talkclientcs.java

一个网上考试系统的客户端程序

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

public class TalkClientcs  
{
  JFrame jf;
	JPanel jp1;
	JPanel jp2;
	JPanel jp10;
	JPanel jp11;
	JPanel jp12;
	JPanel jp13;
	JPanel jp21;
	JPanel jp22;
	JPanel jp211;
	Checkbox a,b,c,d;
	CheckboxGroup cbg;
	JTextField jp22jtf,jp11jtf;
	TextArea jp21ta1,jp21ta2;
	Button jp211b1,jp211b2,jp211b3,jp11b,jp13b,jp2b;
	JLabel  jp1jl,jp2jl1,jp2jl2,jp2jl3;
	Choice ch;
	private PrintWriter output;
	private BufferedReader input;
	//private ServerSocket ss;
	private Socket Client;
	private String message="";
	String[] srl,srlst;
	boolean changed=false;
	int t=0;
	String daan,shijian;
	int df;
	StringBuffer ra=new StringBuffer("");
	StringBuffer ya=new StringBuffer("");
	int delay =3600;
	CardLayout card;
	Timer tx;
	//private int counter = 1;

	public TalkClientcs()
	{ 
		jf=new JFrame("英语标准化考试系统");
		jp1=new JPanel();
		jp2=new JPanel();
		jf.setSize(800,600);
		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jf.setLayout(new BorderLayout());
		createjp1();
	  jf.add(jp1,BorderLayout.WEST);
	  createjp2();
		jf.add(jp2,BorderLayout.CENTER);
		jf.setVisible(true);
		
	}
	void createjp1(){
			jp1.setSize(700,520);
			jp1.setLayout(new GridLayout(5,1));
			createjp10();
			jp1.add(jp10);
			createjp11();
			jp1.add(jp11);
			createjp12();
			jp1.add(jp12);
			jp1jl=new JLabel("选择一个文件以后，单击开始考试按纽",SwingConstants.CENTER);
			jp1jl.setVisible(false);
			jp1.add(jp1jl);
			createjp13();
			jp13.setVisible(false);
			jp1.add(jp13);
			}
	void createjp10(){
       	jp10=new JPanel();
       	jp10.setLayout(new FlowLayout(FlowLayout.CENTER));
       	jp10.add(new JLabel("输入服务器的IP或者域名，如192.168.0.218",SwingConstants.CENTER));
		    }
	void createjp11(){
		   jp11=new JPanel();
		   jp11.setLayout(new FlowLayout(FlowLayout.CENTER));
	     jp11jtf=new JTextField(15);
		   jp11.add(jp11jtf);
       jp11b=new Button("呼叫");
       jp11b.addActionListener(new ActionListener(){
       	public void actionPerformed(ActionEvent e) {
       		try{
       		if(!jp11jtf.getText().equals("")) 
       		    {Client=new Socket(jp11jtf.getText(),5000);
       		  if(Client.isConnected())
       		           {		
       		             jp2jl2.setText("您呼叫:"+jp11jtf.getText()+"成功");
				               card.show(jp12,"c2");
				               jp1jl.setVisible(true);
				               jp13.setVisible(true);
				             }
				      }       
				    }
				    catch(Exception e1)
		            {
			             e1.printStackTrace();
		             }
       		}
       	});
			 jp11.add(jp11b);

