/** * 如果参数为null,返回true * * @author hechenglong * @param patterns * @return */ public static boolean isNull(Object... patterns){ if(patterns == null || patterns.length == 0) return true; for (Object obj : patterns) { if(obj == null || "".equals(obj) || "".equals(obj.toString().trim()) || "null".equalsIgnoreCase(obj.toString())){ return true; } } return false; } /** * 如果参数不为null,返回true * @author hechenglong * @param patterns * @return */ public static boolean notNull(Object... patterns){ return !isNull(patterns); }
card = null ? 0 :2
某些情况代替 if 使用