StringUtils (euler-common-util 0.0.6 API)

java.lang.Object
- net.eulerframework.common.util.StringUtils

public abstract class StringUtils
extends Object

构造器概要

构造器
构造器和说明

StringUtils()

构造器
构造器和说明
`StringUtils()`

方法概要

所有方法静态方法具体方法
限定符和类型	方法和说明
`static String`	`camelCaseToUnderLineCase(String str)` 把驼峰风格的字符串转换为下划线风格，连续的下划线会被替换为一个。
`static String`	`convertReturnToSpace(String str)` 将换行符替换为空格
`static String`	`convertToLF(String str)` 将CRLF和CR换行符转换为LF换行符
`static String`	`earseMultiSpcases(String str)` 将制表符和多个连续的空格用一个空格替代
`static String`	`earseReturn(String str)` 删除换行符
`static boolean`	`hasLength(CharSequence str)` Check that the given `CharSequence` is neither `null` nor of length 0.
`static boolean`	`hasLength(String str)` Check that the given `String` is neither `null` nor of length 0.
`static boolean`	`hasText(CharSequence str)` Check whether the given `CharSequence` contains actual text.
`static boolean`	`hasText(String str)` Check whether the given `String` contains actual text.
`static boolean`	`isEmpty(Object str)` Check whether the given `String` is empty.
`static boolean`	`isNull(String str)` Check whether the given `String` is empty or string "null".
`static String`	`randomString(int length)` 随机生成字符串,字符串可能的取值在ASCII 0x21-0x7e之间
`static String`	`subStringByBytes(String str, int subBytes, String suffix)` 按字节长度截取字符串
`static String`	`toLowerCamelCase(String str)`
`static String`	`toLowerCaseFirstChar(String str)` 首字母转小写
`static String`	`toPinYinString(String str)` 将字符串转换为拼音
`static String`	`toUnderlineNomenclature(String str)` 将字符串转为下划线命名法，连续的空白字符会被转换为一个下划线表示
`static String`	`toUpperCamelCase(String str)`
`static String`	`toUpperCaseFirstChar(String str)` 首字母转大写
`static String`	`trim(String string)` 去除字符串头尾的空白,与`String.trim()`的区别在于可以处理空对象

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
  - StringUtils
```
public StringUtils()
```
- 方法详细资料
  - trim
```
public static String trim(String string)
```
    去除字符串头尾的空白,与String.trim()的区别在于可以处理空对象
    
    参数:
    
    string - 待处理的字符串
    
    返回:
    
    处理后的字符串
  - isNull
```
public static final boolean isNull(String str)
```
    Check whether the given String is empty or string "null".
    
    参数:
    
    str - the candidate String
    
    返回:
    
    true if the str is null, "" or "null"
  - isEmpty
```
public static boolean isEmpty(Object str)
```
    Check whether the given String is empty.
    This method accepts any Object as an argument, comparing it to null and the empty String. As a consequence, this method will never return true for a non-null non-String object.
    The Object signature is useful for general attribute handling code that commonly deals with Strings but generally has to iterate over Objects since attributes may e.g. be primitive value objects as well.
    
    参数:
    
    str - the candidate String
    
    返回:
    
    true if the str is null or ""
    
    从以下版本开始:
    
    3.2.1
  - hasLength
```
public static boolean hasLength(CharSequence str)
```
    Check that the given CharSequence is neither null nor of length 0.
    Note: this method returns true for a CharSequence that purely consists of whitespace.
```
 StringUtils.hasLength(null) = false
 StringUtils.hasLength("") = false
 StringUtils.hasLength(" ") = true
 StringUtils.hasLength("Hello") = true
 
```
    参数:
    
    str - the CharSequence to check (may be null)
    
    返回:
    
    true if the CharSequence is not null and has length
    
    另请参阅:
    
    hasText(String)
  - hasLength
```
public static boolean hasLength(String str)
```
    Check that the given String is neither null nor of length 0.
    Note: this method returns true for a String that purely consists of whitespace.
    
