fixed package path return null in executable jar

weixin4j-server/src/main/java/com/foxinmy/weixin4j/util/ClassUtil.java

@@ -41,6 +41,10 @@ public final class ClassUtil {
 	public static List<Class<?>> getClasses(String packageName) {
 		String packageFileName = packageName.replace(POINT, File.separator);
 		URL fullPath = getDefaultClassLoader().getResource(packageFileName);
+		if (fullPath == null) {
+			fullPath = ClassUtil.class.getClassLoader().getResource(
+					packageFileName);
+		}
 		String protocol = fullPath.getProtocol();
 		if (protocol.equals(ServerToolkits.PROTOCOL_FILE)) {
 			try {
@@ -51,7 +55,10 @@ public final class ClassUtil {
 			}
 		} else if (protocol.equals(ServerToolkits.PROTOCOL_JAR)) {
 			try {
-                return findClassesByJar(((JarURLConnection) fullPath.openConnection()).getJarFile(), packageName);
+				return findClassesByJar(
+						((JarURLConnection) fullPath.openConnection())
+								.getJarFile(),
+						packageName);
 			} catch (IOException e) {
 				throw new RuntimeException(e);
 			}
@@ -79,10 +86,12 @@ public final class ClassUtil {
 		if (files != null) {
 			for (File file : files) {
 				if (file.isDirectory()) {
-                    classes.addAll(findClassesByFile(file, packageName + POINT + file.getName()));
+					classes.addAll(findClassesByFile(file, packageName + POINT
+							+ file.getName()));
 				} else {
 					try {
-                        classes.add(Class.forName(packageName + POINT + file.getName().replace(CLASS, "")));
+						classes.add(Class.forName(packageName + POINT
+								+ file.getName().replace(CLASS, "")));
 					} catch (ClassNotFoundException e) {
 						;
 					}
@@ -101,7 +110,8 @@ public final class ClassUtil {
 	 *            包的全限类名
 	 * @return
 	 */
-    private static List<Class<?>> findClassesByJar(JarFile jar, String packageName) {
+	private static List<Class<?>> findClassesByJar(JarFile jar,
+			String packageName) {
 		List<Class<?>> classes = new ArrayList<Class<?>>();
 		Enumeration<JarEntry> jarEntries = jar.entries();
 		while (jarEntries.hasMoreElements()) {
@@ -109,8 +119,10 @@ public final class ClassUtil {
 			if (jarEntry.isDirectory()) {
 				continue;
 			}
-            String className = jarEntry.getName().replace(File.separator, POINT);
+			String className = jarEntry.getName()
-            if (!className.startsWith(packageName) || !className.endsWith(CLASS)) {
+					.replace(File.separator, POINT);
+			if (!className.startsWith(packageName)
+					|| !className.endsWith(CLASS)) {
 				continue;
 			}
 			try {