StringHelper (java-common-helper 2.3 API)

java.lang.Object
- com.library.common.StringHelper

```
public class StringHelper
extends Object
```
General convenience methods for working with Strings

构造器概要

构造器
构造器和说明

StringHelper()

构造器
构造器和说明
`StringHelper()`

方法概要

All Methods Static Methods Concrete Methods
限定符和类型	方法和说明
`static String`	`capitalFirstLetter(String str)` Capital first letter string.
`static boolean`	`changeString2boolean(String string)` Change string 2 boolean boolean.
`static String[]`	`concatenateStringArrays(String[] array1, String[] array2)` Concatenate the given String arrays into one, with overlapping array elements included twice.
`static boolean`	`containsAny(String str, char[] searchChars)` Checks if the String contains any character in the given set of characters.
`static int`	`countOccurrencesOf(String str, String sub)` Count the occurrences of the substring in string s.
`static boolean`	`endsWithIgnoreCase(String str, String suffix)` Check a String ends with another string ignoring the case.
`static String`	`escape(boolean shouldEscape, String src)` Escapes the characters in a `String` using XML entities only if the passed boolean is `true`.
`static String`	`escape(String src)` Escapes the characters in a `String` using XML entities.
`static String`	`extractNumber(String str)` Extract number string.
`static List<String>`	`find(String target, String patten)` Find list.
`static String`	`getBetweenString(String origiString, String beforeStr, String afterStr)` Gets between string.
`static int`	`getRandomInt(int min, int max)` get a random Integer with the range [min, max)
`static int[]`	`getRandomIntWithoutDuplicate(int min, int max, int size)` get a integer array filled with random integer without duplicate [min, max)
`static String[]`	`getTokensArray(String str, String delimeter)` This method is used to split the given string into different tokens at the occurrence of specified delimiter
`static List<String>`	`getTokensList(String str, String delimeter)` This method is used to split the given string into different tokens at the occurrence of specified delimiter
`static boolean`	`isDouble(String str)` Check whether the string is double format or not
`static boolean`	`isEmail(String str)` Check whether the string is email format or not
`static boolean`	`isEmpty(String str)` 判断字符串是否为空
`static boolean`	`isInteger(String str)` Check whether the string is Integer format or not
`static boolean`	`isLetter(String str)` Check if the string is letter or not
`static boolean`	`isNotEmpty(String str)` 判断字符串是否非空
`static boolean`	`isNumber(String str)` Check if the string is a number or not
`static String`	`join(Iterable<?> target, String separator)` Join string.
`static String`	`join(Object[] target, String separator)` Join string.
`static String[]`	`mergeStringArrays(String[] array1, String[] array2)` This method can be used to merge 2 arrays of string values.
`static String`	`removeSpecialChar(String str)` Remove special char string.
`static boolean`	`startsWithIgnoreCase(String str, String prefix)` Check a String starts with another string ignoring the case.
`static String`	`trimAllWhitespace(String str)` Trim all whitespace from the given String: leading, trailing, and inbetween characters.
`static String[]`	`trimArray(String[] values)` This method can be used to trim all the String values in the string array.
`static List<String>`	`trimList(List<String> values)` This method can be used to trim all the String values in the string list.
`static String`	`uncapitalFirstLetter(String str)` Uncapitalizes a String changing the first letter to title case as per `Character.toLowerCase(char)`.
`static String`	`unquote(String str)` This String util method removes single or double quotes from a string if its quoted. for input string = "mystr1" output will be = mystr1 for input string = 'mystr2' output will be = mystr2
`static String`	`urlDecode(String str)` Url decode string.
`static String`	`urlEncode(String str)` Url encode string. url转码

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - StringHelper
```
public StringHelper()
```
- 方法详细资料
  - isEmpty
```
public static boolean isEmpty(String str)
```
    判断字符串是否为空
    
    参数:
    
    str - the str
    
    返回:
    
    the boolean
  - isNotEmpty
```
public static boolean isNotEmpty(String str)
```
    判断字符串是否非空
    
    参数:
    
    str - the str
    
    返回:
    
    the boolean
  - isInteger
```
public static boolean isInteger(String str)
```
    Check whether the string is Integer format or not
    
    参数:
    
    str - the str
    
    返回:
    
    true or false
  - isDouble
```
public static boolean isDouble(String str)
```
    Check whether the string is double format or not
    
    参数:
    
    str - the str
    
    返回:
    
    true or false
  - isEmail
```
public static boolean isEmail(String str)
```
    Check whether the string is email format or not
    
    参数:
    
    str - the str
    
    返回:
    
    true or false
  - isNumber
```
public static boolean isNumber(String str)
```
    Check if the string is a number or not
    
    参数:
    
    str - String to be checked
    
    返回:
    
    boolean boolean
  - isLetter
```
public static boolean isLetter(String str)
```
    Check if the string is letter or not
    
    参数:
    
    str - String to be checked
    
    返回:
    
    boolean boolean
  - extractNumber
```
public static String extractNumber(String str)
```
    Extract number string.
    
