utilurl.java

MM7彩信对接网关示例

package com.rainbow.util.tools;

/*
 * $Id: UtilURL.java,v 1.1 2005/06/20 09:21:25 wangzhaonan Exp $
 *
 *  Copyright (c) 2001, 2002 The Open For Business Project - www.ofbiz.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a
 *  copy of this software and associated documentation files (the "Software"),
 *  to deal in the Software without restriction, including without limitation
 *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
 *  and/or sell copies of the Software, and to permit persons to whom the
 *  Software is furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included
 *  in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 *  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 *  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
 *  OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 *  THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

import java.net.URL;
import java.io.File;

/**
 * URL Utilities - Simple Class for flexibly working with properties files *
 * @author     <a href="mailto:[e-mail]">David E. Jones</a>
 * @version    $Revision: 1.1 $
 * @since      2.0
 */
public class UtilURL {

    public static URL fromClass(Class contextClass) {
         String resourceName = contextClass.getName();
         int dotIndex = resourceName.lastIndexOf('.');

         if (dotIndex != -1)
             resourceName = resourceName.substring(0, dotIndex);
         resourceName += ".properties";

         return fromResource(contextClass, resourceName);
     }

     public static URL fromResource(String resourceName) {
         return fromResource(resourceName, null);
     }

     public static URL fromResource(Class contextClass, String resourceName) {
         if (contextClass == null)
             return fromResource(resourceName, null);
         else
             return fromResource(resourceName, contextClass.getClassLoader());
     }

     public static URL fromResource(String resourceName, ClassLoader loader) {
         URL url = null;
         if (loader != null && url == null)
             url = loader.getResource(resourceName);
         if (loader != null && url == null)
             url = loader.getResource(resourceName + ".properties");

         if (loader == null) {
             try {
                 loader = Thread.currentThread().getContextClassLoader();

             } catch (SecurityException e) {
                 UtilURL utilURL = new UtilURL();

                 loader = utilURL.getClass().getClassLoader();
             }
         }

         if (url == null)
             url = loader.getResource(resourceName);
         if (url == null)
             url = loader.getResource(resourceName + ".properties");

         if (url == null)
             url = ClassLoader.getSystemResource(resourceName);
         if (url == null)
             url = ClassLoader.getSystemResource(resourceName + ".properties");

         if (url == null)
             url = fromFilename(resourceName);

         return url;
     }

     public static URL fromFilename(String filename) {
         if (filename == null) return null;
         File file = new File(filename);
         URL url = null;

         try {
             if (file.exists()) url = file.toURL();
         } catch (java.net.MalformedURLException e) {
             e.printStackTrace();
             url = null;
         }
         return url;
     }
}