import java.io.File; import java.io.IOException; import java.net.URL; import java.util.ArrayList; import java.util.Enumeration; import java.util.List; /** * * <p> * Title: PackageUtils.java * </p> * <p> * E-Mail: [email protected] * </p> * <p> * QQ: 176291935 * </p> * <p> * Http: iaiai.iteye.com * </p> * <p> * Create time: 2011-8-2 * </p> * * @author 丸子 * @version 0.0.1 */ public class PackageUtils { /** * 扫描给定包及子包内的所有类 * * @param packageName * 给定的包名 * @return The classes * @throws ClassNotFoundException * @throws IOException */ private static Class[] getClasses(String packageName) throws ClassNotFoundException, IOException { Class cla = PackageUtils.class; String path = packageName.replace('.', '/'); Enumeration<URL> resources = cla.getClassLoader().getResources(path); List<File> dirs = new ArrayList<File>(); while (resources.hasMoreElements()) { URL resource = resources.nextElement(); dirs.add(new File(resource.getFile())); } ArrayList<Class> classes = new ArrayList<Class>(); for (File directory : dirs) { classes.addAll(findClasses(directory, packageName)); } return classes.toArray(new Class[classes.size()]); } /** * 找到制定包内的所有class文件 * * @param directory * 目录名称 * @param packageName * 包名称 * @return The classes * @throws ClassNotFoundException */ private static List<Class> findClasses(File directory, String packageName) throws ClassNotFoundException { List<Class> classes = new ArrayList<Class>(); if (!directory.exists()) { return classes; } File[] files = directory.listFiles(); for (File file : files) { if (file.isDirectory()) { classes.addAll(findClasses(file, packageName + "." + file.getName())); } else if (file.getName().endsWith(".class")) { classes.add(Class.forName(packageName + '.' + file.getName().substring(0, file.getName().length() - 6))); } } return classes; } /** * @throws IOException * @throws ClassNotFoundException * */ public static void main(String[] args) throws Exception { Class[] clas = PackageUtils.getClasses("org"); for (Class cla : clas) { System.out.println(cla.getName()); } } }
扫描给定包及子包内的所有类
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转载自iaiai.iteye.com/blog/1137844
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