public class E{public static void main(String[] args) throws Exception {      String pathA = "/a/b/c/d/g/m/1.txt";     String pathB = "/c/b/c/d/g/h/2.txt";     System.out.println(pathARelativePathBRecursion(pathA,pathB,"")); }  /**  * pathA相对于pathB的相对路径 递归算法:  *   * @param pathA  * @param pathB  * @param i  * @return  */ public static String pathARelativePathBRecursion(String pathA,String pathB, String tempPath) {	System.out.println(tempPath);	if (pathB==""||pathB==null)	System.out.println("null");	else 	System.out.println(pathB);	if (pathA.startsWith(pathB))	return pathA.replaceFirst(pathB+"/",tempPath.substring(0,tempPath.length()-3));	else	return pathARelativePathBRecursion(pathA, pathB.substring(0, pathB.lastIndexOf("/")), "../" + tempPath); }}