studentsituation.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.*;
public class StudentSituation extends JPanel implements ActionListener{ 
    Hashtable baseInformation=null;                           
  	JTextField number,name,math,english,computer;
  	Student student=null;
  	JButton save,reset;
  	FileInputStream inOne=null;
  	ObjectInputStream inTwo=null;
  	FileOutputStream outOne=null;
  	ObjectOutputStream outTwo=null;
  	File file=null;                                           
  	public StudentSituation(File file){
  		this.file=file;
   		number=new JTextField(10);
   		name=new JTextField(10);
   		math=new JTextField(10);
   		english=new JTextField(10);
   		computer=new JTextField(10);
		save=new JButton("录入");
		reset=new JButton("重置");
		save.addActionListener(this);
		reset.addActionListener(this);
		Box box1=Box.createHorizontalBox();              
		box1.add(new JLabel("学号:",JLabel.CENTER));
		box1.add(number);
		Box box2=Box.createHorizontalBox();              
		box2.add(new JLabel("姓名:",JLabel.CENTER));
		box2.add(name);
		Box box3=Box.createHorizontalBox();              
		box3.add(new JLabel("在下面输入各门课程成绩(0-100的整数)",JLabel.CENTER));
		Box box4=Box.createHorizontalBox();              
		box4.add(new JLabel("数学成绩:",JLabel.CENTER));
		box4.add(math);
		Box box5=Box.createHorizontalBox();              
		box5.add(new JLabel("英语成绩:",JLabel.CENTER));
		box5.add(english);
		Box box6=Box.createHorizontalBox();              
		box6.add(new JLabel("电脑成绩:",JLabel.CENTER));
		box6.add(computer);
		Box boxH=Box.createVerticalBox();              
		boxH.add(box1);
		boxH.add(box2);
		boxH.add(box3);
		boxH.add(box4);
		boxH.add(box5);
		boxH.add(box6);
		boxH.add(Box.createVerticalGlue());          
		JPanel pCenter=new JPanel();
		pCenter.add(boxH);
		setLayout(new BorderLayout());
		add(pCenter,BorderLayout.CENTER);
		JPanel pSouth=new JPanel();
		pSouth.add(save);
		pSouth.add(reset);
		add(pSouth,BorderLayout.SOUTH);
		validate();
  	}
  	public void actionPerformed(ActionEvent e){
    	if(e.getSource()==save){
        	String stunumber="";
        	stunumber=number.getText();
        	if(stunumber.length()>0){
           		try{
                    inOne=new FileInputStream(file);
                    inTwo=new ObjectInputStream(inOne);
                    baseInformation=(Hashtable)inTwo.readObject();
                    inOne.close();
                    inTwo.close();
                }
                catch(Exception ee){
                }
                if(baseInformation.containsKey(stunumber)){
                	String warning="该生基本信息已存在,请到修改页面修改!";
                	JOptionPane.showMessageDialog(this,warning,"警告",JOptionPane.WARNING_MESSAGE);
                }
                else{
                	String m="基本信息将被录入!";
                    int ok=JOptionPane.showConfirmDialog(this,m,"确认",JOptionPane.YES_NO_OPTION,JOptionPane.INFORMATION_MESSAGE);
             		if(ok==JOptionPane.YES_OPTION){
                    	String stuname=name.getText();
                     	String stumath=math.getText();
                     	String stuenglish=english.getText();
                     	String stucomputer=computer.getText();
                     	student=new Student();
                     	student.setNumber(stunumber);
                     	student.setName(stuname);
                     	student.setMath(stumath);
                     	student.setEnglish(stuenglish);
                     	student.setComputer(stucomputer);
                       	try{
                           outOne=new FileOutputStream(file);
                           outTwo=new ObjectOutputStream(outOne);
                           baseInformation.put(stunumber,student);
                           outTwo.writeObject(baseInformation);
                           outTwo.close();
                           outOne.close();
                           number.setText(null);
                           name.setText(null);                                
                           math.setText(null);
                           english.setText(null);
                           computer.setText(null);
                        }
                        catch(Exception ee){ 
                        	System.out.println(ee);
                        }
                    }
                } 
            }
        	else{ 
            	String warning="必须要输入学号!";
              	JOptionPane.showMessageDialog(this,warning,"警告",JOptionPane.WARNING_MESSAGE);
            }
      	} 
    	if(e.getSource()==reset){ 
        	number.setText(null);
        	name.setText(null);
        	math.setText(null);
        	english.setText(null);
        	computer.setText(null);
        }
  	}
}