bboss.org.apache.velocity.util

类 StringUtils

java.lang.Object

bboss.org.apache.velocity.util.StringUtils

public class StringUtils
extends java.lang.Object

This class provides some methods for dynamically invoking methods in objects, and some string manipulation methods used by torque. The string methods will soon be moved into the turbine string utilities class.

构造器概要

构造器

构造器和说明
StringUtils()

方法概要

限定符和类型	方法和说明
boolean	allEmpty(java.util.List list) Check to see if all the string objects passed in are empty.
static java.lang.String	capitalizeFirstLetter(java.lang.String data) Capitalize the first letter but leave the rest as they are.
static java.lang.String	chop(java.lang.String s, int i) Chop i characters off the end of a string.
static java.lang.String	chop(java.lang.String s, int i, java.lang.String eol) Chop i characters off the end of a string.
static java.lang.String	collapseNewlines(java.lang.String argStr) Remove/collapse multiple newline characters.
static java.lang.String	collapseSpaces(java.lang.String argStr) Remove/collapse multiple spaces.
java.lang.String	concat(java.util.List list) Concatenates a list of objects as a String.
static java.lang.String	fileContentsToString(java.lang.String file) Read the contents of a file and place them in a string object.
static java.lang.String	firstLetterCaps(java.lang.String data) Makes the first letter caps and the rest lowercase.
static java.lang.String	getPackageAsPath(java.lang.String pckge) Return a package name as a relative path name
static java.lang.String	normalizePath(java.lang.String path) Return a context-relative path, beginning with a "/", that represents the canonical version of the specified path after ".." and "." elements are resolved out.
static java.lang.String	nullTrim(java.lang.String s) Trim the string, but pass a null through.
static java.lang.String	removeAndHump(java.lang.String data) 'Camels Hump' replacement of underscores.
static java.lang.String	removeAndHump(java.lang.String data, java.lang.String replaceThis) 'Camels Hump' replacement.
static java.lang.String	removeUnderScores(java.lang.String data) 已过时。 Use the org.apache.commons.util.StringUtils class instead. Using its firstLetterCaps() method in conjunction with a StringTokenizer will achieve the same result.
java.lang.String	select(boolean state, java.lang.String trueString, java.lang.String falseString) If state is true then return the trueString, else return the falseString.
static java.lang.String[]	split(java.lang.String line, java.lang.String delim) Create a string array from a string separated by delim
static java.lang.String	stackTrace(java.lang.Throwable e) Returns the output of printStackTrace as a String.
static java.lang.StringBuilder	stringSubstitution(java.lang.String argStr, java.util.Hashtable vars)
static java.lang.StringBuilder	stringSubstitution(java.lang.String argStr, java.util.Map vars) Perform a series of substitutions.
static java.lang.String	sub(java.lang.String line, java.lang.String oldString, java.lang.String newString) Replaces all instances of oldString with newString in line.
static java.util.List	trimStrings(java.util.List list) Trim all strings in a List.

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

concat

public java.lang.String concat(java.util.List list)

Concatenates a list of objects as a String.

参数:

list - The list of objects to concatenate.

返回:

A text representation of the concatenated objects.

getPackageAsPath

public static java.lang.String getPackageAsPath(java.lang.String pckge)

Return a package name as a relative path name

参数:

pckge - package name to convert to a directory.

返回:

String directory path.

removeUnderScores

public static java.lang.String removeUnderScores(java.lang.String data)

已过时。 Use the org.apache.commons.util.StringUtils class instead. Using its firstLetterCaps() method in conjunction with a StringTokenizer will achieve the same result.

Remove underscores from a string and replaces first letters with capitals. Other letters are changed to lower case.

For example foo_bar becomes FooBar but foo_barBar becomes FooBarbar.

参数:

data - string to remove underscores from.

返回:

String

removeAndHump

public static java.lang.String removeAndHump(java.lang.String data)

'Camels Hump' replacement of underscores.

Remove underscores from a string but leave the capitalization of the other letters unchanged.

For example foo_barBar becomes FooBarBar.

参数:

data - string to hump

返回:

String

removeAndHump

public static java.lang.String removeAndHump(java.lang.String data,
                                             java.lang.String replaceThis)

'Camels Hump' replacement.

Remove one string from another string but leave the capitalization of the other letters unchanged.

