mystu.java

JAVA学生成绩管理系统课程设计作业

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


 class Savestu implements Serializable{    //保存数据
 
        Label nn=new Label("",Label.CENTER);
 		Label ii=new Label("");
 		Label yy=new Label("",Label.CENTER);
 		Label ss=new Label("",Label.CENTER);
 		Label ee=new Label("",Label.CENTER);
 		Label pp=new Label("",Label.CENTER);
 		Label zz=new Label("",Label.CENTER);
 
 	}
 	
 
 
 	
public class Mystu extends JFrame {
static int xn=0;
Panel p1=new Panel();
Panel p2=new Panel();
Button zj=new  Button("增加记录");
Button del=new  Button("删除记录");
Button sg=new  Button("修改记录");
Button find=new  Button("查询记录");
Button open=new Button("打开文件");
Button save=new Button("保存文件");
Savestu[] stu=new Savestu[10]; 
zjwindow zj1=new zjwindow();                               //必须放在外面，否则其它类找不到此符号                          
Dialog alarm=new Dialog(zj1,"警告!",true);                                   
myfile mf=new myfile(this);
                                      
   
   public Mystu(){
   	super("学生成绩管理系统---JIN");
p1.setLayout(new GridLayout(6,1,5,8));
p1.add(zj);
p1.add(del);
p1.add(sg);
p1.add(find);
p1.add(open);
p1.add(save);
 

p2.setLayout(new GridLayout(11,7,2,2));

Button name=new  Button("姓名");
Button id=new  Button("学号");
Button chinese=new  Button("语文");
Button math=new  Button("数学");
Button en=new  Button("英语");
Button avg=new  Button("平均分");
Button sum=new  Button("总分");
p2.add(id);
p2.add(name);
p2.add(chinese);
p2.add(math);
p2.add(en);
p2.add(avg);
p2.add(sum);


  for(int x=0;x<10;x++)
   stu[x]=new Savestu();
for(int x=0;x<10;x++)
{p2.add(stu[x].ii);
p2.add(stu[x].nn);
p2.add(stu[x].yy);
p2.add(stu[x].ss);
p2.add(stu[x].ee);
p2.add(stu[x].pp);
p2.add(stu[x].zz);
}	

	
add(p1,BorderLayout.WEST);
add(p2,BorderLayout.CENTER);


           //注册监听
zj.addActionListener(new ActionHandler()); 
   
sum.addActionListener(new sort());
chinese.addActionListener(new sort());
math.addActionListener(new sort());
en.addActionListener(new sort());
avg.addActionListener(new sort());

open.addActionListener(new filehander());
save.addActionListener(new filehander());

setDefaultCloseOperation(EXIT_ON_CLOSE);
}

public static void main (String[] args) {
Mystu jin=new Mystu();
jin.setBounds(200,100,700,500);
jin.setVisible(true);}



class zjwindow extends JFrame{    //增加数据窗口
     TextField zji=new TextField(10);
 	 TextField zjn=new TextField(10);
 	 TextField zjy=new TextField(10);
 	 TextField zjs=new TextField(10);
 	 TextField zje=new TextField(10);
 	 
 	 	
 	 	public zjwindow()
 	{super("增加学生数据");
 		Panel zjw=new Panel();
 	 
 	 
 	 Button zjsure=new Button("确定");
 	 Button zjcancel=new Button("取消");
 	 zjw.setLayout(new GridLayout(6,2));
 	 
 	 zjw.add(new Label("学号",Label.CENTER));
 	 zjw.add(zji);
 	  zjw.add(new Label("姓名",Label.CENTER));
 	  zjw.add(zjn);
 	   zjw.add(new Label("语文",Label.CENTER));
 	   zjw.add(zjy);
 	    zjw.add(new Label("数学",Label.CENTER));
 	    zjw.add(zjs);
 	     zjw.add(new Label("英语",Label.CENTER));
 	     zjw.add(zje);
 	     zjw.add(zjsure);
 	     zjw.add(zjcancel);
 	     add(zjw);
 	     pack();
 	     
 	     zjsure.addActionListener(new zjAction());
 	     zjcancel.addActionListener(new zjAction());
 	     
 	     }
 	     
 
 
 class zjAction implements ActionListener{     //监听
		public void actionPerformed(ActionEvent e){
		
			if(e.getActionCommand()=="确定")
		{
			if((zji.getText().equals(""))||(zjn.getText().equals(""))||(zjy.getText().equals(""))||(zjs.getText().equals(""))||(zje.getText().equals("")))
			{	Button alasure=new Button("确定继续");
					alasure.addActionListener(new alahander());
					alarm.add(new Label("请输入完整数据，再继续。。。"),BorderLayout.CENTER);
					alarm.add(alasure,BorderLayout.SOUTH);
					alarm.setBounds(330,200,200,150);
					alarm.setVisible(true);
					}
				else{
					float temp; 
			stu[xn].ii.setText(zji.getText());
			stu[xn].nn.setText(zjn.getText());
			stu[xn].yy.setText(zjy.getText());
			stu[xn].ss.setText(zjs.getText());
			stu[xn].ee.setText(zje.getText());
				temp=Float.parseFloat(zjy.getText())+Float.parseFloat(zjs.getText())+Float.parseFloat(zje.getText());
				stu[xn].zz.setText(""+temp+"");
				stu[xn].pp.setText(""+temp/3+"");
				xn++;
				zji.setText("");
				zjn.setText("");
				zjy.setText("");
				zjs.setText("");
	           	zje.setText("");
				zj1.setVisible(false);
					
