对于处理用户提供的资源路径（可以是相对路径，也可以是绝对路径）很有用。

/*

 * Copyright 2012 Joseph Spencer

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

//package com.nowjava;
/**
N o w  J a v a  .   c o m 提供 
**/


public class Main {

    public static void main(String[] argv) throws Exception {

        String path = "nowjava.com";

        System.out.println(getPathToUse(path));

    }


    /**

     * Useful for handling user supplied paths to resources, which can be both

     * relative and absolute.

     * 

     * @param path

     * @return An absolute path.  The resulting path is not normalized, so ../ 

     * ./ is maintained.

     */

    public static String getPathToUse(String path) {

        String pathToUse;

        if (path.startsWith("/")) {

            pathToUse = path;

        }