werwer

Spring的StringUtils⼯具类

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原⽂⽹址：

Utils

我们经常会对字符串进⾏操作，spring已经实现了常⽤的处理功能。我们可以使⽤Utils⼯具类帮我们处理字符串。

⼯具类整理如下：

gth(null)=fal;

gth("")=fal;

gth("")=true;

gth("Hello")=true;

5

t(null)=fal;

t("")=fal;

t("")=fal;

t("12345")=true;

t("12345")=true;

11

12//是否包含空⽩字符

nsWhitespace(null)=fal;

nsWhitespace("")=fal;

nsWhitespace("a")=fal;

nsWhitespace("abc")=fal;

nsWhitespace("abc")=fal;

nsWhitespace("")=true;

nsWhitespace("a")=true;

nsWhitespace("abc")=true;

nsWhitespace("ab")=true

nsWhitespace("ab")

23

itespace(null)=null;

itespace("")="";

itespace("")="";

itespace("/t")="";

itespace("a")="a";

itespace("a")="a";

itespace("a")="a";

itespace("ab")="ab";

32

adingWhitespace(null)=null;

adingWhitespace("")="";

adingWhitespace("")="";

adingWhitespace("/t")="";

adingWhitespace("a")="a";

adingWhitespace("a")="a";

adingWhitespace("a")="a";

adingWhitespace("ab")="ab"

adingWhitespace("abc")="abc"

42

ailingWhitespace(null)=null;

ailingWhitespace("")="";

ailingWhitespace("/t")="";

ailingWhitespace("a")="a";

ailingWhitespace("a")="a";

ailingWhitespace("a")="a";

ailingWhitespace("ab")="ab";

ailingWhitespace("abc")="abc";

51

52

lWhitespace("")="";

lWhitespace("")="";

lWhitespace("/t")="";

lWhitespace("a")="a";

lWhitespace("a")="a";

lWhitespace("a")="a";

lWhitespace("ab")="ab";

lWhitespace("abc"="abc";

61//统计⼀个⼦字符串在字符串出现的次数

ccurrencesOf(null,null)==0;

ccurrencesOf("s",null)==0;

ccurrencesOf(null,"s")==0;

ccurrencesOf("erowoiueoiur","WERWER")==0;

ccurrencesOf("erowoiueoiur","x")=0;

ccurrencesOf("erowoiueoiur","")==0;

ccurrencesOf("erowoiueoiur","")==0;

ccurrencesOf("erowoiueoiur","e")==2;

ccurrencesOf("erowoiueoiur","oi")==2;

ccurrencesOf("erowoiueoiur","oiu")==2;

ccurrencesOf("erowoiueoiur","oiur")==1;

ccurrencesOf("erowoiueoiur","r")==2;

74

75//字符串替换

76StringinString="a6AazAaa77abaa";

77StringoldPattern="aa";

78StringnewPattern="foo";

79//Simplereplace

80Strings=e(inString,oldPattern,newPattern);

("a6AazAfoo77abfoo")=true;

82

83//Nonmatch:nochange

84s=e(inString,"qwoeiruqopwieurpoqwieur",newPattern);

(inString)=true

86s=e(inString,oldPattern,null);

(inString)=true

88

89//Nulloldpattern:shouldignore

90s=e(inString,null,newPattern);

(inString)=true

92

93//删除字符串

94StringinString="Thequickbrownfoxjumpedoverthelazydog";

95StringnoThe=(inString,"the");

("Thequickbrownfoxjumpedoverlazydog")=true;

97Stringnohe=(inString,"he");

("Tquickbrownfoxjumpedovertlazydog")=true;

99Stringnosp=(inString,"");

("Thequickbrownfoxjumpedoverthelazydog")=true;

101StringkillEnd=(inString,"dog");

("Thequickbrownfoxjumpedoverthelazy")=true;

103Stringmismatch=(inString,"dxxcxcxog");

(inString)=true;

105

106//删除任何字符

107//源代码如下

108//charc=(i);

109//如果不存在c值，则返回-1

110//if(f(c)==-1){

111//(c);

112//}

113

114StringinString="AblewasIereIsawElba";

115

116Stringres=Any(inString,"I");

("AblewaresawElba")=true;

118res=Any(inString,"AeEba!");

("lwsIrIswl")=true;

120Stringmismatch=Any(inString,"#@$#$^");

(inString)=true;

122

123//源代码如下return(str!=null?"'"+str+"'":null);

124asrtEquals("'myString'",("myString"));

125asrtEquals("''",(""));

126asrtNull((null));

127//将第⼀个字符改⼤写

lize(Str)

129//将第⼀个个字符改⼩写

talize(str)

131

132//mypath/"->"

133//获取字符串⽂件名和扩展名

ename("myfile").equals("myfile")=true;

ename("mypath/myfile".equals("myfile")=true;

ename("mypath/myfile".equals("myfile")=true;

ename("").equals("")=true;

ename("mypath/").equals("")=true;

139

140//获取字符串扩展名,以.分隔

enameExtension("myfile")=null;

enameExtension("myPath/myfile")=null;

enameExtension("myfile.").equals("")=true;

enameExtension("myPath/myfile.").equals("")=true;

enameExtension("").equals("txt")=true;

enameExtension("mypath/").equals("txt")=true;

147

148//舍去⽂件名扩展名

ilenameExtension(null)=true;

ilenameExtension("").equals("")=true;

ilenameExtension("myfile").equals("myfile")=true;

ilenameExtension("mypath/myfile").equals("mypath/myfile")=true;

ilenameExtension("myfile.").equals("myfile")=true;

ilenameExtension("mypath/myfile.").equals("mypath/myfile")=true;

ilenameExtension("mypath/myfile.").equals("mypath/myfile")=true;

ilenameExtension("").equals("myfile")=true;

ilenameExtension("mypath/").equals("mypath/myfile")=true