    参数:
    
    str - the str
    
    返回:
    
    the string
  - urlEncode
```
public static String urlEncode(String str)
```
    Url encode string. url转码
    
    参数:
    
    str - the str
    
    返回:
    
    the string
  - urlDecode
```
public static String urlDecode(String str)
```
    Url decode string.
    
    参数:
    
    str - the str
    
    返回:
    
    the string
  - changeString2boolean
```
public static boolean changeString2boolean(String string)
```
    Change string 2 boolean boolean.
    
    参数:
    
    string - the string
    
    返回:
    
    the boolean
  - countOccurrencesOf
```
public static int countOccurrencesOf(String str,
                                     String sub)
```
    Count the occurrences of the substring in string s.
    
    参数:
    
    str - string to search in. Return 0 if this is null.
    
    sub - string to search for. Return 0 if this is null.
    
    返回:
    
    the int
  - unquote
```
public static String unquote(String str)
```
    This String util method removes single or double quotes from a string if its quoted. for input string = "mystr1" output will be = mystr1 for input string = 'mystr2' output will be = mystr2
    
    参数:
    
    str - String value to be unquoted.
    
    返回:
    
    value unquoted, null if input is null.
  - endsWithIgnoreCase
```
public static boolean endsWithIgnoreCase(String str,
                                         String suffix)
```
    Check a String ends with another string ignoring the case.
    
    参数:
    
    str - the str
    
    suffix - the suffix
    
    返回:
    
    true or false
  - startsWithIgnoreCase
```
public static boolean startsWithIgnoreCase(String str,
                                           String prefix)
```
    Check a String starts with another string ignoring the case.
    
    参数:
    
    str - the str
    
    prefix - the prefix
    
    返回:
    
    true or false
  - containsAny
```
public static boolean containsAny(String str,
                                  char[] searchChars)
```
    Checks if the String contains any character in the given set of characters. A null String will return false. A null or zero length search array will return false. StringHelper.containsAny(null, *) = false StringHelper.containsAny("", *) = false StringHelper.containsAny(*, null) = false StringHelper.containsAny(*, []) = false StringHelper.containsAny("zzabyycdxx",['z','a']) = true StringHelper.containsAny("zzabyycdxx",['b','y']) = true StringHelper.containsAny("aba", ['z']) = false
    
    参数:
    
    str - the String to check, may be null
    
    searchChars - the chars to search for, may be null
    
    返回:
    
    the true if any of the chars are found, false if no match or null input
    
    从以下版本开始:
    
    2.4
  - trimAllWhitespace
```
public static String trimAllWhitespace(String str)
```
    Trim all whitespace from the given String: leading, trailing, and inbetween characters.
    
    参数:
    
    str - the String to check
    
    返回:
    
    the trimmed String
    
    另请参阅:
    
    java.lang.Character#isWhitespacejava.lang.Character#isWhitespacejava.lang.Character#isWhitespacejava.lang.Character#isWhitespace
  - removeSpecialChar
```
public static String removeSpecialChar(String str)
                                throws PatternSyntaxException
```
    Remove special char string.
    
    参数:
    
    str - the str
    
    返回:
    
    the string
    
    抛出:
    
    PatternSyntaxException - the pattern syntax exception
  - capitalFirstLetter
```
public static String capitalFirstLetter(String str)
```
    Capital first letter string.
    
    参数:
    
    str - the str
    
    返回:
    
    the string
  - uncapitalFirstLetter
```
public static String uncapitalFirstLetter(String str)
```
    Uncapitalizes a String changing the first letter to title case as per Character.toLowerCase(char). No other letters are changed. StringHelper.uncapitalFirstLetter(null) = null StringHelper.uncapitalFirstLetter("") = "" StringHelper.uncapitalFirstLetter("Cat") = "cat" StringHelper.uncapitalFirstLetter("CAT") = "cAT"
    
    参数:
    
    str - the String to uncapitalFirstLetter, may be null
    
    返回:
    
    the uncapitalized String, null if null String input
    
    从以下版本开始:
    
    2.0
    
    另请参阅:
    
    #capitalFirstLetter(String)#capitalFirstLetter(String)#capitalFirstLetter(String)#capitalFirstLetter(String)
  - join
```
public static String join(Object[] target,
                          String separator)
```
    Join string.
    
