studentframe.java

连接测试系统

				   unfinishitem--;
				   break;
			   }
			   System.out.println("item index----"+randomindex);
		   }
		   ItemInfo radomiteminfo=iteminfo[randomindex];
		   String radomitemtype=radomiteminfo.getItemtype();
		   centerpanel.removeAll();
		   if("单选题".equals(radomitemtype))
			   centerpanel.add(new singleChoiceJPanel(radomiteminfo));
		   else if("多选题".equals(radomitemtype))
			   centerpanel.add(new multipleChoiceJPanel(radomiteminfo));
		   else if("对错题".equals(radomitemtype))
			   centerpanel.add(new TrueFalseJPanel(radomiteminfo));
		   else if("填空题".equals(radomitemtype))
			   centerpanel.add(new FillBlankJPanel(radomiteminfo));
		   else if("简答题".equals(radomitemtype))
			   centerpanel.add(new BriefAnswerJPanel(radomiteminfo));	
		   else System.out.println("无此题型");
		   centerpanel.validate();
	   }
	   else{
		   centerpanel.removeAll();
		   centerpanel.validate();
		   mainPanel.removeAll();
		   mainPanel.add(new JLabel("                 你已经完成测试,你本次的测试成绩为 "+testscore),BorderLayout.CENTER);
		   mainPanel.validate();
	   }
	}
	
