java - Replace a substring with another string in dynamic content -


i want remove particular text html content. using replaceall method in java replace content "" achieve that.

my content 

<html xmlns="http://www.w3.org/1999/xhtml" lang="fr-ca" xml:lang="fr-ca"> or  <html xmlns="http://www.w3.org/1999/xhtml" lang="en-au" xml:lang="en-au"> or <html xmlns="http://www.w3.org/1999/xhtml" lang="en-gb" xml:lang="en-gb"> or <html xmlns="http://www.w3.org/1999/xhtml" lang="en-ie" xml:lang="en-ie"> or <html xmlns="http://www.w3.org/1999/xhtml" lang="es-pr" xml:lang="es-pr> or <html xmlns="http://www.w3.org/1999/xhtml" lang="en-us" xml:lang="en-us">

i want remove lang="-" xml:lang="-" can see, value of lang , xml:lang changing dynamically. want regular expression can detect particular string sequence replace "" using replaceall(regex, string) method in java.

this answer based on assumption that

<html xmlns="http://www.w3.org/1999/xhtml" lang="fr-ca" xml:lang="fr-ca"> or  <html xmlns="http://www.w3.org/1999/xhtml" lang="en-au" xml:lang="en-au"> or ...

means have html structures 

<html xmlns="http://www.w3.org/1999/xhtml" lang="fr-ca" xml:lang="fr-ca">    ... </html>

or

<html xmlns="http://www.w3.org/1999/xhtml" lang="en-au" xml:lang="en-au">    ... </html>

in case instead of regex use html/xml parser jsoup. code like

string htmltext =          "<html xmlns=\"http://www.w3.org/1999/xhtml\" lang=\"fr-ca\" xml:lang=\"fr-ca\">" +         "   <body>hello</body>" +         "</html>";  //use xml parser if don't want jsoup change optimize html code document doc = jsoup.parse(htmltext,"",parser.xmlparser()); elements htmltag = doc.select("html"); htmltag.removeattr("lang").removeattr("xml:lang");//remove these attributes selected tag  string replaced = doc.tostring(); system.out.println(replaced);

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