studentsframe.java

由java编写的学生选课管理系统

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


/**
   a student frame with menus

public class StudentsFrameTest 
{
	public static void main(String[] args)
	{
	  StudentsFrame myFrame = new StudentsFrame();
	  myFrame.setVisible(true);
	  myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}
*/

public class StudentsFrame extends JFrame
{
	public StudentsFrame()
	{
	  setTitle("学生选课管理系统（学生）");
	  setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
	  setLocation(350, 200);
	  setResizable(false);
	
	  //add menu bar
	  JMenu systemMenu = new JMenu("系统维护");
	  systemMenu.add(new StudentMenuAction("修改密码", new ImageIcon("01.gif")));
	  systemMenu.add(new 
	    AbstractAction("退出系统", new ImageIcon("02.gif"))
	    {
	    	public void actionPerformed(ActionEvent e)
	  	  {
	  	  	System.exit(0);
	    	}
	    });
	  
	  JMenu functionMenu = new JMenu("功能选项");
	  functionMenu.add(new StudentMenuAction("课程修读"));
	  functionMenu.add(new StudentMenuAction("选课申请"));
	  functionMenu.add(new StudentMenuAction("成绩查询"));   
	  functionMenu.add(new StudentMenuAction("个人信息"));
	
	  JMenu helpMenu = new JMenu("帮助");
	  helpMenu.add(new StudentMenuAction("说明"));
	  helpMenu.add(new StudentMenuAction("关于"));
	  
	  //add all top-level menus to menu bar
	  JMenuBar myMenuBar = new JMenuBar();
	  setJMenuBar(myMenuBar);
	  myMenuBar.add(systemMenu);
	  myMenuBar.add(functionMenu);
	  myMenuBar.add(helpMenu);
	  
	  //add welcome panel
	  
	  
	  JLabel welcomeLabel = new JLabel("欢迎使用学生信息管理系统", SwingConstants.CENTER);
    welcomeLabel.setFont(new Font("TimesRoman",Font.BOLD,30));
    welcomeLabel.setForeground(Color.RED);
    
    //创建各个菜单面板
    StudentPanel modifyPasswordPanel = new StudentPanel(0); 
    //StudentPanel classesPanel = new StudentPanel(1);
    StudentPanel courseApplyPanel =new StudentPanel(2);
    StudentPanel selfInfoPanel = new StudentPanel(4);
    
    
     //添加各个卡片
	  myPanel = new JPanel();           
	  card = new CardLayout();
	  myPanel.setLayout(card);
	  myPanel.add(welcomeLabel, "welcomeLabel");
	  myPanel.add(modifyPasswordPanel, "modifyPasswordPanel");
	  //myPanel.add(classesPanel, "classesPanel");     //此语句加入到监听器方法中了，目的是可以选课后及时更新
	  //myPanel.add(gradePanel,"gradePanel");
	  myPanel.add(courseApplyPanel, "courseApplyPanel");
	  myPanel.add(selfInfoPanel, "selfInfoPanel");
	  
	  
	  add(myPanel);
	  validate();
	  
	}
	

	


/**
  the menu action listener
*/
  private class StudentMenuAction extends AbstractAction
  {
  	// 两个构造器
	  public StudentMenuAction(String name)
	  {
	  	super(name);
		
  	}
	
	
		  public StudentMenuAction(String name, Icon icon)
	  {
		
		  super(name, icon);
	  }
	
   	//  the action performed method
	  public void actionPerformed(ActionEvent e)
	  {
	  	if(getValue(Action.NAME).equals("修改密码"))
	  	{
	  		card.show(myPanel, "modifyPasswordPanel");
		  }
		
	  	else if(getValue(Action.NAME).equals("课程修读"))         //哈哈 389页如何得到字符串
	  	{
	  		StudentPanel classesPanel = new StudentPanel(1);
	  		myPanel.add(classesPanel, "classesPanel");
			  card.show(myPanel, "classesPanel");
		  }
		  
		  else if(getValue(Action.NAME).equals("选课申请"))
		  { 
		  	
		  	card.show(myPanel, "courseApplyPanel");
		  	
		  }
		  else if(getValue(Action.NAME).equals("成绩查询"))
		  { 
		  	StudentPanel gradePanel = new StudentPanel(3);
		  	myPanel.add(gradePanel, "gradePanel");
		  	card.show(myPanel, "gradePanel");
		  	
		  }
		  else if(getValue(Action.NAME).equals("个人信息"))
		  {
		  	card.show(myPanel, "selfInfoPanel");
		  }
		
		
		
		
		  else if(getValue(Action.NAME).equals("关于"))
		  {
		  	JOptionPane.showMessageDialog(StudentsFrame.this, 
		    		  "        作者：李常友\n指导老师：龙毅宏", 
		    		  "作品信息",
		    		  JOptionPane.INFORMATION_MESSAGE,
		    		  new ImageIcon("01.gif"));
		  		 
		    		 return;
	  	}
		
		  else if(getValue(Action.NAME).equals("说明"))
		  {
		  	String s =  "        本系统是用JAVA语言编写的，可以在\n"
                   +"任何安装了相应的JAVA虚拟机的系统使用。\n";
                 
                
	      JOptionPane.showMessageDialog(StudentsFrame.this, s, "使用说明", 
	                                    JOptionPane.INFORMATION_MESSAGE,
	                                    new ImageIcon("02.gif"));
	      return;
		  }
	  }
  }
  
  
  private static final int DEFAULT_WIDTH = 450;
	private static final int DEFAULT_HEIGHT = 300;
	private CardLayout card;
	private JPanel myPanel;
	
}