test.java

简单的JAVA学生管理系统

import java.awt.*;
import java.io.*;
import java.awt.event.*;
import java.util.*;
//////////////学生类///////////////////////
class student
{
	public String number;
	public String name;
	public int mathscore;
	public int englishscore;
	public int javascore;
	public student()
	{
		number="";
		name="无名氏";
		mathscore=0;
		englishscore=0;
		javascore=0;
	}
	public student(String number1,String name1,int mathscore1,int englishscore1,int javascore1)
	{
		this.number=number1;
		this.name=name1;
		this.mathscore=mathscore1;
		this.englishscore=englishscore1;
		this.javascore=javascore1;
	}
}
///////////////////用户类///////////////////////
class user
{
	public String name;
	public String secret;
	public String email;
	public String telephone;
	public user()
	{
		name="无名氏";
		secret=null;
		email=" ";
		telephone=null;
	}
	public user(String name1,String secret1,String email1,String telephone1)
	{
		this.name=name1;
		this.secret=secret1;
		this.email=email1;
		this.telephone=telephone1;
	}
}

/////////////////成绩系统类////////////////////
class Source_System extends Panel implements ActionListener
{
	Button b1,b2,b3,b4;
	static int n=0;
	public static int geshu()
    {	try
       {
	     FileReader file=new FileReader("x.dat");
	     LineNumberReader in=new LineNumberReader(file);
	     while(in.readLine()!=null)
	     {
	       n=in.getLineNumber()/5;
	     } 
	   }catch(IOException a){	};
	   return n;
	}
	Label L1,L2,L3,L4,L5;
	TextField T1,T2,T3,T4,T5;
	TextArea T6;
	Panel draw;
	public Source_System(Panel draw)
	{
		this.draw=draw;
		L1=new Label("学号");
		L2=new Label("姓名");
		L3=new Label("数学");
		L4=new Label("外语");
		L5=new Label("java");
		T1=new TextField(20); 
		T2=new TextField(20);
		T3=new TextField(20);
		T4=new TextField(20);
		T5=new TextField(20);
		T6=new TextArea(4,30);
		b1=new Button("录入");
		b2=new Button("计算每位学生的平均成绩");
		b3=new Button("计算数学平均分");
		b4=new Button("学生人数");
		add(L1);add(T1);
		add(L2);add(T2);
		add(L3);add(T3);
		add(L4);add(T4);
		add(L5);add(T5);
		add(b1);add(b2);
		add(b3);add(b4);add(T6);
		b1.addActionListener(this);
		b2.addActionListener(this);
		b3.addActionListener(this);
		b4.addActionListener(this);
	}
	public void actionPerformed(ActionEvent e)
	{
		String label=e.getActionCommand();
		if(label.equals("录入"))
		{
			
			try
			{
				BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
			  RandomAccessFile out=new RandomAccessFile("x.dat","rw");
			  if(T1.getText().length()==0||T2.getText().length()==0||T3.getText().length()==0||T4.getText().length()==0||T5.getText().length()==0)
			   {
					T6.setText("输入有错,请重新输入!");
			   }
			  else
			   {
			   	student	s1=new student(T1.getText(),T2.getText(),Integer.parseInt(T3.getText()),Integer.parseInt(T4.getText()),Integer.parseInt(T5.getText()));
			   	 out.seek(out.length());
				    out.writeBytes(s1.number+"\n");
				    out.writeBytes(s1.name+"\n");
				    out.writeBytes(s1.mathscore+"\n");
				    out.writeBytes(s1.englishscore+"\n");
				    out.writeBytes(s1.javascore+"\n");
				    T6.setText("录入成功!");	
			   }	
			 }catch (IOException a){	};
		}
		else if(label.equals("计算每位学生的平均成绩"))
		{
			int pingjun=0;
			String no;
			String na;
			int maths;
			int englishs;
			int javas;
			try
			{
			
