cn.tdchain.cb.util

类 StringUtils

java.lang.Object

cn.tdchain.cb.util.StringUtils

public final class StringUtils
extends java.lang.Object

String Utility.

版本:

1.0

作者:

Homer.J 2018-06-26

方法概要

限定符和类型	方法和说明
static java.lang.String	clearEmptyChar(java.lang.String text) Clear empty char from String.
static boolean	equals(java.lang.String s1, java.lang.String s2) Compare two nullable string.
static byte[]	getBytes(java.lang.String value) Get bytes with UTF_8 charset.
static boolean	isBlank(java.lang.String value) Checks if a String is whitespace, empty ("") or null.
static boolean	isNotBlank(java.lang.String value) Checks if a String is not empty (""), not null and not whitespace only.
static java.lang.String	newStr(byte[] bytes) New string with UTF_8 charset.
static java.lang.String	repeat(char value, int n) Repeat.
static java.lang.String	subString(java.lang.String value, int start, int end) Gets a substring from the specified String avoiding exceptions.
static java.lang.String	zeros(int n) Repeat zero.
static java.lang.String	zeroSuffix(java.lang.String orig, int length) Get formatted string with zero suffix.

从类继承的方法 java.lang.Object

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

方法详细资料

newStr

public static java.lang.String newStr(byte[] bytes)

New string with UTF_8 charset.

参数:

bytes - byte[]

返回:

string

getBytes

public static byte[] getBytes(java.lang.String value)

Get bytes with UTF_8 charset.

参数:

value - String

返回:

bytes

equals

public static boolean equals(java.lang.String s1,
                             java.lang.String s2)

Compare two nullable string.

参数:

s1 - String

s2 - String

返回:

boolean

isBlank

public static boolean isBlank(java.lang.String value)

Checks if a String is whitespace, empty ("") or null.

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

参数:

value - the String to check, may be null

返回:

true if the String is null, empty or whitespace

isNotBlank

public static boolean isNotBlank(java.lang.String value)

Checks if a String is not empty (""), not null and not whitespace only.

 StringUtils.isNotBlank(null)      = false
 StringUtils.isNotBlank("")        = false
 StringUtils.isNotBlank(" ")       = false
 StringUtils.isNotBlank("bob")     = true
 StringUtils.isNotBlank("  bob  ") = true
 

参数:

value - the String to check, may be null

返回:

true if the String is not empty and not null and not whitespace

subString

public static java.lang.String subString(java.lang.String value,
                                         int start,
                                         int end)

Gets a substring from the specified String avoiding exceptions.

参数:

value - the String to get the substring from, may be null

start - the position to start from, negative means count back from the end of the String by this many characters

end - the position to end at (exclusive), negative means count back from the end of the String by this many characters

返回:

substring from start position to end position, null if null String input

zeroSuffix

public static java.lang.String zeroSuffix(java.lang.String orig,
                                          int length)

Get formatted string with zero suffix.

参数:

orig - original value

length - formatted length

返回:

formatted string

clearEmptyChar

public static java.lang.String clearEmptyChar(java.lang.String text)

Clear empty char from String.

 StringUtils.clearEmptyChar(" tes t") = "test"
 

参数:

text - original text

返回:

text without blank

zeros

public static java.lang.String zeros(int n)

Repeat zero.

参数:

n - number of zeros

返回:

zeros

repeat

public static java.lang.String repeat(char value,
                                      int n)

Repeat.

参数:

value - repeat value

n - repeat times

返回:

repeat value