旧的Java1.4代码，但这会让您有一个主意：
private static List getClassesFromJARFile(String jar, String packageName) throws Error{ final List classes = new ArrayList(); JarInputStream jarFile = null; try { jarFile = new JarInputStream(new FileInputStream(jar)); JarEntry jarEntry; do { try { jarEntry = jarFile.getNextJarEntry(); } catch(IOException ioe) { throw new CCException.Error("Unable to get next jar entry from jar file '"+jar+"'", ioe); } if (jarEntry != null) { extractClassFromJar(jar, packageName, classes, jarEntry); } } while (jarEntry != null); closeJarFile(jarFile); } catch(IOException ioe) { throw new CCException.Error("Unable to get Jar input stream from '"+jar+"'", ioe); } finally { closeJarFile(jarFile); } return classes;}private static void extractClassFromJar(final String jar, final String packageName, final List classes, JarEntry jarEntry) throws Error{ String className = jarEntry.getName(); if (className.endsWith(".class")) { className = className.substring(0, className.length() - ".class".length()); if (className.startsWith(packageName)) { try { classes.add(Class.forName(className.replace('/', '.'))); } catch (ClassNotFoundException cnfe) { throw new CCException.Error("unable to find class named " + className.replace('/', '.') + "' within jar '" + jar + "'", cnfe); } } }}private static void closeJarFile(final JarInputStream jarFile){ if(jarFile != null) { try { jarFile.close(); } catch(IOException ioe) { mockAction(); } }}