				}
				
	void createjp12(){
		   jp12=new JPanel();
		    card=new CardLayout();
		   jp12.setLayout(card);
		   jp2jl1=new JLabel("提示是否连接成功的标签",SwingConstants.CENTER);
		   jp2jl2=new JLabel("呼叫成功",SwingConstants.CENTER);
		   jp2jl3=new JLabel("呼叫不成功",SwingConstants.CENTER);
		   jp12.add(jp2jl1,"c1");
		   jp12.add(jp2jl2,"c2");
		   jp12.add(jp2jl3,"c3");
		   card.show(jp12,"c1");
		}
	void createjp13(){
		   jp13=new JPanel();
		   jp13b=new Button("将试题文件添加到下拉列表中");	   
		   jp13.add(jp13b);
		   jp13b.addActionListener(new ActionListener(){
       	public void actionPerformed(ActionEvent e) { 		
       		try{
       		getStreams();
       		output.println("Client>>要求发送试卷名");
       		output.flush();
       		message=input.readLine();
       		srl=message.split(",");
       		for(int i=0;i<srl.length;i++){
       			ch.addItem(srl[i]);
       			}
       		  }
       		  catch(Exception e2)
		            {
			             e2.printStackTrace();
		             }
       		}
       	});
		   ch=new Choice();
		   ch.addItem("");
//		   ch.addItem("1.txt");
//		   ch.addItem("2.txt");
//		   ch.addItem("3.txt");
//		   ch.addItem("java.txt");//remove(Component comp)
		   jp13.add(ch);
		}
	void createjp2(){	   
		   jp2=new JPanel();
		   jp2.setLayout(new BorderLayout());
		   jp2b=new Button("开始考试");	   
		   jp2b.addActionListener(new ActionListener(){
		   	public void actionPerformed(ActionEvent e){
		   		ActionListener taskPerformer = new ActionListener() {
          public void actionPerformed(ActionEvent evt) {
          	jp22.setVisible(true);
          	   if(delay==0) {jp22jtf.setText(Timep(delay));tx.stop();}
               jp22jtf.setText(Timep(delay)); delay--;
               if(delay==0){
               	try{
               		jp211b2.setEnabled(false);
       		        jp211b1.setEnabled(false);
               	  closeConnection();
               	   }
               	   catch(Exception e0)
		            {
			             e0.printStackTrace();
		             }
               	}  
          }
          };
		   		 tx=new Timer(1000, taskPerformer);
		   		 if(delay>0){tx.start();}
		   		}
		   	}); 	
		   jp2b.addActionListener(new ActionListener(){
       	public void actionPerformed(ActionEvent e) {
       		
