Java IO的简易学生管理系统

比上一个基于Mysql数据库的完善了一些细节

WindowIO是窗口界面

package JavaStuIO;

import java.sql.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.*;

//class student
class student implements java.io.Serializable{
	
	String number;
	String name;
	String sex;
	String birthday;
	String department;
	
	public student(String number,String name,String sex,String birthday,String department){
		this.number = number;
		this.name = name;
		this.sex = sex;
		this.birthday = birthday;
		this.department = department;
		
		
	}
	
}







public class WindowIO extends JFrame {
	//private static final long serialVersionUID = -1928970409928880648L;
	public static void main(String[] args){
		
	/////////////////////////////////////////////////////////////////////////////	
		
	TreeMap<String,student> tm = new TreeMap<String,student>();   //treemap
//	
	File file =new File("E:\java用文件","file.txt");
	
	if(!file.exists())
	{
		FileOutputStream fout = null;
		ObjectOutputStream oos = null;
		try{
			fout = new FileOutputStream(file);  
			oos = new ObjectOutputStream(fout);     
			
			oos.writeObject(tm);                     
			
			fout.close();
			oos.close(); 
			
			System.out.println("write ok!!!");
			
		
		}catch (Exception er){
			er.printStackTrace();
			System.out.println("writeobject go die");
		}
		
		
		
	}
	
	/////////////////////////////////////////////////////////////////////////
	
		
	JFrame jframe = new JFrame("学生管理系统") ;
	
	   JLabel title = new JLabel("这是一个学生管理系统",JLabel.CENTER);
	   Font font = new Font("",Font.BOLD+Font.PLAIN,15);
	   
	   title.setFont(font);
	   
	   ImageIcon icon = new ImageIcon("E:\java用图片\look.jpg");
	   
	   icon.setImage(icon.getImage().getScaledInstance(150, 150, Image.SCALE_DEFAULT));
	   
	   JLabel pic = new JLabel(icon);
	   //pic.setSize(10, 10);
	   //pic.setSize(50,100);?????
	   //pic.drawImage(???,100, 100, 50, 50,null);
	   
	   jframe.setSize(450,300);
	   jframe.setLocation(250,350);
	   jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	   jframe.setVisible(true);
	
	
	   JButton button1 = new JButton("添加");
	   JButton button2 = new JButton("修改");
	   JButton button3 = new JButton("查询");
	   JButton button4 = new JButton("删除");
	   JButton button5 = new JButton("浏览");
	   
	   FlowLayout flow = new FlowLayout(FlowLayout.LEFT,10,10);
	   JPanel panel = new JPanel(flow);
	   panel.add(button1);
	   panel.add(button2);
	   panel.add(button3);
	   panel.add(button4);
	   panel.add(button5);
	   panel.add(title);
	   panel.add(pic);
	   
	   jframe.add(panel);
	   
	   
	   try{
		   file.createNewFile();
		   System.out.println("creat ok!");
	   }
	   catch (IOException e){
		   System.out.println("creat go die!");
		   e.printStackTrace();
	   }
	   
	   button1.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				Add add = new Add(); 

			}			
		});
	   
	   button2.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				Change change = new Change();			
			}			
		});
	   
	   button3.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				Ask ask = new Ask();			
			}			
		});
	   
	   button4.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				Delete delete = new Delete();			
			}			
		});
	   
	   button5.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				Look look = new Look();			
			}			
		});
	   
	   
	   
	}
}

　　

Add是添加功能

package JavaStuIO;

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.TreeMap;
import java.io.*;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

import JavaStuIO.WindowIO;

public class Add extends JFrame{
     
	JLabel jlnumber = new JLabel("学号：");
	JLabel jlname = new JLabel("姓名：");
	JLabel jlsex = new JLabel("性别：");
	JLabel jlbirthday = new JLabel("出生日期：");
	JLabel jldepartment = new JLabel("学院：");
	
	JTextField jtnumber = new JTextField("",20);
	JTextField jtname = new JTextField("",20);
	JTextField jtsex = new JTextField("",20);
	JTextField jtbirthday = new JTextField("",20);
	JTextField jtdepartment = new JTextField("",20);
	
	JButton buttonadd = new JButton("添加");
	JButton buttonreturn = new JButton("返回");
	
	
	public Add() {
		
		//TreeMap<String,student> tm = new TreeMap<String,student>();
		
