java类加载文章

(19条消息) 获取class类字节数组的方法_iteye_9747的博客-CSDN博客

public static byte[] loadBytes(Class<?> cls) throws IOException {
    if (cls == null)
        return null;
    String name = cls.getCanonicalName().replaceAll("//.", "/") + ".class";
    InputStream is = ClassLoader.getSystemResourceAsStream(name);
    BufferedInputStream bis = new BufferedInputStream(is);
    try {
        int length = is.available();
        byte[] bs = new byte[length];
        System.err.println("ddd:" + bs.length);
        bis.read(bs);
        is.close();
        return bs;
        } finally {
            bis.close();
        }
    }