	private void initGUI() {
		try {
			setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
			this.setTitle("\u8054\u673a\u6d4b\u8bd5\u7cfb\u7edf");
			this.setResizable(false);
			getContentPane().setLayout(null);
			{
				studentToolBar = new JToolBar();
				getContentPane().add(studentToolBar);
				studentToolBar.setBounds(0, 2, 100, 26);
				{
					starttestButton = new JButton(new ImageIcon("images/onlinetest.gif"));
					studentToolBar.add(starttestButton);
					starttestButton.setToolTipText("\u8bd5\u9898\u6d4b\u8bd5");
					starttestButton.addActionListener(new ActionListener() {
						public void actionPerformed(ActionEvent evt) {
							starttestButtonActionPerformed(evt);
						}
					});
				}
				{
					scoreAccountButton = new JButton(new ImageIcon("images/Account.gif"));
					studentToolBar.add(scoreAccountButton);
					scoreAccountButton.setToolTipText("\u6210\u7ee9\u7edf\u8ba1");
					scoreAccountButton.addActionListener(new ActionListener() {
						public void actionPerformed(ActionEvent evt) {
							scoreAccountButtonActionPerformed(evt);
						}
					});
				}
				{
					reconnectButton = new JButton(new ImageIcon("images/reconnect.gif"));
					studentToolBar.add(reconnectButton);
					reconnectButton.setToolTipText("重新连接服务器");
					reconnectButton.setEnabled(false);
					reconnectButton.addActionListener(new ActionListener() {
						public void actionPerformed(ActionEvent evt) {
							reconnectButtonActionPerformed(evt);
						}
					});
				}
			}
			{
				jScrollPane1 = new JScrollPane();
				getContentPane().add(jScrollPane1);
				jScrollPane1.setBounds(0, 34, 623, 419);
				{
					mainPanel = new JPanel();
					jScrollPane1.setViewportView(mainPanel);
					mainPanel.setPreferredSize(new java.awt.Dimension(620, 406));
				}
			}
			{
				studentMenuBar = new JMenuBar();
				setJMenuBar(studentMenuBar);
				{
					jMenu1 = new JMenu();
					studentMenuBar.add(jMenu1);
					jMenu1.setText("\u6587\u4ef6");
					{
						starttestMenuItem = new JMenuItem();
						jMenu1.add(starttestMenuItem);
						starttestMenuItem.setText("试题测试");
						starttestMenuItem.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent evt) {
								starttestButtonActionPerformed(evt);
							}
						});
					}
					{
						scoreAccountMenuItem = new JMenuItem();
						jMenu1.add(scoreAccountMenuItem);
						scoreAccountMenuItem.setText("\u6210\u7ee9\u7edf\u8ba1");
						scoreAccountMenuItem.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent evt) {
								scoreAccountButtonActionPerformed(evt);
							}
						});
					}
					{
						reconnectMenuItem = new JMenuItem();
						jMenu1.add(reconnectMenuItem);
						reconnectMenuItem.setText("\u91cd\u65b0\u8fde\u63a5");
						reconnectMenuItem.setEnabled(false);
						reconnectMenuItem.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent evt) {
								reconnectButtonActionPerformed(evt);
							}
						});
					}
					{
						exitMenuItem = new JMenuItem();
						jMenu1.add(exitMenuItem);
						exitMenuItem.setText("\u9000\u51fa");
						exitMenuItem.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent evt) {
								exitMenuItemActionPerformed(evt);
							}
						});
					}
				}
				{
					aboutMenu = new JMenu();
					studentMenuBar.add(aboutMenu);
					aboutMenu.setText("\u5173\u4e8e");
					{
						helpMenuItem = new JMenuItem();
						aboutMenu.add(helpMenuItem);
						helpMenuItem.setText("\u5e2e\u52a9");
						helpMenuItem.addActionListener(new ActionListener() {
							public void actionPerformed(ActionEvent evt) {
								mainPanel.removeAll();
								mainPanel.add(new AboutJPanel(),BorderLayout.CENTER);
								mainPanel.validate();
							}
						});
					}
				}
				{
					centerpanel=new JPanel();
					titlepanel=new JPanel();
					titlepanel.add(new JLabel("科目"));
					subjectcombobox = new JComboBox();
					titlepanel.add(subjectcombobox);
					titlepanel.add(new JLabel("难度系数"));
					difficulttfone=new JTextField();
					difficulttfone.setText("0          ");
					titlepanel.add(difficulttfone);
					titlepanel.add(new JLabel("到"));
					difficulttftwo=new JTextField();
					difficulttftwo.setText("1          ");
					titlepanel.add(difficulttftwo);
					submitbt=new JButton("提交");
					titlepanel.add(submitbt);
					submitbt.addActionListener(new ActionListener() {
						public void actionPerformed(ActionEvent evt) {
							String subjectstr=subjectcombobox.getSelectedItem().toString();
							float difone=0;
							float diftwo=1;					
							try {
								difone=Float.parseFloat(difficulttfone.getText());
								diftwo=Float.parseFloat(difficulttftwo.getText());
								if(difone>1||difone<0||diftwo<0||diftwo>1){
									JOptionPane.showMessageDialog(null,"难度系数为0-1的小数","错误",JOptionPane.ERROR_MESSAGE);
									return;
								}
								if(difone>diftwo){
									float tempdif=difone;
									difone=diftwo;
									diftwo=tempdif;
								}	
							}
							catch(Exception ex) { // only allow integer values
								Toolkit.getDefaultToolkit().beep();
								JOptionPane.showMessageDialog(null,"难度系数为0-1的小数","错误",JOptionPane.ERROR_MESSAGE);
								return;  
							}
							testscore=0;
							submitbt.setEnabled(false);
							String msg="GETQA:";
							if("全部".equals(subjectstr))
								msg=msg+"select * from item_info where difficulty>="+difone+" and difficulty<="+diftwo;
							else msg=msg+"select * from item_info where difficulty>="+difone+" and difficulty<="+diftwo+" and subject='"+subjectstr+"'";
							msg=new String(msg.getBytes());
							pswriter.println(msg);
							pswriter.flush();
							String QAstrinfo=null;
							try {
								QAstrinfo=bufreader.readLine();
								String[] QAstrarray=QAstrinfo.split("@_@");
								if("QA".equals(QAstrarray[0])){										
									itemsnumber=QAstrarray.length-1;
									unfinishitem=itemsnumber;
									iteminfo=new ItemInfo[itemsnumber];
									itemstate=new int[itemsnumber];	
									if(QAstrarray.length>1){
										for(int i=1;i<QAstrarray.length;i++){				
											System.out.println(QAstrarray[i]);
											String[] QAarray=QAstrarray[i].split("&_&");	
											int itemid=Integer.parseInt(QAarray[0]);
											String itemtype=QAarray[1];
											String content=QAarray[2];
											String answer=QAarray[3];
											int score=Integer.parseInt(QAarray[4]);
											int limittime=Integer.parseInt(QAarray[5]);
											String subject=QAarray[6];
											float difficulty=Float.parseFloat(QAarray[7]);
											iteminfo[i-1]=new ItemInfo(itemid,itemtype,content,answer,score,limittime,subject,difficulty);
											itemstate[i-1]=1;
										}
										NextItem();
									}
									else {
										JOptionPane.showMessageDialog(null,"无该条件下的试题，请重新选择测试条件","联机测试系统",JOptionPane.ERROR_MESSAGE);
										submitbt.setEnabled(true);
									}
								}
								else {
									JOptionPane.showMessageDialog(null,"试题获取失败","联机测试系统",JOptionPane.ERROR_MESSAGE);
									submitbt.setEnabled(true);
								}
							} catch (IOException e) {
								// TODO Auto-generated catch block
								e.printStackTrace();
								JOptionPane.showMessageDialog(null,"IO异常，请重新连接","联机测试系统",JOptionPane.ERROR_MESSAGE);
								submitbt.setEnabled(true);
								reconnectButton.setEnabled(true);
								reconnectMenuItem.setEnabled(true);
							}
							if(QAstrinfo==null){
								JOptionPane.showMessageDialog(null,"与服务器的连接已经中断，请重新连接","联机测试系统",JOptionPane.ERROR_MESSAGE);
								reconnectButton.setEnabled(true);
								reconnectMenuItem.setEnabled(true);
								return ;
							}
						}
					});
				}
			}
			pack();
			this.setSize(631, 514);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}
class FloatDocument extends PlainDocument {
	public void insertString(int offset, String s, 
							AttributeSet attributeSet) 
							throws BadLocationException {
		try {
			Float.parseFloat(s);
		}
		catch(Exception ex) { // only allow integer values
			Toolkit.getDefaultToolkit().beep();
			JOptionPane.showMessageDialog(null,"难度系数为0-1的小数","错误",JOptionPane.ERROR_MESSAGE);
			return;  
		}
		super.insertString(offset, s, attributeSet);
	}
}