		JPanel jpnumber = new JPanel();
		JPanel jpname = new JPanel();
		JPanel jpsex = new JPanel();
		JPanel jpbirthday = new JPanel();
		JPanel jpdepartment = new JPanel();
		JPanel jpforbutton = new JPanel(new GridLayout(1,1));
		
		jpnumber.add(jlnumber);
		jpnumber.add(jtnumber);
		
		jpname.add(jlname);
		jpname.add(jtname);
		
		jpsex.add(jlsex);
		jpsex.add(jtsex);
		
		jpbirthday.add(jlbirthday);
		jpbirthday.add(jtbirthday);
		
		jpdepartment.add(jldepartment);
		jpdepartment.add(jtdepartment);
		
		jpforbutton.add(buttonadd);
		jpforbutton.add(buttonreturn);
		
		buttonadd.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				
				//Add
//				File file =new File("E:\java用文件","file.txt");
//				
//				String name = jtname.getText() + " ";
//				String number = jtnumber.getText() + " ";
//				String sex = jtsex.getText() + " ";
//				String birthday = jtbirthday.getText() + " ";
//				String department = jtdepartment.getText()+"
";
//				
//				student stu = new student(number,name,sex,birthday,department);
//				
//				Writer out = null;
//			    try{
//			    	out = new FileWriter(file,true);
//			    	out.write(stu.number);
//			    	out.write(stu.name);
//			    	out.write(stu.sex);
//			    	out.write(stu.birthday);
//			    	out.write(stu.department);
//			    	
//			    	
//			    	out.close();
//			    	System.out.println("write ok!");
//			    }catch (IOException ee){
//			    	System.out.println("write go die!");
//			    	ee.printStackTrace();
//			    	
//			    }
				
				File file =new File("E:\java用文件","file.txt");
				
				
				FileInputStream fin = null;
				ObjectInputStream ois = null;
				
		        try{
		        	fin = new FileInputStream(file);  //
					ois = new ObjectInputStream(fin);      //
		        	
					TreeMap<String,student> tm = (TreeMap)ois.readObject();      //???
					
					fin.close();
					ois.close();
					//insert
					String name = jtname.getText();
					String number = jtnumber.getText();
					String sex = jtsex.getText();
					String birthday = jtbirthday.getText();
					String department = jtdepartment.getText();
					
					student stu = new student(number,name,sex,birthday,department);
					
					
					
					FileOutputStream fout = null;
					ObjectOutputStream oos = null;
					try{
						fout = new FileOutputStream(file);  //
						oos = new ObjectOutputStream(fout);      //
						
						tm.put(stu.number,stu);
						
						oos.writeObject(tm);                     
						
						fout.close();
						oos.close(); 
						
						System.out.println("write ok!!!");
						JOptionPane.showMessageDialog(null,"世界线已经发生了变动 el psy congroo！");
					
					}catch (Exception er){
						er.printStackTrace();
						System.out.println("writeobject go die");
					}
					
					
					//
		        }catch(Exception et){
		        	System.out.println("go die!");
		        	et.printStackTrace();
		        }
				
		        jtnumber.setText(null);
				jtname.setText(null);
				jtsex.setText(null);
				jtbirthday.setText(null);
				jtdepartment.setText(null);
		        
  			    //TreeMap<String,student> tm = new TreeMap<String,student>();
				
				
//				String name = jtname.getText();
//				String number = jtnumber.getText();
//				String sex = jtsex.getText();
//				String birthday = jtbirthday.getText();
//				String department = jtdepartment.getText();
//				
//				student stu = new student(number,name,sex,birthday,department);
//				
//				
//				
//				FileOutputStream fout = null;
//				ObjectOutputStream oos = null;
//				try{
//					fout = new FileOutputStream(file);  //
//					oos = new ObjectOutputStream(fout);      //
//					
//					tm.put(stu.number,stu);
//					
//					oos.writeObject(tm);                     
//					
//					fout.close();
//					oos.close(); 
//					
//					System.out.println("write ok!!!");
//					
//				
//				}catch (Exception er){
//					er.printStackTrace();
//					System.out.println("writeobject go die");
//				}
//				
//				jtnumber.setText(null);
//				jtname.setText(null);
//				jtsex.setText(null);
//				jtbirthday.setText(null);
//				jtdepartment.setText(null);
				//add end
			    //
			    //
			    
			    
		}}	
		
				);
		
		buttonreturn.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
						
			}			
		});
		
		
		this.setTitle("添加学生信息");
		this.setLayout(new GridLayout(9,1));
		this.add(jpnumber);
		this.add(jpname);
		this.add(jpsex);
		this.add(jpbirthday);
		this.add(jpdepartment);
		this.add(jpforbutton);
		this.setLocation(400,300);
		this.setSize(350,300);
		this.setVisible(true);
		
