JAva中パケットのスキャン

   public abstract class PackageScanner {
	
	public abstract void dealClass(Class> klass);
	
	private boolean isClass(Class> klass) {
		if (klass.isAnnotation() 
				|| klass.isInterface()
				|| klass.isEnum()
				|| klass.isPrimitive()) {
			return false;
		}
		return true;
	}
	
	//         
	private void scanPackage(String packageName, File currentFile) {
		//   
		File[] fileList = currentFile.listFiles(new FileFilter() {
			@Override
			public boolean accept(File pathname) {
				if (pathname.isDirectory()) {
					return true;
				}
				return pathname.getName().endsWith(".class");
			}
		});
		for (File file : fileList) {
			if (file.isDirectory()) {
				scanPackage(packageName + "." + file.getName(), file);
			} else {
				String fileName = file.getName().replace(".class", "");
				String className = packageName + "." + fileName;
				try {
					//   
					Class> klass = Class.forName(className);
					//     ，    
					if (!isClass(klass)) {
						continue;
					}
					//   
					dealClass(klass);
				} catch (ClassNotFoundException e) {
					e.printStackTrace();
				}
			}
		}
	}
	
	//jar         
	private void scanPackage(URL url) throws IOException {
		JarURLConnection urlConnection = (JarURLConnection) url.openConnection();
		JarFile jarFile = urlConnection.getJarFile();
		Enumeration jarEntries = jarFile.entries();
		while (jarEntries.hasMoreElements()) {
			JarEntry jarEntry = jarEntries.nextElement();
			String jarEntryName = jarEntry.getName();
			//            
			if (jarEntry.isDirectory() || !jarEntryName.endsWith(".class")) {
				continue;
			} else {
				try {
					String klassName = jarEntryName.replace(".class", "").replace("/", ".");
					//     
					Class> klass = Class.forName(klassName);
					//     ，    
					if(!isClass(klass)) {
						continue;
					}
					//   
					dealClass(klass);
				} catch (ClassNotFoundException e) {
					e.printStackTrace();
				}
			}
		}
	}

	public void packageScan(String packageName) {
		String packageOppositePath = packageName.replace(".", "/");
		ClassLoader classLoder = Thread.currentThread().getContextClassLoader();
		Enumeration resource;
		try {
			resource = classLoder.getResources(packageOppositePath);
			//          
			while (resource.hasMoreElements()) {
				URL url = resource.nextElement();
				//     jar      
				if (url.getProtocol().equals("jar")) {
					scanPackage(url);
				} else {
					File file = new File(url.toURI());
					if (!file.exists()) {
						continue;
					}
					scanPackage(packageName, file);
				}
			}
		} catch (URISyntaxException e) {
			e.printStackTrace();
		} catch (IOException e1) {
			e1.printStackTrace();
		}
	}
}