modifysituation.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 ModifySituation extends JPanel implements ActionListener{
	Hashtable baseInformation=null;                           
  	JTextField number,name,math,english,computer;                 
  	JButton preModify,saveModify,reset;
  	FileInputStream inOne=null;
  	ObjectInputStream inTwo=null;
  	FileOutputStream outOne=null;
  	ObjectOutputStream outTwo=null;
  	File file=null;                                           
  	public ModifySituation(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);
   		preModify=new JButton("开始修改");
   		saveModify=new JButton("录入修改");
   		saveModify.setEnabled(false);
   		reset=new JButton("重置");
   		number.addActionListener(this);
   		preModify.addActionListener(this);
   		saveModify.addActionListener(this);
   		reset.addActionListener(this);
   		Box box1=Box.createHorizontalBox();              
        box1.add(new JLabel("输入要修改信息的学号:",JLabel.CENTER));
   		box1.add(number);
   		box1.add(preModify);
   		Box box2=Box.createHorizontalBox();              
   		box2.add(new JLabel("(新)姓名:",JLabel.CENTER));
   		box2.add(name);
   		Box box3=Box.createHorizontalBox();              
   		box3.add(new JLabel("在下面是各门课程成绩(0-100的整数)",JLabel.CENTER));
   		Box box4=Box.createHorizontalBox();              
   		box4.add(new JLabel("(新)数学成绩:",JLabel.CENTER));
   		box4.add(math);
   		Box box5=Box.createHorizontalBox();              
   		box5.add(new JLabel("(新)英语成绩:",JLabel.CENTER));
   		box5.add(english);
   		Box box6=Box.createHorizontalBox();              
   		box6.add(new JLabel("(新)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(saveModify);
   		pSouth.add(reset);
   		add(pSouth,BorderLayout.SOUTH);
   		validate();
  	}
 	public void actionPerformed(ActionEvent e){
 		if(e.getSource()==preModify||e.getSource()==number){
 			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)){
                	saveModify.setEnabled(true);
                   	Student stu=(Student)baseInformation.get(stunumber);
                   	name.setText(stu.getName());
                   	math.setText(stu.getMath());
                   	english.setText(stu.getEnglish());
                   	computer.setText(stu.getComputer());
                } 
              	else{ 
                	saveModify.setEnabled(false);
                	String warning="该学号不存在!";
                  	JOptionPane.showMessageDialog(this,warning,"警告",JOptionPane.WARNING_MESSAGE);
                  	number.setText(null);
                  	name.setText(null);                                
                  	math.setText(null);
                  	english.setText(null);
                  	computer.setText(null);
                }
            }
        	else{ 
            	saveModify.setEnabled(false);
            	String warning="必须要输入学号!";
              	JOptionPane.showMessageDialog(this,warning,"警告",JOptionPane.WARNING_MESSAGE);
              	number.setText(null);
              	name.setText(null);                                
              	math.setText(null);
              	english.setText(null);
              	computer.setText(null);
           	}
      	} 
  		else if(e.getSource()==saveModify){ 
        	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 question="该生基本信息已存在,您想修改他(她)的基本信息吗?";
              		JOptionPane.showMessageDialog(this,question,"警告",JOptionPane.QUESTION_MESSAGE);
                   	String m="基本信息将被修改!";
                  	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 stu=new Student();
                     	stu.setNumber(stunumber);
                     	stu.setName(stuname);
                     	stu.setMath(stumath);
                     	stu.setEnglish(stuenglish);
                     	stu.setComputer(stucomputer);
                     	try{
                       		outOne=new FileOutputStream(file);
                       		outTwo=new ObjectOutputStream(outOne);
                       		baseInformation.put(stunumber,stu);
                       		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);
                      	}
                     	saveModify.setEnabled(false); 
                   	}
                 	else if(ok==JOptionPane.NO_OPTION){
                    	saveModify.setEnabled(true);
                   	}
               	}
             	else{
               		String warning="该学号没有基本信息,不能修改!";
                 	JOptionPane.showMessageDialog(this,warning,"警告",JOptionPane.WARNING_MESSAGE);
                 	saveModify.setEnabled(false); 
               	}
           	}
        	else{
            	String warning="必须要输入学号!";
              	JOptionPane.showMessageDialog(this,warning,"警告",JOptionPane.WARNING_MESSAGE);
              	saveModify.setEnabled(false);
           	}
       	}
   		if(e.getSource()==reset){ 
        	number.setText(null);
        	name.setText(null);
        	math.setText(null);
        	english.setText(null);
        	computer.setText(null);
      	}
  	}
}