isEmpty/isNotEmpty/isNotBlank/isBlank-isAnyEmpty/isNoneEmpty/isAnyBlank/isNoneBlank

news/2025/9/24 0:25:41/文章来源:https://www.cnblogs.com/KL2016/p/19108407

#isEmpty系列

StringUtils.isEmpty()

>>>是否为空. 可以看到 " " 空格是会绕过这种空判断,因为是一个空格,并不是严格的空值,会导致 isEmpty(" ")=false

StringUtils.isEmpty(null) = true
StringUtils.isEmpty("") = true
StringUtils.isEmpty(" ") = false
StringUtils.isEmpty(“bob”) = false
StringUtils.isEmpty(" bob ") = false

publicstaticbooleanisEmpty(final CharSequence cs){
return cs == null || cs.length() == 0;
}

StringUtils.isNotEmpty()

>>>相当于不为空 , = !isEmpty()

publicstaticbooleanisNotEmpty(final CharSequence cs){
    return !isEmpty(cs);
}

StringUtils.isAnyEmpty()

>>>是否有一个为空,只有一个为空,就为true.

StringUtils.isAnyEmpty(null) = true
StringUtils.isAnyEmpty(null, “foo”) = true
StringUtils.isAnyEmpty("", “bar”) = true
StringUtils.isAnyEmpty(“bob”, “”) = true
StringUtils.isAnyEmpty(" bob ", null) = true
StringUtils.isAnyEmpty(" ", “bar”) = false
StringUtils.isAnyEmpty(“foo”, “bar”) = false

public static boolean isAnyEmpty(final CharSequence... css){
if(ArrayUtils.isEmpty(css)){
return true;
for(final CharSequence cs :css){
if(isEmpty(cs)){
return true;

}

}
return false;

}

StringUtils.isNoneEmpty()

>>>相当于!isAnyEmpty(css) , 必须所有的值都不为空才返回true

publicstaticbooleanisNoneEmpty(final CharSequence... css){

  return !isAnyEmpty(css);
}

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#isBank系列

StringUtils.isBlank()

>>>是否为真空值(空格或者空值)

StringUtils.isBlank(null) = true
StringUtils.isBlank("") = true
StringUtils.isBlank(" ") = true
StringUtils.isBlank(“bob”) = false
StringUtils.isBlank(" bob ") = false

public static boolean isBlank(final CharSequence cs){
int strLen;
if(cs==nu11(strLen=cs.length())==0){
return true;

}
for(int i=0;i<strLen; i++){
(Character.isWhitespace(cs.charAt(i))== false){
return false;

}}
return true;

}

StringUtils.isNotBlank()

>>>是否真的不为空,不是空格或者空值 ,相当于!isBlank();

public static boolean :isNotBlank(final CharSequence cs)
return !isBlank(cs);

}

StringUtils.isAnyBlank()

>>>是否包含任何真空值(包含空格或空值)

StringUtils.isAnyBlank(null) = true
StringUtils.isAnyBlank(null, “foo”) = true
StringUtils.isAnyBlank(null, null) = true
StringUtils.isAnyBlank("", “bar”) = true
StringUtils.isAnyBlank(“bob”, “”) = true
StringUtils.isAnyBlank(" bob ", null) = true
StringUtils.isAnyBlank(" ", “bar”) = true
StringUtils.isAnyBlank(“foo”, “bar”) = false

publicstaticbooleanisAnyBlank(final CharSequence... css){if (ArrayUtils.isEmpty(css)) { returntrue; }for (final CharSequence cs : css){ if (isBlank(cs)) { returntrue; } }returnfalse;}