studentinforeader.java

学生信息读系统（根据学生的学号从存储系统读取学生信息）： 姓名

//Abstract class for reading student's information
//Subclasses should inherit this class and implement
//the abstract method in order to reading information.
//It may read information from the local information files
//information database or others.

public abstract class StudentInfoReader
{
	//The number of courses.
	public final int COURSE_NUMBER=8;
	
	//String array stores the information of a student.
	protected String[] infors=new String[getLen(COURSE_NUMBER)];
	
	//Get student ID.
	public String getStuID()
	{
		return infors[0];
	}
	
	//Get student name.
	public String getStuName()
	{
		return infors[1];
	}
	
	//Get the student birthday.
	public String getBirth()
	{
		return infors[2];
	}
	
	//Get student enrollment time.
	public String getEnrollTime()
	{
		return infors[3];
	}
	
	//Get student tuition.
	public int getTuition()
	{
		Integer in=new Integer(infors[4]);
		return in.intValue();
	}
	
	//Get student course IDs.
	public String[] getCouIDs()
	{
		String[] IDs=new String[COURSE_NUMBER];
		for(int i=0;i<IDs.length;i++)
		{
			IDs[i]=infors[5+i];
		}
		return IDs;
	}
	
	//Get student course names.
	public String[] getCouNames()
	{
		String[] names=new String[COURSE_NUMBER];
		for(int i=0;i<names.length;i++)
		{
			names[i]=infors[5+COURSE_NUMBER+i];
		}
		return names;
	}
	
	//Get student course usual scores.
	public int[] getScoreUsual()
	{
		int[] scores=new int[COURSE_NUMBER];
		for(int i=0;i<scores.length;i++)
		{
			scores[i]=new Integer(infors[5+2*COURSE_NUMBER+i]).intValue();
		}
		return scores;
	}
	
	//Get student course exam scores.
	public int[] getScoreExam()
	{
		int[] examSco=new int[COURSE_NUMBER];
		for(int i=0;i<examSco.length;i++)
		{
			examSco[i]=new Integer(infors[5+3*COURSE_NUMBER+i]).intValue();
		}
		return examSco;
	}
	
	//Write each information into the infors array.
	public boolean readInfos(String stuIDs)
	{
		//The infors array index for writing a information.
		int index=0;
		
		StringBuffer ss=new StringBuffer();
		try
		{
		    char[] chars=read(stuIDs);
		    
		    for(int i=0;i<chars.length;i++)
		    {
			    if(chars[i]=='/')
			    {
				    infors[index]=ss.toString();
			 	    ss=null;
			 	    ss=new StringBuffer();
				    index++;
			    }
			    else
			    {
			        ss.append(chars[i]);
			    }
		    }
		    return true;
		}
		catch(Exception e)
		{
			return false;
		}
	}
		
	//Calculate the array's length.
	protected int getLen(int num)
	{
		int len=5+8*4;
		return len;
	}
	
	//abstract method for reading informations from
	//local files ,dadabase or others.
	public abstract char[] read(String stuID) throws Exception;
}