	}
}

　　

Ask是查询

package JavaStuIO;

import java.sql.*;
import java.util.TreeMap;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

import JavaStuIO.WindowIO;

public class Ask extends JFrame {
	private static final long serialVersionUID = -1928970409928880648L;
	
	JLabel jlnumber = new JLabel("学号：");
	JLabel jlname = new JLabel("姓名：");
	JLabel jlsex = new JLabel("性别：");
	JLabel jlbirthday = new JLabel("出生日期：");
	JLabel jldepartment = new JLabel("学院：");
	
	JTextField jtnumber = new JTextField("",20);
	JLabel jname = new JLabel();
	JLabel jsex = new JLabel();
	JLabel jbirthday = new JLabel();
	JLabel jdepartment = new JLabel();
	
	JButton buttonask = new JButton("查询");
	JButton buttonreturn = new JButton("返回");
	
	
	public Ask() {
		JPanel jpnumber = new JPanel();
		JPanel jpname = new JPanel();
		JPanel jpsex = new JPanel();
		JPanel jpbirthday = new JPanel();
		JPanel jpdepartment = new JPanel();
		JPanel jpforbutton = new JPanel(new GridLayout(1,1));
		
		jpnumber.add(jlnumber);
		jpnumber.add(jtnumber);
		
		jpname.add(jlname);
		jpname.add(jname);
		
		jpsex.add(jlsex);
		jpsex.add(jsex);
		
		jpbirthday.add(jlbirthday);
		jpbirthday.add(jbirthday);
		
		jpdepartment.add(jldepartment);
		jpdepartment.add(jdepartment);
		
		jpforbutton.add(buttonask);
		jpforbutton.add(buttonreturn);
		
		buttonask.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
			  //ask
				String number = jtnumber.getText();
				
				
				File file =new File("E:\java用文件","file.txt");
				//TreeMap<String,student> tm = new TreeMap<String,student>();
				
				FileInputStream fin = null;
				ObjectInputStream ois = null;
				
		        try{
		        	fin = new FileInputStream(file);  //
					ois = new ObjectInputStream(fin);      //
		        	
					TreeMap<String,student> tm = (TreeMap)ois.readObject();      //???
					
					student stu = (student)tm.get(number);
					
					
					if(tm.containsKey(number))
			        {
			            jname.setText(stu.name);
			            jsex.setText(stu.sex);
			            jbirthday.setText(stu.birthday);
			            jdepartment.setText(stu.department);
			        	
			        }
			        else
			        {
			        	System.out.println("number is not exist!");
			        	JOptionPane.showMessageDialog(null,"学号:excuse me?",
			                      "warning",JOptionPane.WARNING_MESSAGE);
			        }
					
					fin.close();
					ois.close();
		        }catch(Exception et){
		        	System.out.println("go die!");
		        	et.printStackTrace();
		        }
		      
		        
			 //end  ask
			
			}}
			
				);
		
		buttonreturn.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				//Window window = new Window();			
			}			
		});
		
		
		this.setTitle("查询学生信息");
		this.setLayout(new GridLayout(9,1));
		this.add(jpnumber);
		this.add(jpname);
		this.add(jpsex);
		this.add(jpbirthday);
		this.add(jpdepartment);
		this.add(jpforbutton);
		this.setLocation(400,300);
		this.setSize(350,300);
		this.setVisible(true);
		
		
	}
	
	
}

　　

Change是修改

package JavaStuIO;

import java.sql.*;
import java.util.TreeMap;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

import JavaStuIO.WindowIO;

public class Change extends JFrame {
	private static final long serialVersionUID = -1928970409928880648L;
	
	JLabel jlnumber = new JLabel("学号：");
	JLabel jlname = new JLabel("姓名：");
	JLabel jlsex = new JLabel("性别：");
	JLabel jlbirthday = new JLabel("出生日期：");
	JLabel jldepartment = new JLabel("学院：");
	
	JTextField jtnumber = new JTextField("",20);
	JTextField jtname = new JTextField("",20);
	JTextField jtsex = new JTextField("",20);
	JTextField jtbirthday = new JTextField("",20);
	JTextField jtdepartment = new JTextField("",20);
	