For example, removing "_" from foo_barBar becomes FooBarBar.

参数:

data - string to hump

replaceThis - string to be replaced

返回:

String

firstLetterCaps

public static java.lang.String firstLetterCaps(java.lang.String data)

Makes the first letter caps and the rest lowercase.

For example fooBar becomes Foobar.

参数:

data - capitalize this

返回:

String

capitalizeFirstLetter

public static java.lang.String capitalizeFirstLetter(java.lang.String data)

Capitalize the first letter but leave the rest as they are.

For example fooBar becomes FooBar.

参数:

data - capitalize this

返回:

String

split

public static java.lang.String[] split(java.lang.String line,
                                       java.lang.String delim)

Create a string array from a string separated by delim

参数:

line - the line to split

delim - the delimter to split by

返回:

a string array of the split fields

chop

public static java.lang.String chop(java.lang.String s,
                                    int i)

Chop i characters off the end of a string. This method assumes that any EOL characters in String s and the platform EOL will be the same. A 2 character EOL will count as 1 character.

参数:

s - String to chop.

i - Number of characters to chop.

返回:

String with processed answer.

chop

public static java.lang.String chop(java.lang.String s,
                                    int i,
                                    java.lang.String eol)

Chop i characters off the end of a string. A 2 character EOL will count as 1 character.

参数:

s - String to chop.

i - Number of characters to chop.

eol - A String representing the EOL (end of line).

返回:

String with processed answer.

stringSubstitution

public static java.lang.StringBuilder stringSubstitution(java.lang.String argStr,
                                                         java.util.Hashtable vars)

参数:

argStr -

vars -

返回:

Substituted String.

stringSubstitution

public static java.lang.StringBuilder stringSubstitution(java.lang.String argStr,
                                                         java.util.Map vars)

Perform a series of substitutions. The substitions are performed by replacing $variable in the target string with the value of provided by the key "variable" in the provided hashtable.

参数:

argStr - target string

vars - name/value pairs used for substitution

返回:

String target string with replacements.

fileContentsToString

public static java.lang.String fileContentsToString(java.lang.String file)

Read the contents of a file and place them in a string object.

参数:

file - path to file.

返回:

String contents of the file.

collapseNewlines

public static java.lang.String collapseNewlines(java.lang.String argStr)

Remove/collapse multiple newline characters.

参数:

argStr - string to collapse newlines in.

返回:

String

collapseSpaces

public static java.lang.String collapseSpaces(java.lang.String argStr)

Remove/collapse multiple spaces.

参数:

argStr - string to remove multiple spaces from.

返回:

String

sub

public static final java.lang.String sub(java.lang.String line,
                                         java.lang.String oldString,
                                         java.lang.String newString)

Replaces all instances of oldString with newString in line. Taken from the Jive forum package.

参数:

line - original string.

oldString - string in line to replace.

newString - replace oldString with this.

返回:

String string with replacements.

stackTrace

public static final java.lang.String stackTrace(java.lang.Throwable e)

Returns the output of printStackTrace as a String.

参数:

e - A Throwable.

返回:

A String.

normalizePath

public static final java.lang.String normalizePath(java.lang.String path)

Return a context-relative path, beginning with a "/", that represents the canonical version of the specified path after ".." and "." elements are resolved out. If the specified path attempts to go outside the boundaries of the current context (i.e. too many ".." path elements are present), return null instead.

参数:

path - Path to be normalized

返回:

String normalized path

select

public java.lang.String select(boolean state,
                               java.lang.String trueString,
                               java.lang.String falseString)

If state is true then return the trueString, else return the falseString.

参数:

state -

trueString -

falseString -

返回:

Selected result.

allEmpty

public boolean allEmpty(java.util.List list)

Check to see if all the string objects passed in are empty.

参数:

list - A list of String objects.

返回:

Whether all strings are empty.

trimStrings

public static java.util.List trimStrings(java.util.List list)

Trim all strings in a List. Changes the strings in the existing list.

参数:

list -

返回:

List of trimmed strings.

从以下版本开始:

1.5

nullTrim

public static java.lang.String nullTrim(java.lang.String s)

Trim the string, but pass a null through.

参数:

s -

返回:

List of trimmed Strings.

从以下版本开始:

1.5