/*
 * Created on 2005-12-6
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */

/**
 * @author tian
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
import java.net.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class stuFind extends Applet implements Runnable,ActionListener
{ 
  TextField 輸入查詢內容;                             
  Choice choice=null;                                 
  Checkbox  完全一致,前方一致,后方一致,中間包含;      
  CheckboxGroup group=null;
  Button 查詢;
  TextArea 顯示查詢結果;
  Label 提示條;
  Socket socket=null;
  DataInputStream in=null;
  DataOutputStream out=null;
  PrintWriter pw=null;;//????又添加。/////////////////
  Thread thread; 
 public void init()
 {
  輸入查詢內容=new TextField(18);
  查詢=new Button("查詢");
  choice=new Choice();
  choice.add("學號");
  choice.add("姓名");
  choice.add("入學年份");
  choice.select(0);
  group=new CheckboxGroup();
  完全一致=new Checkbox("完全一致",true,group);
  前方一致=new Checkbox("前方一致",false,group);
  后方一致=new Checkbox("后方一致",false,group);
  中間包含=new Checkbox("中間包含",false,group);
  顯示查詢結果=new TextArea(20,100);
  提示條=new Label("正在連接到服務器,請稍等...",Label.CENTER);
  提示條.setForeground(Color.red);
  提示條.setFont(new Font("TimesRoman",Font.BOLD,24));
  Panel box1=new Panel();                 
  box1.add(new Label("輸入查詢內容:",Label.CENTER));
  box1.add(輸入查詢內容); 
  box1.add(choice); 
  box1.add(查詢);
  Panel box2=new Panel();                
  box2.add(new Label("選擇查詢條件:",Label.CENTER));
  box2.add(完全一致);
  box2.add(前方一致);
  box2.add(后方一致);
  box2.add(中間包含); 
  Panel box3=new Panel();             
  box3.add(new Label("查詢結果:",Label.CENTER));
  box3.add(顯示查詢結果);
  add(提示條);
  add(box1);
  add(box2);
  add(box3); 
  查詢.addActionListener(this);
 }
 public void start()
 { 
   if(socket!=null&&in!=null&&out!=null)
        {  try
              {
                socket.close();
                in.close(); 
                out.close();
              }
          catch(Exception ee)
              {
              }
        }
     try
        {
          socket=new Socket(this.getCodeBase().getHost(), 6664);
          in=new DataInputStream(socket.getInputStream());
          out=new DataOutputStream(socket.getOutputStream());
	      pw = new PrintWriter(out,true);
        }
     catch (IOException ee)
        { 
          提示條.setText("連接失敗");
        }
     if(socket!=null)
        {
          InetAddress address=socket.getInetAddress();
          提示條.setText("連接:"+address+"成功");
        } 
     if(thread==null)
        {
          thread=new Thread(this);
          thread.start();
        }
 }
 public void stop()
   {
     try 
         {
           socket.close();
           thread=null;
         }
     catch(IOException e)
         {
          this.showStatus(e.toString());
         }
   }

 public void run()
 {
    String s=null;
    while(true)
     { 
       try{
             s=in.readUTF();
          }
        catch (IOException e)
          {
            提示條.setText("與服務器已斷開");
            break;
          }
     顯示查詢結果.append(s);
    
    }
 }
 public void actionPerformed(ActionEvent e)
 {
   if(e.getSource()==查詢)
     { 
       顯示查詢結果.setText(null);
       String s="";
       s=輸入查詢內容.getText();
       String 范疇=choice.getSelectedItem();       
       String 條件=group.getSelectedCheckbox().getLabel();
       if(s.length()>0)		      
        { 
          try{
              out.writeUTF(s+":"+范疇+":"+條件);
             }
          catch(IOException e1)
             {
              提示條.setText("與服務器已斷開");
             } 
        } 
       else
        {
          輸入查詢內容.setText("請輸入內容"); 
        }              
       
     }
 }
}