hitcounter.java

简单的java计数器

package jesse3647.servlet;
import java.io.*;

public class HitCounter
{

	public String getHitCounter(String counterFile) throws IOException
	{
		String counterString;
		int secondDigit;
		
		//Creates a FileInput object and stores number count into count variable
		DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(counterFile)));
		int count = in.readInt();
		in.close();
	    
		//Pulls out the second digit from the counter and stores it
		secondDigit = count / 10;
		secondDigit = secondDigit % 10;
		
		switch (count % 10)
		{
		case 1:	if(secondDigit == 1)
			    {
					counterString = count + "th";
					break;
			    }
				else
				{
					counterString = count + "st";
					break;
				}
		case 2: if(secondDigit == 1)
				{
					counterString = count + "th";
					break;
				}
				else
				{
			  		counterString = count + "nd";
					break;
				}
		case 3: if(secondDigit == 1)
		        {
					counterString = count + "th";
					break;
		        }
				else
				{
					counterString = count + "rd";
					break;
				}
		default: counterString = count + "th";
				 break;
		}						
		
		//Creates FileOutPut object, increaments counter, and counter number in file
 		DataOutputStream out1 = new DataOutputStream((new FileOutputStream(counterFile)));
		out1.writeInt(count + 1);
		out1.close();
		
		//Returns counter
		return counterString;	
	}
}