    参数:
    
    str - the String to check (may be null)
    
    返回:
    
    true if the String is not null and has length
    
    另请参阅:
    
    hasLength(CharSequence), hasText(String)
  - hasText
```
public static boolean hasText(CharSequence str)
```
    Check whether the given CharSequence contains actual text.
    More specifically, this method returns true if the CharSequence is not null, its length is greater than 0, and it contains at least one non-whitespace character.
```
 StringUtils.hasText(null) = false
 StringUtils.hasText("") = false
 StringUtils.hasText(" ") = false
 StringUtils.hasText("12345") = true
 StringUtils.hasText(" 12345 ") = true
 
```
    参数:
    
    str - the CharSequence to check (may be null)
    
    返回:
    
    true if the CharSequence is not null, its length is greater than 0, and it does not contain whitespace only
    
    另请参阅:
    
    Character.isWhitespace(char)
  - hasText
```
public static boolean hasText(String str)
```
    Check whether the given String contains actual text.
    More specifically, this method returns true if the String is not null, its length is greater than 0, and it contains at least one non-whitespace character.
    
    参数:
    
    str - the String to check (may be null)
    
    返回:
    
    true if the String is not null, its length is greater than 0, and it does not contain whitespace only
    
    另请参阅:
    
    hasText(CharSequence)
  - subStringByBytes
```
public static String subStringByBytes(String str,
                                      int subBytes,
                                      String suffix)
```
    按字节长度截取字符串
    
    参数:
    
    str - 要截取的字符串
    
    subBytes - 截取字节长度
    
    suffix - 如果发生截取,在结果后添加的后缀,为null表示不添加
    
    返回:
    
    截取后字符串
  - earseMultiSpcases
```
public static String earseMultiSpcases(String str)
```
    将制表符和多个连续的空格用一个空格替代
    
    参数:
    
    str - 待处理的字符串
    
    返回:
    
    处理后的字符串
  - convertToLF
```
public static String convertToLF(String str)
```
    将CRLF和CR换行符转换为LF换行符
    
    参数:
    
    str - 待处理的字符串
    
    返回:
    
    处理后的字符串
  - convertReturnToSpace
```
public static String convertReturnToSpace(String str)
```
    将换行符替换为空格
    
    参数:
    
    str - 待处理的字符串
    
    返回:
    
    处理后的字符串
  - earseReturn
```
public static String earseReturn(String str)
```
    删除换行符
    
    参数:
    
    str - 待处理的字符串
    
    返回:
    
    处理后的字符串
  - toUnderlineNomenclature
```
public static String toUnderlineNomenclature(String str)
```
    将字符串转为下划线命名法，连续的空白字符会被转换为一个下划线表示
    
    参数:
    
    str - 待转换的字符串
    
    返回:
    
    转换后的字符串
  - toLowerCamelCase
```
public static String toLowerCamelCase(String str)
```
  - toUpperCamelCase
```
public static String toUpperCamelCase(String str)
```
  - camelCaseToUnderLineCase
```
public static String camelCaseToUnderLineCase(String str)
```
    把驼峰风格的字符串转换为下划线风格，连续的下划线会被替换为一个。
```
 StringUtils.camelCaseToUnderLineCase("EulerFramework") = "euler_framework"
 StringUtils.camelCaseToUnderLineCase("Euler_Framework") = "euler_framework"
 StringUtils.camelCaseToUnderLineCase("Euler__Framework") = "euler_framework"
 StringUtils.camelCaseToUnderLineCase("Euler_framework") = "euler_framework"
 StringUtils.camelCaseToUnderLineCase("eulerFramework") = "euler_framework"
 
```
    参数:
    
    str - 峰风格的字符串
    
    返回:
    
    下划线风格字符串
  - toLowerCaseFirstChar
```
public static String toLowerCaseFirstChar(String str)
```
    首字母转小写
    
    参数:
    
    str - 待转换的字符串
    
    返回:
    
    转换后的字符串
  - toUpperCaseFirstChar
```
public static String toUpperCaseFirstChar(String str)
```
    首字母转大写
    
    参数:
    
    str - 待转换的字符串
    
    返回:
    
    转换后的字符串
  - randomString
```
public static String randomString(int length)
```
    随机生成字符串,字符串可能的取值在ASCII 0x21-0x7e之间
    
    参数:
    
    length - 生成的字符串长度
    
    返回:
    
    生成的字符串
  - toPinYinString
```
public static String toPinYinString(String str)
```
    将字符串转换为拼音
    
    参数:
    
    str - 原字符串
    
    返回:
    
    拼音

类 StringUtils

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

StringUtils

方法详细资料

trim

isNull

isEmpty

hasLength

hasLength

hasText

hasText

subStringByBytes

earseMultiSpcases

convertToLF

convertReturnToSpace

earseReturn

toUnderlineNomenclature

toLowerCamelCase

toUpperCamelCase

camelCaseToUnderLineCase

toLowerCaseFirstChar

toUpperCaseFirstChar

randomString

toPinYinString