org.springframework.util
Class StringUtils

public abstract class StringUtils

Miscellaneous string utility methods. This class delivers some simple functionality that should really be provided by the core Java String and StringBuffer classes, such as the ability to replace all occurrences of a given substring in a target string. It also provides easy-to-use methods to convert between delimited strings, such as CSV strings, and collections and arrays.

Author:

Rod Johnson

Version: $Id: StringUtils.java,v 1.4 2003/10/09 18:18:41 jhoeller Exp $

Since: 16 April 2001

public static String[] addStringToArray(String[] arr, String s)

public static String arrayToCommaDelimitedString(Object[] arr)

Convenience method to return a String array as a CSV String. Useful for toString() implementations.

Parameters:

arr - array to display. Elements may be of any type (toString() will be called on each element).

public static String arrayToDelimitedString(Object[] arr, String delim)

Convenience method to return a String array as a delimited (e.g. CSV) String. Useful for toString() implementations

Parameters:

arr - array to display. Elements may be of any type (toString() will be called on each element).

delim - delimiter to use (probably a ,)

public static String collectionToCommaDelimitedString(Collection c)

Convenience method to return a Collection as a CSV String. Useful for toString() implementations.

Parameters:

c - Collection to display

public static String collectionToDelimitedString(Collection c, String delim)

Convenience method to return a Collection as a delimited (e.g. CSV) String. Useful for toString() implementations.

Parameters:

c - Collection to display

delim - delimiter to use (probably a ",")

public static Set commaDelimitedListToSet(String s)

Convenience method to convert a CSV string list to a set. Note that this will suppress duplicates.

Parameters:

s - CSV String

Returns: a Set of String entries in the list

public static String[] commaDelimitedListToStringArray(String s)

Convert a CSV list into an array of Strings.

Parameters:

s - CSV list

Returns: an array of Strings. Returns the empty array if s is null.

public static int countOccurrencesOf(String s, String sub)

Count the occurrences of the substring in string s

Parameters:

s - string to search in. Returns 0 if this is null

sub - string to search for. Return 0 if this is null.

public static String delete(String inString, String pattern)

Delete all occurrences of the given substring.

Parameters:

pattern - pattern to delete all occurrences of

public static String deleteAny(String inString, String chars)

Delete any character in a given string.

Parameters:

chars - characters to delete e.g. az\n will delete as, zs and new lines

public static String[] delimitedListToStringArray(String s, String delimiter)

Take a String which is a delimited list and convert it to a String array

Parameters:

s - String

delimiter - delimiter. This will not be returned

Returns: an array of the tokens in the list

public static String replace(String inString, String oldPattern, String newPattern)

Replaces all occurences of a substring within a string with another string.

Parameters:

inString - String to examine

oldPattern - String to replace

newPattern - String to insert

Returns: a String with the replacements

public static String[] tokenizeToStringArray(String s, String delimiters, boolean trimTokens, boolean ignoreEmptyTokens)

Tokenize the given String into a String array via a StringTokenizer.

Parameters:

s - the String to tokenize

delimiters - the delimiter characters, assembled as String

trimTokens - trim the tokens via String.trim

ignoreEmptyTokens - omit empty tokens from the result array

Returns: an array of the tokens

See Also:

StringTokenizer, java.lang.String.trim()