javabase.lorenwang.common_base_frame.utils

类 SbcbflwRandomStringUtils

java.lang.Object

javabase.lorenwang.common_base_frame.utils.SbcbflwRandomStringUtils

public class SbcbflwRandomStringUtils
extends java.lang.Object

构造器概要

构造器

构造器和说明
SbcbflwRandomStringUtils() RandomStringUtils instances should NOT be constructed in standard programming.

方法概要

限定符和类型	方法和说明
static java.lang.String	random(int count) Creates a random string whose length is the number of characters specified.
static java.lang.String	random(int count, boolean letters, boolean numbers) Creates a random string whose length is the number of characters specified.
static java.lang.String	random(int count, char[] chars) Creates a random string whose length is the number of characters specified.
static java.lang.String	random(int count, int start, int end, boolean letters, boolean numbers) Creates a random string whose length is the number of characters specified.
static java.lang.String	random(int count, int start, int end, boolean letters, boolean numbers, char[] chars) Creates a random string based on a variety of options, using default source of randomness.
static java.lang.String	random(int count, int start, int end, boolean letters, boolean numbers, char[] chars, java.util.Random random) Creates a random string based on a variety of options, using supplied source of randomness.
static java.lang.String	random(int count, java.lang.String chars) Creates a random string whose length is the number of characters specified.
static java.lang.String	randomAlphabetic(int count) Creates a random string whose length is the number of characters specified.
static java.lang.String	randomAlphanumeric(int count) Creates a random string whose length is the number of characters specified.
static java.lang.String	randomAscii(int count) Creates a random string whose length is the number of characters specified.
static java.lang.String	randomNumeric(int count) Creates a random string whose length is the number of characters specified.

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

SbcbflwRandomStringUtils

public SbcbflwRandomStringUtils()

RandomStringUtils instances should NOT be constructed in standard programming. Instead, the class should be used as RandomStringUtils.random(5);.

This constructor is public to permit tools that require a JavaBean instance to operate.

方法详细资料

random

public static java.lang.String random(int count)

Creates a random string whose length is the number of characters specified.

Characters will be chosen from the set of all characters.

参数:

count - the length of random string to create

返回:

the random string

randomAscii

public static java.lang.String randomAscii(int count)

Creates a random string whose length is the number of characters specified.

Characters will be chosen from the set of characters whose ASCII value is between 32 and 126 (inclusive).

参数:

count - the length of random string to create

返回:

the random string

randomAlphabetic

public static java.lang.String randomAlphabetic(int count)

Creates a random string whose length is the number of characters specified.

Characters will be chosen from the set of alphabetic characters.

参数:

count - the length of random string to create

返回:

the random string

randomAlphanumeric

public static java.lang.String randomAlphanumeric(int count)

Creates a random string whose length is the number of characters specified.

Characters will be chosen from the set of alpha-numeric characters.

参数:

count - the length of random string to create

返回:

the random string

randomNumeric

public static java.lang.String randomNumeric(int count)

Creates a random string whose length is the number of characters specified.

Characters will be chosen from the set of numeric characters.

参数:

count - the length of random string to create

返回:

the random string

random

public static java.lang.String random(int count,
                                      boolean letters,
                                      boolean numbers)

Creates a random string whose length is the number of characters specified.

Characters will be chosen from the set of alpha-numeric characters as indicated by the arguments.

参数:

count - the length of random string to create

letters - if true, generated string will include alphabetic characters

numbers - if true, generated string will include numeric characters

返回:

the random string

random

public static java.lang.String random(int count,
                                      int start,
                                      int end,
                                      boolean letters,
                                      boolean numbers)

Creates a random string whose length is the number of characters specified.

Characters will be chosen from the set of alpha-numeric characters as indicated by the arguments.

参数:

count - the length of random string to create

start - the position in set of chars to start at

end - the position in set of chars to end before

letters - if true, generated string will include alphabetic characters

numbers - if true, generated string will include numeric characters

返回:

the random string

random

public static java.lang.String random(int count,
                                      int start,
                                      int end,
                                      boolean letters,
                                      boolean numbers,
                                      char[] chars)

Creates a random string based on a variety of options, using default source of randomness.

This method has exactly the same semantics as random(int,int,int,boolean,boolean,char[],Random), but instead of using an externally supplied source of randomness, it uses the internal static Random instance.

参数:

count - the length of random string to create

start - the position in set of chars to start at

end - the position in set of chars to end before

letters - only allow letters?

numbers - only allow numbers?

chars - the set of chars to choose randoms from. If null, then it will use the set of all chars.

返回:

the random string

抛出:

java.lang.ArrayIndexOutOfBoundsException - if there are not (end - start) + 1 characters in the set array.

random

public static java.lang.String random(int count,
                                      int start,
                                      int end,
                                      boolean letters,
                                      boolean numbers,
                                      char[] chars,
                                      java.util.Random random)

Creates a random string based on a variety of options, using supplied source of randomness.

If start and end are both 0, start and end are set to ' ' and 'z', the ASCII printable characters, will be used, unless letters and numbers are both false, in which case, start and end are set to 0 and Integer.MAX_VALUE.

If set is not null, characters between start and end are chosen.

This method accepts a user-supplied Random instance to use as a source of randomness. By seeding a single Random instance with a fixed seed and using it for each call, the same random sequence of strings can be generated repeatedly and predictably.

参数:

count - the length of random string to create

start - the position in set of chars to start at

end - the position in set of chars to end before

letters - only allow letters?

numbers - only allow numbers?

chars - the set of chars to choose randoms from. If null, then it will use the set of all chars.

random - a source of randomness.

返回:

the random string

抛出:

java.lang.ArrayIndexOutOfBoundsException - if there are not (end - start) + 1 characters in the set array.

java.lang.IllegalArgumentException - if count < 0.

从以下版本开始:

2.0

random

public static java.lang.String random(int count,
                                      java.lang.String chars)

Creates a random string whose length is the number of characters specified.

Characters will be chosen from the set of characters specified.

参数:

count - the length of random string to create

chars - the String containing the set of characters to use, may be null

返回:

the random string

抛出:

java.lang.IllegalArgumentException - if count < 0.

random

public static java.lang.String random(int count,
                                      char[] chars)

Creates a random string whose length is the number of characters specified.

Characters will be chosen from the set of characters specified.

参数:

count - the length of random string to create

chars - the character array containing the set of characters to use, may be null

返回:

the random string

抛出:

java.lang.IllegalArgumentException - if count < 0.