			FileReader file=new FileReader("x.dat");
			LineNumberReader in=new LineNumberReader(file);
			/*while(in.readLine()!=null)
			{
				n=in.getLineNumber()/5;
			}*/
			boolean eof=false;
			while(!eof)
			{
				T6.setText("计算每位学生的平均成绩为:"+"\n学号:");
				for(int i=0;i<10;i++)
				{
					no=in.readLine();
				   if(no==null)
				    {
					   eof=true;
				    }
				   else
				     {	
				       na=in.readLine();
				       maths=Integer.parseInt(in.readLine());
				       englishs=Integer.parseInt(in.readLine());
				       javas=Integer.parseInt(in.readLine());
			     	   pingjun=(maths+englishs+javas)/3;
				      T6.append(no+"\n姓名:"+na+"\n平均分:"+pingjun+"\n");
				     }
			   }
			 }
			}catch(IOException a){   };
		}
		else if(label.equals("计算数学平均分"))
		{
			int mathsjun=0;//数学平均分
			int count=0;
			String no;
			String na;
			int maths;
			int englishs;
			int javas;
			try
			{
			  FileReader file=new FileReader("x.dat");
			  LineNumberReader in=new LineNumberReader(file);
			  boolean eof=false;
			  while(!eof)
			  {
				for(int i=0;i<10;i++)
				{
					count++;
					no=in.readLine();
				   if(no==null)
				    {
					   eof=true;
				    }
				   else
				     {	
				       na=in.readLine();
				       maths=Integer.parseInt(in.readLine());
				       englishs=Integer.parseInt(in.readLine());
				       javas=Integer.parseInt(in.readLine());
			     	   mathsjun+=maths;
				      T6.append("数学平均成绩为:"+mathsjun);
				     } 
			   }
			  }
			}catch(IOException a){   };
			T6.setText("数学平均成绩为:"+mathsjun/geshu());
		}
		else if(label.equals("学生人数"))
		{
			T6.setText("学生总人数为:"+geshu());
		}
	}
}

/////////////主类/////////////////////
public class test extends Frame
{
     TextArea t1=new TextArea("恭喜你！注册成功！",5,5);
     boolean ok=false;
     Label username=new Label("用户名 ");
     Label secreat=new Label("密码 ");
     Label email=new Label("E-mail地址 ");
     Label telephone=new Label("联系电话 ");
     
     Label secreatqueit=new Label("密码不能少于6位");
     //Button b2=new Button("密码检测");
     Label emailqueit=new Label("E-mail地址要求包括@符号");
     //Button b3=new Button("邮箱检测");
     Label telephonequeit=new Label("联系电话不能有非数字");
    // Button b4=new Button("联系电话检测");
     TextField usernamefield=new TextField();
     TextField secreatfield=new TextField();
     TextField emailfield=new TextField();
     TextField telephonefield=new TextField();
     Button b1=new Button("注册");
     Button b2=new Button("确定");
     Button b3=new Button("登录");
     Dialog my;
     //Dialog Enter;//登录后的对话框
     Label Gongxi=new Label("恭喜你！注册成功！");
     boolean count1=false;//记录密码验证正确与否
     boolean count2=false;//记录邮箱验证正确与否
     boolean count3=false;//记录联系方式验证正确与否

