infomodel.java

这是学生信息管理系统的文件版本

package com.JavaSeries.Java.component;
import java.io.*;
import java.util.*;
import java.text.*;
import com.JavaSeries.Java.component.Student;

public class InfoModel
{
	Student []students;
	int NumberofStudents;
   
	public InfoModel()
	{
		students = new Student[100];
		NumberofStudents = 0;
	}
	
	public void insert(BufferedReader readStream)
	{
		String Sno = null;
		String name = null;
		String sex = null;
		String Department = null;
		String EnrollmentDate = null;
		System.out.println("请输入学生信息！");
		try
		{
			System.out.println("请输入学号:");
			Sno = readStream.readLine();
			System.out.println("请输入姓名:");
			name = readStream.readLine();
			System.out.println("请输入性别:");
			sex = readStream.readLine();
			System.out.println("请输入专业:");
			Department = readStream.readLine();
			System.out.println("请输入出生日期:");
			EnrollmentDate = readStream.readLine();
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}
		students[NumberofStudents++] = new Student(Sno , name , sex , Department , getDate(EnrollmentDate));
	}
	
	public Date getDate(String date)
	{
		StringTokenizer myDate = new StringTokenizer(date , "-");
		int year = Integer.parseInt(myDate.nextToken());
		int month = Integer.parseInt(myDate.nextToken());
		int day = Integer.parseInt(myDate.nextToken());
		Calendar now = Calendar.getInstance();
		now.clear();
		now.set(year,month-1,day);
		return now.getTime();
	}
	
	public void Delete(BufferedReader readStream)
	{
		String sno = null;
		System.out.println("请输入学号:");
		try
		{
			sno = readStream.readLine();
		}	
		catch(IOException e)
		{
			e.printStackTrace();
		}
		for(int i = 0; i < NumberofStudents; i++)
		{
			if(students[i].getSno().equals(sno))
		    {
				for (int j = i; j < NumberofStudents; j++)
					students[j] = students[j+1];
					NumberofStudents--;
					System.out.println("Hello World!");
					break;
		    }
	    }
	} 
	
	public void Update(BufferedReader readStream)
	{
		System.out.print("您选了修改");
		Delete(readStream);
		System.out.print("请输入修改后的数据");
		insert(readStream);
	}

	public void query(BufferedReader readStream)
	{		
		int flag = 0;
		String sno = null;
		System.out.println("请输入学号:");
		try
		{
			sno = readStream.readLine();
		}	
		catch(IOException e)
		{
			System.out.println("Hello World!");
			e.printStackTrace();
		}
		for (int i = 0; i < NumberofStudents; i++)
		{
			if(students[i].getSno().equals(sno))
			{		
				flag = 1;			
				System.out.println(students[i].getName());
				System.out.println(students[i].getSex());
				System.out.println(students[i].getDepartment());
				System.out.println(students[i].getEnrollmentDate());
			}			
		}
		if(flag == 0)
		System.out.println("目前无记录！");		
	}
	
	public void load()
	{
		StringTokenizer tokenizer;
		try
		{	
			BufferedReader infile = new BufferedReader(new FileReader("h:\\inf\\xueshen.txt"));		
			while(infile != null)
			{		 
				tokenizer = new StringTokenizer(infile.readLine());
				String Sno = tokenizer.nextToken();
				String name = tokenizer.nextToken();
				String sex = tokenizer.nextToken();
				String Department = tokenizer.nextToken();
				String EnrollmentDate = tokenizer.nextToken();
				students[NumberofStudents++] = new Student(Sno ,name, sex, Department, getDate(EnrollmentDate));
				System.out.println("Hello World!");
			}			
		}
		catch (FileNotFoundException e)
		{
			System.out.println(e.toString());
		}
		catch(Exception e)
		{
		}
    }
	public void save()
	{ 
		try
		{
			BufferedWriter outfile = new BufferedWriter(new FileWriter("h:\\inf\\xueshen.txt"));
			for(int i = 0; i < NumberofStudents; i++)
			{
				outfile.write(students[i].getSno()+" ");
				outfile.write(students[i].getName()+" ");
				outfile.write(students[i].getSex()+" ");
				outfile.write(students[i].getDepartment()+" ");
				outfile.write(students[i].getEnrollmentDate()+" ");
				outfile.newLine();
			}
			outfile.close();
		}
		catch (IOException e)
		{
		}		
	}
}