=1;
gridBagCon.gridy=0;
clientMessage=new JTextField(25);
gridBagCon.insets=new Insets(5,1,5,5);
gridBagCon.anchor=GridBagConstraints.NORTH;
      gridBag.setConstraints(clientMessage,gridBagCon);
myPanelCenter.add(clientMessage);

myPanelDown.setLayout(gridBag);
gridBagCon.gridx=0;
gridBagCon.gridy=0;
gridBagCon.gridwidth=2;
gridBagCon.anchor=GridBagConstraints.NORTH;
gridBagCon.insets=new Insets(3,3,3,20);
send=new JButton("Send");
gridBag.setConstraints(send,gridBagCon);
myPanelDown.add(send);

gridBagCon.gridx=3;
gridBagCon.gridy=0;
gridBagCon.gridwidth=2;
gridBagCon.insets=new Insets(3,20,3,3);
gridBagCon.anchor=GridBagConstraints.NORTH;
close=new JButton("Close");
gridBag.setConstraints(close,gridBagCon);
myPanelDown.add(close);
}

public void runServer()
{
try
{
final ServerSocket ss=new ServerSocket(6000);//设置服务端口号
final Socket s=ss.accept();
final OutputStream os=s.getOutputStream();
final InputStream is=s.getInputStream();

send.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
try
{
  String str=clientMessage.getText();
              System.out.println(str);
os.write(str.getBytes());
              System.out.println("Success");
}    catch(IOException ioe){}
}
});
os.write("This is Server".getBytes());
//os.write("This is Server".getBytes());//参数是字节流

//byte[] buf=new byte[100];
//int length=is.read(buf);
//System.out.println(new String(buf,0,length));

byte[] buf=new byte[1024];
int length=is.read(buf);
messageDisplay.append(new String(buf,0,length));
os.close();
is.close();
s.close();
ss.close();
}
catch(Exception ex)
{
ex.printStackTrace();
}
}

public static void main(String[] args)
{
final JFrame f=new JFrame("Server");
Server s=new Server();
s.init();
s.runServer();
f.setLayout(new BorderLayout());
s.messageDisplay.setEditable(false);
f.getContentPane().add(s.messageDisplay,BorderLayout.NORTH);
f.getContentPane().add(s.myPanelCenter,BorderLayout.CENTER);
f.getContentPane().add(s.myPanelDown,BorderLayout.SOUTH);
    f.setSize(400,300);
    f.setResizable(false);
    f.pack();
    f.show();
    
    s.close.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
f.dispose();
System.exit(0);
}
});

    f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);
 }
}////////////////////////////////////////////////////////////////////////////////
Client.javaimport javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.awt.*;
import java.net.*;
import java.io.*;public class Client
{
JTextArea messageDisplay=new JTextArea(11,8);
JTextField serverMessage;
JLabel sendToLabel;
JButton send;
JButton close;
  JPanel myPanelCenter=new JPanel();
JPanel myPanelDown=new JPanel();
GridBagLayout gridBag=new GridBagLayout();
GridBagConstraints gridBagCon=new GridBagConstraints();

  public void init()
{
  messageDisplay.setLineWrap(true);
  
  myPanelCenter.setLayout(gridBag);
gridBagCon.gridx=0;
gridBagCon.gridy=0;
gridBagCon.anchor=GridBagConstraints.CENTER;
gridBagCon.insets=new Insets(3,3,3,3);
sendToLabel=new JLabel("SendMessage:");
gridBag.setConstraints(sendToLabel,gridBagCon);
myPanelCenter.add(sendToLabel);

gridBagCon.gridx=1;
gridBagCon.gridy=0;
serverMessage=new JTextField(25);
gridBagCon.insets=new Insets(5,1,5,5);
gridBagCon.anchor=GridBagConstraints.NORTH;
      gridBag.setConstraints(serverMessage,gridBagCon);
myPanelCenter.add(serverMessage);

myPanelDown.setLayout(gridBag);
gridBagCon.gridx=0;
gridBagCon.gridy=0;
gridBagCon.gridwidth=2;
gridBagCon.anchor=GridBagConstraints.NORTH;
gridBagCon.insets=new Insets(3,3,3,20);
send=new JButton("Send");
gridBag.setConstraints(send,gridBagCon);
myPanelDown.add(send);

gridBagCon.gridx=3;
gridBagCon.gridy=0;
gridBagCon.gridwidth=2;
gridBagCon.insets=new Insets(3,20,3,3);
gridBagCon.anchor=GridBagConstraints.NORTH;
close=new JButton("Close");
gridBag.setConstraints(close,gridBagCon);
myPanelDown.add(close);
}

public void runClient()
{
try
{
final Socket s=new Socket(InetAddress.getByName("localhost"),6000);//设置服务端口号
final OutputStream os=s.getOutputStream();
final InputStream is=s.getInputStream();

send.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
try
{
  String str=serverMessage.getText();
  System.out.println(str);
  os.write(str.getBytes());

System.out.println("Success");

}    catch(IOException ioe){}
}
});
os.write("This is Client".getBytes()); //os.write("This is Server".getBytes());//参数是字节流

//byte[] buf=new byte[100];
//int length=is.read(buf);
//System.out.println(new String(buf,0,length));

byte[] buf=new byte[1024];
int length=is.read(buf);
messageDisplay.append(new String(buf,0,length));
os.close();
is.close();
s.close();
}
catch(Exception ex)
{
ex.printStackTrace();
}
}

public static void main(String[] args)
{ 
  Client c=new Client();
final JFrame f=new JFrame("Client");
c.init();
c.runClient();
f.setLayout(new BorderLayout());
c.messageDisplay.setEditable(false);
f.getContentPane().add(c.messageDisplay,BorderLayout.NORTH);
f.getContentPane().add(c.myPanelCenter,BorderLayout.CENTER);
f.getContentPane().add(c.myPanelDown,BorderLayout.SOUTH);
    f.setSize(400,300);
    f.setResizable(false);
    f.pack();
    f.show();
    
    c.close.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
f.dispose();
System.exit(0);
}
});

    f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);
 }
}编译通过，但是不能互发消息阿~~求救各位高手~~~~

Answer 3

监听器都是多线程的，所以你两个程序都过早关闭Socket s 了最好用传参数的方法新建一个监听器类，这样就可以去掉那些完全没必要的“final”修饰了
close（）方法放进finally块里面，不要直接接在加载监听器的后面

Answer 4

错了，错了，你这个根本不是网络编程的路子，简易LZ烟酒烟酒java.net包的API