   /****对所要添加的组件进行设置****/
     public  void set()
     {
     setLayout(new GridBagLayout());
     GridBagConstraints gridBag=new GridBagConstraints();
     gridBag.fill=GridBagConstraints.HORIZONTAL;
     gridBag.weightx=0;
     gridBag.weighty=0;
     username.setFont(new Font("Alias",Font.BOLD,16));
     this.add(username,gridBag,0,0,1,1);
     secreat.setFont(new Font("Alias",Font.BOLD,16));
     this.add(secreat,gridBag,0,1,1,1);
     email.setFont(new Font("Alias",Font.BOLD,16));
     this.add(email,gridBag,0,2,1,1);
     telephone.setFont(new Font("Alias",Font.BOLD,16));
     this.add(telephone,gridBag,0,3,1,1);
     telephone.setFont(new Font("Alias",Font.BOLD,16));
     this.add(secreatqueit,gridBag,3,1,1,1);
     telephone.setFont(new Font("Alias",Font.BOLD,16));
     this.add(emailqueit,gridBag,3,2,1,1);
     telephone.setFont(new Font("Alias",Font.BOLD,16));
     this.add(telephonequeit,gridBag,3,3,1,1);
     gridBag.weightx=100;
     gridBag.weighty=0;
     this.add(usernamefield,gridBag,1,0,2,1);
     this.add(secreatfield,gridBag,1,1,2,1);
     this.add(emailfield,gridBag,1,2,2,1);
     this.add(telephonefield,gridBag,1,3,2,1);
     //gridBag.fill=GridBagConstraints.BOTH;
     gridBag.weightx=100;
     gridBag.weighty=100;
     this.add(b1,gridBag,1,5,1,1);
     this.add(b3,gridBag,2,5,1,1);
     //this.add(b2,gridBag,0,4,1,1);
     //this.add(b3,gridBag,1,4,1,1);
     //this.add(b4,gridBag,2,4,1,1);
     
     setSize(500,500);
     setVisible(true);
     secreatfield.setEchoChar('*');
     
     /*********对密码的合法与否进行检测********/
     b1.addActionListener(new java.awt.event.ActionListener()
     {
     	public void actionPerformed(ActionEvent e)
     	{
     		String s;
     		
     		s=secreatfield.getText();
     		if(s.length()>=6)
     		{
              count1=true;
     		  secreatqueit.setText("密码合法！"); 
       		}
     		else
     		  {
     		  	count1=false;
     		    secreatfield.setText("");
     		    secreatqueit.setText("密码少于六位，请重新输入！");
     		  }
     	}
     });
     
    
     /********对邮箱格式的检测********/
     b1.addActionListener(new java.awt.event.ActionListener()
     {
     	public void actionPerformed(ActionEvent e)
     	{
     		String s;
     		s=emailfield.getText();
     		int n=s.length();
     		char a[]=new char[n];
     		for(int i=0;i<n;i++)
     			a[i]=s.charAt(i);
     	    for(int i=0;i<n;i++)
     	    {
     	    	if(a[i]=='@')
     	    	{
     				emailqueit.setText("邮箱地址合法");
     				count2=true;
     				break;
     			}
     			else
     			{
     		        count2=false;
     		        emailqueit.setText("邮箱地址不合法，请重新输入！");
     		     }
     	    }
     	}
     });
     
     /****************对联系电话的检测****************/
     b1.addActionListener(new java.awt.event.ActionListener()
     {
     	public void actionPerformed(ActionEvent e)
     	{
     		String s;
     		s=telephonefield.getText();
     		int n=s.length();
     		char a[]=new char[n];
     		for(int i=0;i<n;i++)
     			a[i]=s.charAt(i);
     	    for(int i=0;i<n;i++)
     	    {
     	    	if(!Character.isDigit(a[i]))
     	    	{
     				telephonefield.setText("");
     		        telephonequeit.setText("联系方式不合法，请重新输入！"); 
     		        count3=false;
     				break;
     			}
     		    else 
     		    {
     		    	count3=true;
     		    	telephonequeit.setText("联系方式合法");
     		     }
     	    }
     	}
     });
     