	JButton buttonchange = new JButton("修改");
	JButton buttonreturn = new JButton("返回");
	
	
	public Change() {
		JPanel jpnumber = new JPanel();
		JPanel jpname = new JPanel();
		JPanel jpsex = new JPanel();
		JPanel jpbirthday = new JPanel();
		JPanel jpdepartment = new JPanel();
		JPanel jpforbutton = new JPanel(new GridLayout(1,1));
		
		jpnumber.add(jlnumber);
		jpnumber.add(jtnumber);
		
		jpname.add(jlname);
		jpname.add(jtname);
		
		jpsex.add(jlsex);
		jpsex.add(jtsex);
		
		jpbirthday.add(jlbirthday);
		jpbirthday.add(jtbirthday);
		
		jpdepartment.add(jldepartment);
		jpdepartment.add(jtdepartment);
		
		jpforbutton.add(buttonchange);
		jpforbutton.add(buttonreturn);
		
		buttonchange.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				String number = jtnumber.getText();
				String name = jtname.getText();
				String sex = jtsex.getText();
				String birthday = jtbirthday.getText();
				String department = jtdepartment.getText();
				//change
				
                File file = new File ("E:\java用文件","file.txt");
				
                FileInputStream fin = null;
				ObjectInputStream ois = null;
				
		        try{
		        	fin = new FileInputStream(file);  //
					ois = new ObjectInputStream(fin);      //
		        	
					TreeMap<String,student> tm = (TreeMap)ois.readObject();      //???
					
					fin.close();
					ois.close();
					//insert
					if(tm.containsKey(number)){
					student stu = new student(number,name,sex,birthday,department);
	                
	                tm.put(stu.number,stu);
	                
	                FileOutputStream fout = null;
					ObjectOutputStream oos = null;
					try{
						fout = new FileOutputStream(file);  
						oos = new ObjectOutputStream(fout);      
						oos.writeObject(tm);                    
						oos.close();   
					    JOptionPane.showMessageDialog(null,"世界线已经发生了变动 el psy congroo！");
					}catch (IOException er){
						er.printStackTrace();
						System.out.println("writeobject go die");
					}
		        }
					else{
						System.out.println("number is not exist!");
			        	JOptionPane.showMessageDialog(null,"学号:excuse me?",
			                      "warning",JOptionPane.WARNING_MESSAGE);
					}
					//
					
		        }catch(Exception et){
		        	System.out.println("go die!");
		        	et.printStackTrace();
		        }
                
                //TreeMap<String,student> tm = new TreeMap<String,student>();
                
                
				jtnumber.setText(null);
				jtname.setText(null);
				jtsex.setText(null);
				jtbirthday.setText(null);
				jtdepartment.setText(null);
				
				//change end
			}
			
			
		});
		
		
		buttonreturn.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				//Window window = new Window();			
			}			
		});
		
		this.setTitle("修改学生信息");
		this.setLayout(new GridLayout(9,1));
		this.add(jpnumber);
		this.add(jpname);
		this.add(jpsex);
		this.add(jpbirthday);
		this.add(jpdepartment);
		this.add(jpforbutton);
		this.setLocation(400,300);
		this.setSize(350,300);
		this.setVisible(true);
		
		
	}
	
	
}

　　

Delete是删除功能

package JavaStuIO;

import java.sql.*;
import java.util.TreeMap;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.html.HTMLDocument.Iterator;

import java.io.*;

import JavaStuIO.WindowIO;
import JavaStuIO.Add;


   public class Delete extends JFrame {
		private static final long serialVersionUID = -1928970409928880648L;
			
		//TreeMap<String,student> tm = new TreeMap<String,student>();      //treemap
		
		JLabel jlnumber = new JLabel("学号：");
		
		JTextField jtnumber = new JTextField("",20);
		
		JButton buttondelete = new JButton("删除");
		JButton buttonreturn = new JButton("返回");
		
		
		public Delete() {
			

			
			
			JPanel jpnumber = new JPanel();
			JPanel jpforbutton = new JPanel(new GridLayout(1,1));
			
			jpnumber.add(jlnumber);
			jpnumber.add(jtnumber);
			
			jpforbutton.add(buttondelete);
			jpforbutton.add(buttonreturn);
			
			buttondelete.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e){
					//delete
					
					String number = jtnumber.getText();
				
					File file =new File("E:\java用文件","file.txt");
					
					//TreeMap<String,student> tm = new TreeMap<String,student>();
					
					FileInputStream fin = null;
					ObjectInputStream ois = null;
					
			        try{
			        	fin = new FileInputStream(file);  //
						ois = new ObjectInputStream(fin);      //
			        
						TreeMap<String,student> tm = (TreeMap)ois.readObject();      //???
					