				
				}	}
			 if(e.getActionCommand()=="取消")
			{	zji.setText("");
				zjn.setText("");
				zjy.setText("");
				zjs.setText("");
	           	zje.setText("");
	           	zj1.setVisible(false);
	           	}
			}
			}
 
 	 
 	 		

}	


class myfile{
     FileDialog fdlg;
	 public myfile(JFrame parent){
	 fdlg=new FileDialog(parent,"",FileDialog.LOAD);
	 }
	
	String getpath(){
		return fdlg.getDirectory()+"\\"+fdlg.getFile();
		}
		
	void save()throws IOException{
		fdlg.setTitle("保存学生信息");
		fdlg.setMode(FileDialog.SAVE);
		fdlg.setVisible(true);
		
		FileOutputStream fsave=new FileOutputStream(getpath());
	    ObjectOutputStream fse=new ObjectOutputStream(fsave);
		
		fse.writeObject(stu);
			
		System.out.print("jin");
		fse.close();
	}
			
	void open()throws ClassNotFoundException,IOException{
		fdlg.setTitle("打开学生信息");
		fdlg.setMode(FileDialog.LOAD);
		fdlg.setVisible(true);
		
		FileInputStream fopen=new FileInputStream(getpath());
		ObjectInputStream fon=new ObjectInputStream(fopen);
	    
	    Savestu[] rsstu=(Savestu[])fon.readObject();
		
		
			
			fon.close();
			//stu[1].ii.setText(stu[0].ii.getText());
			//stu[3].ii.setText("3545");
			for(int k=0;k<rsstu.length;k++){
			
			stu[k].ii.setText(rsstu[k].ii.getText());
			stu[k].nn.setText(rsstu[k].nn.getText());
			stu[k].yy.setText(rsstu[k].yy.getText());
			stu[k].ss.setText(rsstu[k].ss.getText());
			stu[k].ee.setText(rsstu[k].ee.getText());
			stu[k].pp.setText(rsstu[k].pp.getText());
			stu[k].zz.setText(rsstu[k].zz.getText());
			}
			System.out.print("lai");
			
		}
	
	}



class alahander implements ActionListener{
	public void actionPerformed(ActionEvent e){
		alarm.setVisible(false);}
	}

	
class ActionHandler implements ActionListener{     //监听增加等功能实现   
		public void actionPerformed(ActionEvent e){
			if(e.getActionCommand()=="增加记录")
			{
			zj1.setBounds(460,200,250,250);
			zj1.setVisible(true);
		
				}	}
			}
			
class sort implements ActionListener{        //很笨拙的方法，主要是刚开始结构就不好。
	public void actionPerformed(ActionEvent e){
		Savestu temp=new Savestu();
		int power=0;
	for(int j=0;j<xn;j++)
	{	for(int k=j+1;k<xn;k++)
			{  
		 if(e.getActionCommand()=="平均分"||e.getActionCommand()=="总分")
			{if(Float.parseFloat(stu[j].pp.getText())<Float.parseFloat(stu[k].pp.getText()))
			    power=1; 
			
			}else if(e.getActionCommand()=="语文")
			{if(Float.parseFloat(stu[j].yy.getText())<Float.parseFloat(stu[k].yy.getText()))
			power=1;}
			else if(e.getActionCommand()=="数学")
				{if(Float.parseFloat(stu[j].ss.getText())<Float.parseFloat(stu[k].ss.getText()))
			power=1;}
				else 	
				{if(Float.parseFloat(stu[j].ee.getText())<Float.parseFloat(stu[k].ee.getText()))
			power=1;}
				
			if(power==1)
			{	temp.ii.setText(stu[k].ii.getText());
				temp.nn.setText(stu[k].nn.getText());
				temp.yy.setText(stu[k].yy.getText());
				temp.ss.setText(stu[k].ss.getText());
				temp.ee.setText(stu[k].ee.getText());
				temp.pp.setText(stu[k].pp.getText());
				temp.zz.setText(stu[k].zz.getText());
				
			stu[k].ii.setText(stu[j].ii.getText());
			stu[k].nn.setText(stu[j].nn.getText());
			stu[k].yy.setText(stu[j].yy.getText());
			stu[k].ss.setText(stu[j].ss.getText());
			stu[k].ee.setText(stu[j].ee.getText());
			stu[k].pp.setText(stu[j].pp.getText());
			stu[k].zz.setText(stu[j].zz.getText());
			
			stu[j].ii.setText(temp.ii.getText());
			stu[j].nn.setText(temp.nn.getText());
			stu[j].yy.setText(temp.yy.getText());
			stu[j].ss.setText(temp.ss.getText());
			stu[j].ee.setText(temp.ee.getText());
			stu[j].pp.setText(temp.pp.getText());
			stu[j].zz.setText(temp.zz.getText());
			
			power=0;
			}
			}
		
			
		
				}
		
		}
	}
		
class filehander implements ActionListener{
		public void actionPerformed(ActionEvent e){
			if(e.getActionCommand()=="打开文件")
			{try{	mf.open();
			}catch(IOException ie) {System.out.print("打开出错");}
			catch(ClassNotFoundException ie) {System.out.print("打开出错");}
			}else{
			try{mf.save();
			
			}catch(IOException ie) {System.out.print("保存出错");}
			}
					
			
			}
	}		
 }