获取web环境中的呼应路径的工具类

获取web环境中的相应路径的工具类

/**   * 获取web环境中的相应路径   *    * @author xwz   * @date Jan 5, 2010   */  public class PathUtil {       public static final String CLASSES = getClassesPath();       public static final String WEB_INF = getWEB_INFPath();       public static final String WEB_ROOT = getWEB_ROOTPath();         /** 获取某个类所在的路径 */      public static String getClassPath(Class cls) {           String s = cls.getResource("").getPath();           if (s.startsWith("/")) s = s.substring(1);           return s;       }         /** 获取classes目录下的资源流 */      public static InputStream getInputStreamFromClasses(String packageNameAndFileName) {           try {               FileInputStream fin = new FileInputStream(CLASSES + packageNameAndFileName);               return fin;           } catch (FileNotFoundException e) {               e.printStackTrace();           }           return null;       }         /** 获取WEB-INF目录下的资源流 */      public static InputStream getInputStreamFromWebInf(String fileName) {           try {               FileInputStream fin = new FileInputStream(WEB_INF + fileName);               return fin;           } catch (FileNotFoundException e) {               e.printStackTrace();           }           return null;       }         /**       * 从jar文件获取资源流       *        * @param oneClassInJar jar里面的一个类       * @param fileName       * @return       * @author xwz       */      public static InputStream getInputStreamFromJar(Class oneClassInJar, String fileName) {           InputStream is = oneClassInJar.getResourceAsStream(fileName);           return is;       }         private static String getClassesPath() {           String s = PathUtil.class.getResource("/").getPath();           if (s.startsWith("/")) s = s.substring(1);           return s;       }         private static String getWEB_INFPath() {           String s = "";             String classes = getClassesPath();           int last = classes.lastIndexOf("classes/");             return classes.substring(0, last);       }         private static String getWEB_ROOTPath() {           String s = "";             String classes = getClassesPath();           int last = classes.lastIndexOf("WEB-INF/classes/");             return classes.substring(0, last);       }         public static void main(String[] args) {           System.out.println(PathUtil.CLASSES);           System.out.println(PathUtil.WEB_INF);           System.out.println(PathUtil.WEB_ROOT);           System.out.println(PathUtil.getClassPath(User.class));             InputStream classesIn = PathUtil.getInputStreamFromClasses("config/fckeditor.cfg");           InputStream webinfIn = PathUtil.getInputStreamFromWebInf("tlds/c.tld");           InputStream jarIn = PathUtil.getInputStreamFromJar(User.class, "/resource/res.txt");       }   }  

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