    参数:
    
    target - the target
    
    separator - the separator
    
    返回:
    
    the string
  - join
```
public static String join(Iterable<?> target,
                          String separator)
```
    Join string.
    
    参数:
    
    target - the target
    
    separator - the separator
    
    返回:
    
    the string
  - getTokensArray
```
public static String[] getTokensArray(String str,
                                      String delimeter)
```
    This method is used to split the given string into different tokens at the occurrence of specified delimiter
    
    参数:
    
    str - The string that needs to be broken
    
    delimeter - The delimiter used to break the string
    
    返回:
    
    a string array
  - getTokensList
```
public static List<String> getTokensList(String str,
                                         String delimeter)
```
    This method is used to split the given string into different tokens at the occurrence of specified delimiter
    
    参数:
    
    str - The string that needs to be broken
    
    delimeter - The delimiter used to break the string
    
    返回:
    
    a instance of java.util.List with each token as one item in list
  - getBetweenString
```
public static String getBetweenString(String origiString,
                                      String beforeStr,
                                      String afterStr)
```
    Gets between string.
    
    参数:
    
    origiString - the origi string
    
    beforeStr - the before str
    
    afterStr - the after str
    
    返回:
    
    the tokens list
  - trimArray
```
public static String[] trimArray(String[] values)
```
    This method can be used to trim all the String values in the string array. For input {" a1 ", "b1 ", " c1"}, the output will be {"a1", "b1", "c1"} Method takes care of null values
    
    参数:
    
    values - the values
    
    返回:
    
    A trimmed array
  - trimList
```
public static List<String> trimList(List<String> values)
```
    This method can be used to trim all the String values in the string list. For input {" a1 ", "b1 ", " c1"}, the output will be {"a1", "b1", "c1"} Method takes care of null values
    
    参数:
    
    values - the values
    
    返回:
    
    A trimmed list
  - mergeStringArrays
```
public static String[] mergeStringArrays(String[] array1,
                                         String[] array2)
```
    This method can be used to merge 2 arrays of string values. If the input arrays are like this array1 = {"a", "b" , "c"} array2 = {"c", "d", "e"} Then the output array will have {"a", "b" , "c", "d", "e"} Note This takes care of eliminating duplicates and checks null values.
    
    参数:
    
    array1 - the array 1
    
    array2 - the array 2
    
    返回:
    
    A merged String Arrays
  - concatenateStringArrays
```
public static String[] concatenateStringArrays(String[] array1,
                                               String[] array2)
```
    Concatenate the given String arrays into one, with overlapping array elements included twice. The order of elements in the original arrays is preserved.
    
    参数:
    
    array1 - the first array (can be null)
    
    array2 - the second array (can be null)
    
    返回:
    
    the new array (null if both given arrays were null)
  - getRandomIntWithoutDuplicate
```
public static int[] getRandomIntWithoutDuplicate(int min,
                                                 int max,
                                                 int size)
```
    get a integer array filled with random integer without duplicate [min, max)
    
    参数:
    
    min - the minimum value
    
    max - the maximum value
    
    size - the capacity of the array
    
    返回:
    
    a integer array filled with random integer without dupulicate
  - getRandomInt
```
public static int getRandomInt(int min,
                               int max)
```
    get a random Integer with the range [min, max)
    
    参数:
    
    min - the minimum value
    
    max - the maximum value
    
    返回:
    
    the random Integer value
  - escape
```
public static String escape(String src)
```
    Escapes the characters in a String using XML entities.
    
    参数:
    
    src - the String to escape, may be null
    
    返回:
    
    a new escaped String, null if null string input
  - escape
```
public static String escape(boolean shouldEscape,
                            String src)
```
    Escapes the characters in a String using XML entities only if the passed boolean is true.
    
    参数:
    
    shouldEscape - the should escape
    
    src - the String to escape.
    
    返回:
    
    a new escaped String if shouldEscape is set to true, an unchanged String otherwise.
  - find
```
public static List<String> find(String target,
                                String patten)
```
    Find list.
    
    参数:
    
    target - the target
    
    patten - the patten
    
    返回:
    
    the list

类 StringHelper

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

StringHelper

方法详细资料

isEmpty

isNotEmpty

isInteger

isDouble

isEmail

isNumber

isLetter

extractNumber

urlEncode

urlDecode

changeString2boolean

countOccurrencesOf

unquote

endsWithIgnoreCase

startsWithIgnoreCase

containsAny

trimAllWhitespace

removeSpecialChar

capitalFirstLetter

uncapitalFirstLetter

join

join

getTokensArray

getTokensList

getBetweenString

trimArray

trimList

mergeStringArrays

concatenateStringArrays

getRandomIntWithoutDuplicate

getRandomInt

escape

escape

find