stringoper.java

这是一个网上书站的例子

package com.string;

import com.codechage.YearMonGet;

public class StringOper {
	public static String transNull(String s)
	{
		if(s==null)
		{
			return "";
		}
		else
		{
			return s;
		}
	}
	public static String getFileName(String filename)
	{
		
		String newname=YearMonGet.getYearMon();
		
		if(filename.endsWith(".JPG")||filename.endsWith(".jpg"))
		{
			newname=newname+".jpg";
		}
		else if(filename.endsWith(".gif")||filename.endsWith(".GIF"))
		{
			newname=newname+".gif";
		}
		else if(filename.endsWith(".bmp")||filename.endsWith(".bmp"))
		{
			newname=newname+".bmp";
		}
		newname="manage/bookimage/"+newname;
		return newname;
	}

}