studentmanager.java

成绩分析器 可以用来实现一些相关功能

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.Hashtable;
public class StudentManager extends JFrame implements ActionListener{
   	StudentSituation baseInformationSave=null;          
   	ModifySituation  baseInformationModify=null;          
   	Inquest          baseInformationSearch=null; 
   	Delete           baseInformationDelete=null;
   	ScoreStatistics  ss=null; 
   	JMenuBar bar;
   	JMenu fileMenu,scoreAnalyze,scoreStatistics;
   	JMenuItem welcome,save,modify,search,delete,exit,sort,aver,statistics;      
   	Container con=null;
   	Hashtable baseInformation=null;                    
   	File file=null;                             
   	CardLayout card=null;                       
   	JLabel label;
   	JPanel pCenter;
   	public StudentManager(){
     	setTitle("欢迎进入成绩分析系统");
     	welcome=new JMenuItem("进入欢迎界面");
     	save=new JMenuItem("录入成绩信息");
     	modify=new JMenuItem("修改成绩信息");
     	search=new JMenuItem("查询成绩信息");
     	delete=new JMenuItem("删除成绩信息");
     	exit=new JMenuItem("退出本系统");
     	exit.addActionListener(new ActionListener(){
     		public void actionPerformed(ActionEvent event){
               	System.exit(0);
            }
        });
        sort=new JMenuItem("各门课程排序");
        aver=new JMenuItem("各人平均成绩");
        statistics=new JMenuItem("各科成绩统计");
     	bar=new JMenuBar();
     	fileMenu=new JMenu("菜单选项");
     	fileMenu.add(welcome);
     	fileMenu.addSeparator();
     	fileMenu.add(save);
     	fileMenu.addSeparator();
     	fileMenu.add(modify);
     	fileMenu.addSeparator();
     	fileMenu.add(search);
     	fileMenu.addSeparator();
     	fileMenu.add(delete);
     	fileMenu.addSeparator();
     	fileMenu.addSeparator();
     	fileMenu.add(exit);
     	scoreAnalyze=new JMenu("成绩分析");
     	scoreAnalyze.add(sort);
     	scoreAnalyze.addSeparator();
     	scoreAnalyze.add(aver);
     	scoreStatistics=new JMenu("成绩统计");
     	scoreStatistics.add(statistics);
     	bar.add(fileMenu);
     	bar.add(scoreAnalyze);
     	bar.add(scoreStatistics);
     	this.setJMenuBar(bar);
     	label=new JLabel("欢迎进入成绩分析系统!",label.CENTER);
     	label.setFont(new Font("隶书",Font.BOLD,30));
     	label.setForeground(Color.blue);
     	baseInformation=new Hashtable();
     	welcome.addActionListener(this);
     	save.addActionListener(this);
     	modify.addActionListener(this);
     	search.addActionListener(this);
     	delete.addActionListener(this);
     	sort.addActionListener(this);
     	aver.addActionListener(this);
     	statistics.addActionListener(this);
     	card=new CardLayout();
     	con=getContentPane();
     	pCenter=new JPanel();
     	pCenter.setLayout(card); 
     	file=new File("input.dat");
     	if(!file.exists()){
     		try{
           		FileOutputStream out=new FileOutputStream(file);
           		ObjectOutputStream objectOut=new ObjectOutputStream(out);
           		objectOut.writeObject(baseInformation);
           		objectOut.close();
           		out.close();
          	}
       		catch(IOException e){
          	}
      	} 
     	baseInformationSave=new StudentSituation(file);
     	baseInformationModify=new ModifySituation(file);
     	baseInformationDelete=new Delete(file);
     	pCenter.add("欢迎界面",label);
     	pCenter.add("录入界面",baseInformationSave);
     	pCenter.add("修改界面",baseInformationModify);    
     	pCenter.add("删除界面",baseInformationDelete);
     	con.add(pCenter,BorderLayout.CENTER);
     	con.validate();//验证此容器及其所有子组件
     	addWindowListener(new WindowAdapter(){
     		public void windowClosing(WindowEvent e){
            	System.exit(0);
      	    }
        });
    	setVisible(true);
    	setBounds(100,50,420,380);
    	validate();
   	}
  	public void actionPerformed(ActionEvent e){
  		if(e.getSource()==welcome){
  			card.show(pCenter,"欢迎界面");
  		}
    	if(e.getSource()==save){
        	card.show(pCenter,"录入界面");
       	}
     	else if(e.getSource()==modify){
        	card.show(pCenter,"修改界面");
       	}
     	else if(e.getSource()==search){
     		baseInformationSearch=new Inquest(this,file);
         	baseInformationSearch.setVisible(true);
      	}
     	else if(e.getSource()==delete){
        	card.show(pCenter,"删除界面");
      	}
      	else if(e.getSource()==sort){
      		new ScoreSort(file);
      	}
      	else if(e.getSource()==aver){
      		new ScoreAverage(file);
      	}
      	else if(e.getSource()==statistics){
      		ss=new ScoreStatistics(this,file);
      		ss.setVisible(true);
      	}
   	}
   	public static void main(String args[]){
   		new StudentManager();
   	}
}