						//insert
						 if(tm.containsKey(number))
					        {
					        	tm.remove(number);             //remove
					        	
					        	System.out.println("delete ok!!!");
					        	
					        	jtnumber.setText(null);
					        	
					        	FileOutputStream fout = null;
								ObjectOutputStream oos = null;
					        	
								try{
									fout = new FileOutputStream(file);  //
									oos = new ObjectOutputStream(fout);      //
									oos.writeObject(tm);                    //
									oos.close();                             
									JOptionPane.showMessageDialog(null,"这个人已经不存在了呢 ");
								}catch (IOException er){
									er.printStackTrace();
									System.out.println("writeobject go die");
								}
					        	
					        }
					        else
					        {
					        	System.out.println("number is not exist!");
					        	JOptionPane.showMessageDialog(null,"学号:excuse me?",
					                      "warning",JOptionPane.WARNING_MESSAGE);
					        }
						
					   //insert  end
						fin.close();
						ois.close();
			        }catch(Exception et){
			        	System.out.println("go die!");
			        	et.printStackTrace();
			        }
			        
			       
			        
//			        if(tm.isEmpty())
//			        {
//			        	System.out.println("!!!!!!!!!!!!");
//			        	
//			        }
			        
			        //delete end    E:\java用文件","file.txt
				}
				
				
			});
			
			buttonreturn.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e){
					//Window window = new Window();			
				}			
			});
			
			
			this.setTitle("删除学生信息");
			this.setLayout(new GridLayout(9,1));
			this.add(jpnumber);
			this.add(jpforbutton);
			this.setLocation(400,300);
			this.setSize(350,300);
			this.setVisible(true);
			
			
		}
		
	    
	    
	}
	
	

　　

Look是浏览功能

package JavaStuIO;

import java.sql.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.io.*;

import JavaStuIO.WindowIO;

public class Look extends JFrame {
	private static final long serialVersionUID = -1928970409928880648L;
	
	Connection conn = null;
	PreparedStatement ps = null;
	ResultSet res = null;
	
	
	//JButton buttonlook = new JButton("浏览");
	//JButton buttonreturn = new JButton("返回");
	
	JTable jtable;
	JScrollPane jscrollpane = new JScrollPane();
	
	Vector columnNames = null;
	Vector rowData = null;
	
	public Look() {
		JPanel jpforbutton = new JPanel(new GridLayout(1,1));

		columnNames = new Vector();
		columnNames.add("学号");
		columnNames.add("姓名");
		columnNames.add("性别");
		columnNames.add("出生日期");
		columnNames.add("学院");
		rowData = new Vector();
		
		JTextArea jtext = new JTextArea(16,30);
		
		
		
		//jpforbutton.add(buttonlook);
		//jpforbutton.add(buttonreturn);
		
		File file =new File("E:\java用文件","file.txt");
		
		FileInputStream fin = null;
		ObjectInputStream ois = null;
		
        try{
        	fin = new FileInputStream(file);  //
			ois = new ObjectInputStream(fin);      //
        	
			TreeMap<String,student> tm = (TreeMap)ois.readObject();      //???
		
			//insert
			if(tm.isEmpty())
			{
				System.out.println("nobody here!");
	        	JOptionPane.showMessageDialog(null,"还没有人惹");
			}
			else
			{
				Set<Map.Entry<String, student>>  tmSet = tm.entrySet();
				Iterator<Map.Entry<String,student>> treeIt = tmSet.iterator();
				
				while(treeIt.hasNext())
				{
					Map.Entry<String , student> treeEntry = treeIt.next();
					Vector hang = new Vector();
					student stu = treeEntry.getValue();
					
					hang.add(stu.number);
					hang.add(stu.name);
					hang.add(stu.sex);
					hang.add(stu.birthday);
					hang.add(stu.department);
					rowData.add(hang);
					
				}
			}
			
			
			//insert end  
			
			fin.close();
			ois.close();
        }catch(Exception et){
        	System.out.println("go die!");
        	et.printStackTrace();
        }
		
		
		
		
		jtable = new JTable(rowData,columnNames);
		jscrollpane = new JScrollPane(jtable);
		
		this.add(jscrollpane);
		this.setTitle("浏览学生信息");
		this.setLayout(new GridLayout(2,5));
		this.add(jpforbutton);
		this.setLocation(300,300);
		this.setSize(500,300);
		this.setVisible(true);
		this.setResizable(false);
		
	}
	
	
}