新浪面試---算出兩個檔案的相對路徑

/** *  * 新浪一道面試題：寫一個函數， * 算出兩個檔案的相對路徑的 遞迴演算法 * */public class Relpath {public static void main(String[] args) throws Exception {      String pathA = "/a/1.txt";     String pathB = "/b/2.txt";     System.out.println(pathARelativePathBRecursion(pathA,pathB,"")); }  /**  * pathA相對於pathB的相對路徑 遞迴演算法:  *   * @param pathA  * @param pathB  * @param i  * @return  */ public static String pathARelativePathBRecursion(String pathA,String pathB, String tempPath) {     if (pathA.startsWith(pathB))         return pathA.replaceFirst(pathB+"/",tempPath.substring(0,tempPath.length()-3));     else         return pathARelativePathBRecursion(pathA, pathB.substring(0, pathB.lastIndexOf("/")), "../" + tempPath); }}