public static boolean available(String qualifiedClassName, ClassLoader loader) {
        return ClassLoaderUtils.loadClass(qualifiedClassName, loader) != null;
    }
public static boolean available(String qualifiedClassName, ClassLoader loader) {
        return ClassLoaderUtils.loadClass(qualifiedClassName, loader) != null;
    }
public static boolean available ( String qualifiedClassName , ClassLoader loader ) { return ClassLoaderUtils . loadClass ( qualifiedClassName , loader ) != null ; }
判断一个 Class 是否存在并且可用.
判断一个 Class 是否存在并且可用 .