import java.io.*;
import java.util.*;
import java.text.*;
public class infomodel
{
	//說明學(xué)生信息系統(tǒng)的存儲(chǔ)空間
	Student[] students;
	//說明當(dāng)前學(xué)生的個(gè)數(shù)
	int numberofstudent ;
	//構(gòu)造方法
	public infomodel()
	{
		 students =new Student[1000];
		 //實(shí)例化學(xué)生數(shù)組
		  numberofstudent=0;
		  //初始化學(xué)生個(gè)數(shù)
	}
	//插入一條新的學(xué)生記錄
	public void insert(BufferedReader readStream)
	{
		String sno=null;
		//定義并初始化學(xué)生學(xué)號(hào)
		String name=null;
		//定義并初始化學(xué)生姓名
		String sex=null;
		//定義并初始化學(xué)生性別
		String department=null;
		//定義并初始化學(xué)生部門
		String enrollmentdate=null;
		//定義并初始化學(xué)生出生日期
		
		try
		{
			System.out.println("請(qǐng)輸入學(xué)號(hào):");
			sno=readStream.readLine ();
			//從鍵盤輸入學(xué)號(hào)

		}
		catch (IOException e)
		{
			e.printStackTrace();
			//捕捉IO異常
		}
			students[numberofstudent++]=new Student(sno,name,sex,department,getdate(enrollmentdate));
	        //裝載數(shù)組
	}
		//字符串yyyy-hh-dd到日期的轉(zhuǎn)換
	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());
		   //把指定的年月日轉(zhuǎn)化為日期整數(shù)

		   Calendar now =Calendar.getInstance();
		   now.clear();
		   now.set(year,month-1,day);
	         return now.getTime();
}
	
	//刪除一條學(xué)生記錄
	public void delete (BufferedReader readStream)
	
	{
		String sno=null;
		System.out.println("請(qǐng)輸入學(xué)號(hào):");
		try
			{
			sno=readStream.readLine();

			}
		catch (IOException e)
			{
				e.printStackTrace();
			}
		//開始刪除
		for (int i=0;i<numberofstudent ;i++ )
		{
			if (students[i].getSno().equals(sno))
			{
				//通過前移操作實(shí)現(xiàn)刪除
				for (int j=i;j<numberofstudent ; j++)
				{
					students[j]=students[j+1];
					//修正目前學(xué)生記錄
					numberofstudent--;
					break;
				}
			 }
		}
	}
	//修改學(xué)生記錄
      
	public void update (BufferedReader readStream)
		{

		String sno=null;
		System.out.println("請(qǐng)輸入學(xué)號(hào):");
		try
			{
			sno=readStream.readLine();

			}
		catch (IOException e)
			{
				e.printStackTrace();
			}
			for (int i=0;i<numberofstudent ;i++ )
		{
			if (students[i].getSno().equals(sno))
			{
				for (int j=i;j<=numberofstudent ; j++)
				{
					students[j]=students[i];
				}
			}
		}
				
	}
		//顯示學(xué)生記錄的方法
	public void query(BufferedReader readStream)
	{
		int flag=0;
		String sno = null;
		for (int i=0;i<numberofstudent ;i++ )
		{
			flag=1;
			System.out.println("請(qǐng)輸入記錄號(hào)"+(i=1));
			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("目前還沒記錄");
			}
		}
	}
	//批量裝入學(xué)生記錄的方法
	public void load ()
	{
		String sno=null;
		String name=null;
		String sex=null;
		String EnrollmentDate=null;
		String department=null;
		String in;
		//定義成員變量
		//從指定文件中讀取學(xué)生信息
		try
		{
			
			BufferedReader infile = new BufferedReader(new FileReader("e:\\inf\\xuesheng.txt"));
			//建立鍵盤輸入流
			while ((in=infile.readLine())!=null)
			{
				StringTokenizer str =new StringTokenizer(in,"1");
				
				 sno=str.nextToken();
				 name=str.nextToken();
				 sex=str.nextToken();
				 EnrollmentDate=str.nextToken();
				 department=str.nextToken();
				//依次獲得學(xué)號(hào)，姓名，性別，出生年月日和所在院系名稱
				students[numberofstudent++]=new Student(sno,name,sex,department,getdate(EnrollmentDate));
			//裝載到數(shù)組
			}
		}
		catch (FileNotFoundException e)
		{
			e.printStackTrace();
		}
		catch  (IOException e)
		{
			System.out.println("I/O操作出現(xiàn)異常"); 
		}
	

	}

	//存儲(chǔ)學(xué)生記錄的方法
	public void  saveto()
	{
      try
		{
			BufferedWriter outfile = new BufferedWriter(new FileWriter("e:\\inf\\xuesheng.txt"));
			//建立文件輸出流(writer)
			
			for (int i=0;i<numberofstudent;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();
                //開始寫數(shù)據(jù)
			}
		outfile.close();
		//關(guān)閉流
		}
		catch (IOException e)
		{
			System.out.println("I/O操作出現(xiàn)異常"); 

		}


	}
	
}