org.apache.commons.lang.StringUtils中提供许多有用的字符串操作方法，了解这些方法，我们可以避免许多不必要的重复工作。下面介绍其中比较有用的几个方法：
检查空字符串：
StringUtils.isBlank(String str);StringUtils.isNotBlank(String str);
缩写字符串：
String test = " This is a test of the abbreviation. "
System.out.println( StringUtils.abbreviate( test,
10
) );[Console输出]This is
查找嵌套字符串：
String htmlContent = " <html>/n " +
" <head>/n " +
" <title>Test Page</title>/n " +
" </head>/n " +
" <body>/n " +
" <p>This is a TEST!</p>/n " +
" </body>/n " +
" </html> "
; // Extract the title from this XHTML content
String title = StringUtils.substringBetween(htmlContent, " <title> " , " </title> "
);System.out.println( " Title: " +
title );[Console输出]Title: Test Page
验证字符串：
String test1 = " ORANGE "
;String test2 = " ICE9 "
;String test3 = " ICE CREAM "
;String test4 = " 820B Judson Avenue "
; boolean t1val = StringUtils.isAlpha( test1 ); // returns true
boolean t2val = StringUtils.isAlphanumeric( test2 ); // returns true
boolean t3val = StringUtils.isAlphaSpace( test3 ); // returns true
boolean t4val =
StringUtils.isAlphanumericSpace( test4 ); // returns true
计算字符串出现频率：
File manuscriptFile = new File( " manuscript.txt "
);Reader reader = new
FileReader( manuscriptFile );StringWriter stringWriter = new
StringWriter( );
while ( reader.ready( ) ) { writer.write( reader.read( ) ); }
String manuscript
=
stringWriter.toString( ); // Convert string to lowercase
manuscript
=
StringUtils.lowerCase(manuscript); // count the occurrences of "futility"
int numFutility = StringUtils.countMatches( manuscript, " futility "
);
比较不同字符串：
int dist = StringUtils.getLevenshteinDistance( " Word " , " World "
);String diff = StringUtils.difference( " Word " , " World "
); int index = StringUtils.indexOfDifference( " Word " , " World "
);System.out.println( " Edit Distance: " +
dist );System.out.println( " Difference: " +
diff );System.out.println( " Diff Index: " +
index );[Console输出]Edit Distance: 2
Difference: ldDiff Index:
3
扫一扫
217
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