       		try{
       		jp21ta2.setText("您选择了试题:"+ch.getSelectedItem()+"\n");
       		jp21.setVisible(true);
       		output.println("Client>>要求发送试卷内容");
       		output.flush();
       		output.println(ch.getSelectedItem());
       		output.flush();
       		message=input.readLine();
       		daan=message;
       		message=input.readLine();
       		shijian=message;
       		delay=Integer.parseInt(shijian)*60;
       		message=input.readLine();     		
       		srlst=message.split("##");
       		System.out.println("问题的length="+srlst.length);
       		//发完以后立刻关闭socket
       		output.close();
		      input.close();
		      Client.close();
       		for(int m=0;m<srlst.length;m++)
       		{System.out.println(srlst[m]);}
       		  }
       		catch(Exception e3)
		            {
			             e3.printStackTrace();
		             }
       		}
       	});     	
		   jp2.add(jp2b,BorderLayout.NORTH);
		   createjp21();
		   jp2.add(jp21,BorderLayout.CENTER);
		   jp21.setVisible(false);
		   createjp22();
		   jp2.add(jp22,BorderLayout.SOUTH);
		   jp22.setVisible(false);
		 }
	void createjp21(){
		   jp21=new JPanel();
		   jp21.setLayout(new BorderLayout(3,3));
		   jp21ta1=new TextArea("单击查看得分按钮，可以在这里看到得分和正确答案");
		   jp21ta1.setForeground(Color.RED);
		   jp21ta2=new TextArea("你选择了java.txt");
		   jp21.add(jp21ta1,BorderLayout.NORTH);
		   jp21.add(jp21ta2,BorderLayout.CENTER);
		   createjp211();
		   jp21.add(jp211,BorderLayout.SOUTH);
		}
  void createjp211(){
  	   jp211=new JPanel();
  	   cbg=new CheckboxGroup();
	     a=new Checkbox("A",cbg,true);
	     b=new Checkbox("B",cbg,false);
	     c=new Checkbox("C",cbg,false);
	     d=new Checkbox("D",cbg,false);
	     jp211.add(a);
		   jp211.add(b);
		   jp211.add(c);
		   jp211.add(d);
		   jp211b1=new Button("提交该题答案");
		   jp211b1.setEnabled(false);
		   jp211b1.addActionListener(new ActionListener(){
       	public void actionPerformed(ActionEvent e) {
       		String code=String.valueOf(daan.charAt(t));
       		String you=cbg.getSelectedCheckbox().getLabel();
          if(code.equalsIgnoreCase(you)){df++;}
          ra.append(code);ya.append(you);
          t++;
          jp211b1.setEnabled(false);
       		jp211b2.setEnabled(true);
       		}
       	});
		   jp211b2=new Button("读取下一题");
		   jp211b2.addActionListener(new ActionListener(){
       	public void actionPerformed(ActionEvent e) {
       		try{
       		if(t==srlst.length) {
       			t=0;
       			closeConnection();
       			jp211b2.setEnabled(false);
       		  jp211b1.setEnabled(false);
       		                     }
       		    else{
       		  jp21ta2.setText(srlst[t]);      		  
       		  jp211b2.setEnabled(false);
       		  jp211b1.setEnabled(true);
       		        }
       		  }
       		  catch(Exception e4)
			         {
				         e4.printStackTrace();
			         }
       		}
       	});
		   jp211b3=new Button("查看得分");
		   jp211b3.addActionListener(new ActionListener(){
       	public void actionPerformed(ActionEvent e) {    		
       		jp21ta1.setText("分数："+df+"\n"+"正确答案："+ra.toString()+"\n"+"你的答案："+ya.toString()+"\n");
       		}
       	});
		   jp211.add(jp211b1);
		   jp211.add(jp211b2);
		   jp211.add(jp211b3);
  	}
	void createjp22(){
	     jp22=new JPanel();   
	     jp22.setLayout(new FlowLayout(FlowLayout.CENTER)); 
		   jp22jtf=new JTextField("显示考试用时(倒计时)",20);
		   jp22jtf.setForeground(Color.RED);
		   jp22.add(jp22jtf);
		}
  String Timep(int miao){
		StringBuffer guodu=new StringBuffer("考试剩余时间:");
		int xiaoshi=miao/3600;
		int xiaoshihou=miao%3600;
		int fenzhong=xiaoshihou/60;
		int fenzhonghou=xiaoshihou%60;
		guodu.append(String.valueOf(xiaoshi));
		guodu.append("小时");
		guodu.append(String.valueOf(fenzhong));
		guodu.append("分钟");
		guodu.append(String.valueOf(fenzhonghou));
		guodu.append("秒");
		return guodu.toString();
		}
	private void getStreams() throws IOException
	{
		output = new PrintWriter(Client.getOutputStream());
		input = new BufferedReader(new InputStreamReader(Client.getInputStream()));		
	}

	private void processConnection() throws IOException
	{
		do{
			try{
				//要做的首先是显示jp1的其他信息，然后再从服务器端读入文件名列表
				jp2jl2.setText("您呼叫:"+jp11jtf.getText()+"成功");
				card.show(jp12,"c2");
				jp1jl.setVisible(true);
				//这里先显示,等按下去以后再在后面做读
				jp13.setVisible(true);
				
			}
			catch(Exception e)
			{
				e.printStackTrace();
			}
		}
		while(!message.equals("CLIENT>> bye"));
	}

	private void closeConnection() throws IOException
	{ 
		ra.replace(0,ra.length(),daan);
		jp21ta2.setText("考试结束");
		//output.close();
	//	input.close();
		//Client.close();
	}
	public static void main(String args[]) throws Exception
	{
		TalkClientcs tccs = new TalkClientcs();

		tccs.jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
};