StringUtils
isEmpty() 判断字符串是否为空(在cs为null,""的情况下返回true)
public static boolean isEmpty(final CharSequence cs) { return cs == null || cs.length() == 0; }
public static boolean isBlank(final CharSequence cs) { int strLen; if (cs == null || (strLen = cs.length()) == 0) { return true; } for (int i = 0; i < strLen; i++) { if (!Character.isWhitespace(cs.charAt(i))) { return false; } } return true; }
原文:https://www.cnblogs.com/passex/p/15120755.html