How to get absolute path of apache webcontent folder

String relativeWebPath = “/images”;
String absoluteDiskPath = getServletContext().getRealPath(relativeWebPath);

How to check file exist in some directory

public static int checkExists(String directory, String file) {
File dir = new File(directory);
File[] dir_contents = dir.listFiles();
for(int i = 0; i<dir_contents.length;i++) {
if(dir_contents[i].getName().equals(file + “.png”))
return 1;
}
return 0;
}