StringUtils.hasText()

1、org.springframework.util包下的 StringUtils.hasText()
StringUtils.hasText():如果字符序列不为 null 值,并且字符序列的长度大于 0 ,并且不含有空白字符序列,则返回 true

public static void main(String[] args) {
        Boolean a = StringUtils.hasText(null);
        System.out.println(a);//false
        Boolean a1 = StringUtils.hasText("");
        System.out.println(a1);//false
        Boolean a2 = StringUtils.hasText(" ");
        System.out.println(a2);//false
        Boolean a3 = StringUtils.hasText(" ,");
        System.out.println(a3);//true
    }