com.alipay.common.tracer.core.utils

类 StringUtils

java.lang.Object

com.alipay.common.tracer.core.utils.StringUtils

public class StringUtils
extends Object

StringUtils

从以下版本开始:

2017/06/17

作者:

yangguanchao

字段概要

字段

限定符和类型	字段和说明
static String	AND
static char	AND_CHARACTER
static String	EMPTY_STRING
static String[]	EMPTY_STRING_ARRAY
static String	EQUAL
static char	EQUAL_CHARACTER
static String	NEWLINE

构造器概要

构造器

构造器和说明
StringUtils()

方法概要

方法

限定符和类型	方法和说明
static String	arrayToString(Object[] items, char separator, String prefix, String postfix)
static String	cleanPath(String path)
static String	collectionToDelimitedString(Collection<?> coll, String delim) Convert a Collection into a delimited String (e.g.
static String	collectionToDelimitedString(Collection<?> coll, String delim, String prefix, String suffix)
static int	countMatches(String str, char c) 对指定的字符串中出现的字符进行计数
static String	deleteAny(String inString, String charsToDelete) Delete any character in a given String.
static String[]	delimitedListToStringArray(String str, String delimiter)
static String[]	delimitedListToStringArray(String str, String delimiter, String charsToDelete) Take a String that is a delimited list and convert it into a String array.
static String	escapeComma(String str)
static String	escapePercentEqualAnd(String str)
static boolean	hasText(CharSequence str)
static boolean	isBlank(String str) 字符串是否为空
static boolean	isNotBlank(String str) 字符串是否不为空
static String	mapToString(Map<String,String> map) 将map转成string, 如{"k1":"v1"}
static String	mapToStringWithPrefix(Map<String,String> map, String prefix) 将map转成string并在每一个 key 添加指定的前缀, 如 {"k1":"v1"}
static String	replace(String inString, String oldPattern, String newPattern) Replace all occurrences of a substring within a string with another string.
static void	stringToMap(String str, Map<String,String> map) 由string转成map, 函数 mapToString 的逆过程
static String[]	toStringArray(Collection<String> collection)
static String	unescapeComma(String str)
static String	unescapeEqualAndPercent(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

NEWLINE

public static final String NEWLINE

另请参阅:

常量字段值

EMPTY_STRING

public static final String EMPTY_STRING

另请参阅:

常量字段值

EQUAL

public static final String EQUAL

另请参阅:

常量字段值

AND

public static final String AND

另请参阅:

常量字段值

EQUAL_CHARACTER

public static final char EQUAL_CHARACTER

另请参阅:

常量字段值

AND_CHARACTER

public static final char AND_CHARACTER

另请参阅:

常量字段值

EMPTY_STRING_ARRAY

public static final String[] EMPTY_STRING_ARRAY

构造器详细资料

StringUtils

public StringUtils()

方法详细资料

isBlank

public static boolean isBlank(String str)

字符串是否为空

参数:

str - 字符串

返回:

true : 字符串为空

isNotBlank

public static boolean isNotBlank(String str)

字符串是否不为空

参数:

str - 字符串

返回:

true : 非空

mapToStringWithPrefix

public static String mapToStringWithPrefix(Map<String,String> map,
                           String prefix)

将map转成string并在每一个 key 添加指定的前缀, 如 {"k1":"v1"}

参数:

map - map 要映射的集合

prefix - prefix 前缀

返回:

字符串携带指定前缀 prefix_k1=v1

mapToString

public static String mapToString(Map<String,String> map)

将map转成string, 如{"k1":"v1"}

参数:

map - 要映射的集合

返回:

字符串 k1=v1

stringToMap

public static void stringToMap(String str,
               Map<String,String> map)

由string转成map, 函数 mapToString 的逆过程

参数:

str - 字符串

map - 映射的集合

escapeComma

public static String escapeComma(String str)

unescapeComma

public static String unescapeComma(String str)

arrayToString

public static String arrayToString(Object[] items,
                   char separator,
                   String prefix,
                   String postfix)

参数:

items - 列表

separator - 分隔符

prefix - 前缀

postfix - 后缀

返回:

字符串

escapePercentEqualAnd

public static String escapePercentEqualAnd(String str)

unescapeEqualAndPercent

public static String unescapeEqualAndPercent(String str)

hasText

public static boolean hasText(CharSequence str)

cleanPath

public static String cleanPath(String path)

collectionToDelimitedString

public static String collectionToDelimitedString(Collection<?> coll,
                                 String delim)

Convert a Collection into a delimited String (e.g. CSV).

Useful for toString() implementations.

参数:

coll - the Collection to convert

delim - the delimiter to use (typically a ",")

返回:

the delimited String

collectionToDelimitedString

public static String collectionToDelimitedString(Collection<?> coll,
                                 String delim,
                                 String prefix,
                                 String suffix)

delimitedListToStringArray

public static String[] delimitedListToStringArray(String str,
                                  String delimiter)

delimitedListToStringArray

public static String[] delimitedListToStringArray(String str,
                                  String delimiter,
                                  String charsToDelete)

Take a String that is a delimited list and convert it into a String array.

A single delimiter may consist of more than one character, but it will still be considered as a single delimiter string, rather than as bunch of potential delimiter characters, in contrast to

参数:

str - the input String

delimiter - the delimiter between elements (this is a single delimiter, rather than a bunch individual delimiter characters)

charsToDelete - a set of characters to delete; useful for deleting unwanted line breaks: e.g. "\r\n\f" will delete all new lines and line feeds in a String

返回:

an array of the tokens in the list

toStringArray

public static String[] toStringArray(Collection<String> collection)

deleteAny

public static String deleteAny(String inString,
               String charsToDelete)

Delete any character in a given String.

参数:

inString - the original String

charsToDelete - a set of characters to delete. E.g. "az\n" will delete 'a's, 'z's and new lines.

返回:

the resulting String

replace

public static String replace(String inString,
             String oldPattern,
             String newPattern)

Replace all occurrences of a substring within a string with another string.

参数:

inString - String to examine

oldPattern - String to replace

newPattern - String to insert

返回:

a String with the replacements

countMatches

public static int countMatches(String str,
               char c)

对指定的字符串中出现的字符进行计数

参数:

str - 要被统计的字符串

c - 出现的字符

返回:

个数