     /***********编写弹出式对话框11***********/

     	b1.addActionListener(new java.awt.event.ActionListener()
     	{
     	
     	public void actionPerformed(ActionEvent e)
     	{
     		if(count1&&count2&&count3)
     		{
     	    
     		my=new Dialog(test.this,"恭喜对话框",true);
     		my.setLayout(new BorderLayout());
     		my.add("South",b2);
     		my.add("North",t1);
     		my.add("West",Gongxi);
     		my.setSize(200,200);
     		my.setVisible(true);
            ok=true;
     		}
     	}
       });  
       		b2.addActionListener(new java.awt.event.ActionListener()
     		{
     	
     		public void actionPerformed(ActionEvent e)
     		{
     			//***********编写对用户信息进行存储**************/
     		try
			{
				BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
			  RandomAccessFile out=new RandomAccessFile("y.dat","rw");
			  if(!ok)
			   {
					user u1=new user(usernamefield.getText(),secreatfield.getText(),emailfield.getText(),telephonefield.getText());
			   	    out.seek(out.length());
				    out.writeBytes(u1.name+"\n");
				    out.writeBytes(u1.secret+"\n");
				    out.writeBytes(u1.email+"\n");
				    out.writeBytes(u1.telephone+"\n");
			   }
			  else
			   {
			   		t1.setText("输入有错,请重新输入!");
			   }
			   	
			 }catch (IOException a){	};
     			//////清空文本框///////
     			usernamefield.setText("");
     			secreatfield.setText("");
     			emailfield.setText("");
     			telephonefield.setText("");
     			my.dispose();
     		}
     		});
     		
     		
     	/***************编写登录后的对话框**************/	
     	b3.addActionListener(new java.awt.event.ActionListener()
     	{
     		String uname[]=new String[10];
     		String usecreat[]=new String[10];
     		String uemail[]=new String[10];
     		String utelephone[]=new String[10];
     	    boolean ok=false;
     		public void actionPerformed(ActionEvent e)
     		{
     			/*******比较文本框中的用户是否已注册,是的话把ok置为true*****/
     		int h=0;//用户存在的标志位;	
			String una;
			String usecreat;
			String uemail;
			String utelephone;
			try
			{
			
			FileReader file=new FileReader("y.dat");
			LineNumberReader in=new LineNumberReader(file);
			boolean eof=false;
			while(!eof)
			{
				for(int i=0;i<10;i++)
				{
					una=in.readLine();
				   if(una==null)
				    {
					   eof=true;
					   my=new Dialog(test.this,"无用户纪录",true);
     		           my.setLayout(new BorderLayout());
     	               my.add("South",b2);
     		           my.add("North",t1);
                       t1.setText("对不起,该用户不存在!");
     		           my.setSize(200,200);
     		           my.setVisible(true);
				    }
				   else
				     {	
				      // una=in.readLine();
				       usecreat=in.readLine();
				       uemail=in.readLine();
				       utelephone=in.readLine();
			           if((usernamefield.getText().startsWith(una))&&(secreatfield.getText().startsWith(usecreat)))
			           {
			           	eof=true;
			           	ok=true;
			           	break;
			           }
			           else
			           {
			           		my=new Dialog(test.this,"错误",true);
     		                my.setLayout(new BorderLayout());
     	                 	my.add("South",b2);
     		                my.add("North",t1);
                            t1.setText("对不起,该用户不存在!");
     		                my.setSize(200,200);
     		                my.setVisible(true);
			           	    eof=true;
			           	    i=11;
			           }
			             
				     }
			   }
			 }
			}catch(IOException a){   };
     			if(ok)
     			{
     				Frame f=new Frame("学生成绩系统");
		            Panel draw=new Panel();
	            	Source_System two=new Source_System(draw);
	                f.add(two);
	                f.setSize(250,350);
	                f.setVisible(true);
     			}
     		}
     	});
    } 

	private void add(Component c, GridBagConstraints gbc, int x, int y, int w, int h)
	{
		gbc.gridx =x;
		gbc.gridy =y;
		gbc.gridheight = h;
		gbc.gridwidth = w;
		add(c, gbc);
	}
	 public static void main(String args[])
     {
       test t1=new test();
       t1.set();
     }
}