com.alibaba.nacos.common.utils

类 StringUtils

java.lang.Object

com.alibaba.nacos.common.utils.StringUtils

public class StringUtils
extends Object

string util.

作者:

Nacos

字段概要

字段

限定符和类型	字段和说明
static String	COMMA
static String	DOT
static String	EMPTY

构造器概要

构造器

构造器和说明
StringUtils()

方法概要

限定符和类型	方法和说明
static boolean	containsIgnoreCase(CharSequence str, CharSequence searchStr) Checks if CharSequence contains a search CharSequence irrespective of case, handling null.
static String	defaultIfEmpty(String str, String defaultStr)
static boolean	equals(String str1, String str2)
static boolean	equalsIgnoreCase(CharSequence str1, CharSequence str2) Compares two CharSequences, returning true if they represent equal sequences of characters, ignoring case.
static String	escapeJavaScript(String str)
static boolean	isAllBlank(String... strs) Judge whether all strings are blank.
static boolean	isBlank(String str) Judge whether string is blank.
static boolean	isEmpty(String str)
static boolean	isNotBlank(String str)
static boolean	isNotEmpty(String str)
static String	join(Collection collection, String separator) Join object with input separator.
static String	newStringForUtf8(byte[] bytes)
static String	substringBetween(String str, String open, String close) Substring between two index.
static String	trim(String str)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

DOT

public static final String DOT

另请参阅:

常量字段值

COMMA

public static final String COMMA

另请参阅:

常量字段值

EMPTY

public static final String EMPTY

另请参阅:

常量字段值

构造器详细资料

StringUtils

public StringUtils()

方法详细资料

newStringForUtf8

public static String newStringForUtf8(byte[] bytes)

isBlank

public static boolean isBlank(String str)

Judge whether string is blank.

参数:

str - string

返回:

true if str is null, empty string or only blanks, otherwise false

isAllBlank

public static boolean isAllBlank(String... strs)

Judge whether all strings are blank.

参数:

strs - strings

返回:

true if all strings are blank, otherwise false

isNotBlank

public static boolean isNotBlank(String str)

isNotEmpty

public static boolean isNotEmpty(String str)

isEmpty

public static boolean isEmpty(String str)

defaultIfEmpty

public static String defaultIfEmpty(String str,
                                    String defaultStr)

equals

public static boolean equals(String str1,
                             String str2)

trim

public static String trim(String str)

substringBetween

public static String substringBetween(String str,
                                      String open,
                                      String close)

Substring between two index.

参数:

str - string

open - start index to sub

close - end index to sub

返回:

substring

join

public static String join(Collection collection,
                          String separator)

Join object with input separator.

参数:

collection - collection of objects need to join

separator - separator

返回:

joined string

escapeJavaScript

public static String escapeJavaScript(String str)

containsIgnoreCase

public static boolean containsIgnoreCase(CharSequence str,
                                         CharSequence searchStr)

Checks if CharSequence contains a search CharSequence irrespective of case, handling null. Case-insensitivity is defined as by String.equalsIgnoreCase(String).

A null CharSequence will return false.

 StringUtils.contains(null, *) = false
 StringUtils.contains(*, null) = false
 StringUtils.contains("", "") = true
 StringUtils.contains("abc", "") = true
 StringUtils.contains("abc", "a") = true
 StringUtils.contains("abc", "z") = false
 StringUtils.contains("abc", "A") = true
 StringUtils.contains("abc", "Z") = false
 

参数:

str - the CharSequence to check, may be null

searchStr - the CharSequence to find, may be null

返回:

true if the CharSequence contains the search CharSequence irrespective of case or false if not or null string input

从以下版本开始:

3.0 Changed signature from containsIgnoreCase(String, String) to containsIgnoreCase(CharSequence, CharSequence)

equalsIgnoreCase

public static boolean equalsIgnoreCase(CharSequence str1,
                                       CharSequence str2)

Compares two CharSequences, returning true if they represent equal sequences of characters, ignoring case.

nulls are handled without exceptions. Two null references are considered equal. Comparison is case insensitive.

 StringUtils.equalsIgnoreCase(null, null)   = true
 StringUtils.equalsIgnoreCase(null, "abc")  = false
 StringUtils.equalsIgnoreCase("abc", null)  = false
 StringUtils.equalsIgnoreCase("abc", "abc") = true
 StringUtils.equalsIgnoreCase("abc", "ABC") = true
 

参数:

str1 - the first CharSequence, may be null

str2 - the second CharSequence, may be null

返回:

true if the CharSequence are equal, case insensitive, or both null

从以下版本开始:

3.0 Changed signature from equalsIgnoreCase(String, String) to equalsIgnoreCase(CharSequence, CharSequence)