public class StringUtils
extends java.lang.Object
Modifier and Type | Field and Description |
---|---|
static java.lang.String |
AMP_ENCODE |
static java.lang.String |
APOS_ENCODE |
static java.lang.String |
GT_ENCODE |
static char[] |
HEX_CHARS |
static java.lang.String |
LT_ENCODE |
static java.lang.String |
MD5 |
static java.lang.String |
QUOTE_ENCODE |
static java.lang.String |
SHA1 |
static java.lang.String |
USASCII |
static java.lang.String |
UTF8 |
Constructor and Description |
---|
StringUtils() |
Modifier and Type | Method and Description |
---|---|
static java.lang.String |
collectionToString(java.util.Collection<java.lang.String> collection) |
static java.lang.String |
encodeHex(byte[] bytes)
Encodes an array of bytes as String representation of hexadecimal.
|
static java.lang.CharSequence |
escapeForXML(java.lang.String string)
Escapes all necessary characters in the String so that it can be used
in an XML doc.
|
static java.lang.String |
hash(java.lang.String data)
Deprecated.
use
SHA1.hex(String) instead. |
static boolean |
isEmpty(java.lang.CharSequence cs)
Returns true if the given CharSequence is empty
|
static boolean |
isNotEmpty(java.lang.CharSequence cs)
Returns true if CharSequence is not null and is not empty, false otherwise
Examples:
isNotEmpty(null) - false
isNotEmpty("") - false
isNotEmpty(" ") - true
isNotEmpty("empty") - true
|
static boolean |
isNullOrEmpty(java.lang.CharSequence cs)
Returns true if the given CharSequence is null or empty.
|
static java.lang.String |
maybeToString(java.lang.CharSequence cs)
Return the String representation of the given char sequence if it is not null.
|
static int |
nullSafeCharSequenceComperator(java.lang.CharSequence csOne,
java.lang.CharSequence csTwo) |
static boolean |
nullSafeCharSequenceEquals(java.lang.CharSequence csOne,
java.lang.CharSequence csTwo) |
static java.lang.String |
randomString(int length)
Returns a random String of numbers and letters (lower and upper case)
of the specified length.
|
static <CS extends java.lang.CharSequence> |
requireNotNullOrEmpty(CS cs,
java.lang.String message) |
static java.lang.String |
returnIfNotEmptyTrimmed(java.lang.String string) |
static byte[] |
toBytes(java.lang.String string) |
public static final java.lang.String MD5
public static final java.lang.String SHA1
public static final java.lang.String UTF8
public static final java.lang.String USASCII
public static final java.lang.String QUOTE_ENCODE
public static final java.lang.String APOS_ENCODE
public static final java.lang.String AMP_ENCODE
public static final java.lang.String LT_ENCODE
public static final java.lang.String GT_ENCODE
public static final char[] HEX_CHARS
public static java.lang.CharSequence escapeForXML(java.lang.String string)
string
- the string to escape.@Deprecated public static java.lang.String hash(java.lang.String data)
SHA1.hex(String)
instead.A hash is a one-way function -- that is, given an input, an output is easily computed. However, given the output, the input is almost impossible to compute. This is useful for passwords since we can store the hash and a hacker will then have a very hard time determining the original password.
data
- the String to compute the hash of.public static java.lang.String encodeHex(byte[] bytes)
bytes
- an array of bytes to convert to a hex string.public static byte[] toBytes(java.lang.String string)
public static java.lang.String randomString(int length)
The specified length must be at least one. If not, the method will return null.
length
- the desired length of the random String to return.public static boolean isNotEmpty(java.lang.CharSequence cs)
cs
- checked CharSequencepublic static boolean isNullOrEmpty(java.lang.CharSequence cs)
cs
- public static boolean isEmpty(java.lang.CharSequence cs)
cs
- public static java.lang.String collectionToString(java.util.Collection<java.lang.String> collection)
public static java.lang.String returnIfNotEmptyTrimmed(java.lang.String string)
public static boolean nullSafeCharSequenceEquals(java.lang.CharSequence csOne, java.lang.CharSequence csTwo)
public static int nullSafeCharSequenceComperator(java.lang.CharSequence csOne, java.lang.CharSequence csTwo)
public static <CS extends java.lang.CharSequence> CS requireNotNullOrEmpty(CS cs, java.lang.String message)
public static java.lang.String maybeToString(java.lang.CharSequence cs)
cs
- the char sequence or null.cs
or null.