asked on

Removing blink tag - regular expression and using replaceAll()

Hello!

I am trying to removes all BLINK tags from the resource to which it is applied. So, I am using replaceAll() like this, but didn’t work.

str.replaceAll("(?!)[<blink>[</blink>]]", "");

can someone help with this?

Thanks,

Mick Barry

try something like:

str.replaceAll("<blink>.*?</blink>", "");

dkim18

ASKER

No, it didn't work. when I checked the page source, it didn't remove blink tags at all.

Mick Barry

What does your source string look like exactly?

koppcha

str.replaceAll("(<blank>|</blank>)","")

koppcha

Oops i considered it as <blank> instead of <blink> change accordingly..

Mick Barry

Did you also want to remove everything wrapped by the blink tag?

dkim18

ASKER

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
This is the source and I want to remove all blink tags.

<HEAD>
<TITLE> blink page-HW#10</TITLE>

</HEAD>

<BODY>
<CENTER>
<H1><BLINK> BLINK </BLINK></H1><BR>
<H1><blink> BLINK </blink></H1><BR>

<H1><BlInK> BLINK </BlInK></H1>

</CENTER>
</BODY>
</HTML>

koppcha

mine will work

koppcha

String name="<H1><BLINK> BLINK </BLINK></H1><BR>";
String raj=name.replaceAll("(<BLINK>|</BLINK>)","");
System.out.println(raj);

output will be
<H1> BLINK </H1><BR>

Is this what you are expecting?

dkim18

ASKER

This didn't work at all...
that is strange...

str.replaceAll("(<blink>|</blink>)", "");

I also think I need to prepend the first argument with "(?!)" for a case-insensitive replacement.

Mick Barry

try:

str.replaceAll("<[bB][lL][iI][nN][kK]>.*?</[bB][lL][iI][nN][kK]>", "");

koppcha

str.replaceAll("(<[bB][lL][iI][nN][kK]>|</[bB][lL][iI][nN][kK]>)","");

this wont strip the content between the tags ...hoping that is what you are looking for

dkim18

ASKER

This is strange. The out of the following is exactly above source and if I put str.replaceAll("(<blink>|</blink>)", "");
it doesn't work. If I tested this,

String name="<H1><BLINK> BLINK </BLINK></H1><BR>";
String raj=name.replaceAll("(<BLINK>|</BLINK>)","");
System.out.println(raj);

Yes, it worked! So, why this isn't working...??
+++++++++++++++++++++++++++++++++

public void doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain)
throws ServletException, IOException {
HttpServletRequest req = (HttpServletRequest)request;
HttpServletResponse res = (HttpServletResponse)response;

CharArrayWrapper responseWrapper =
new CharArrayWrapper(res);
chain.doFilter(req,responseWrapper);

String str = responseWrapper.toString();
// str.replaceAll("(<blink>|</blink>)", "");
System.out.println(str);

aozarov

The line is commented...

BTW, if you want to ignore case then you can do it using this way:
Pattern p = Pattern.compile("<blink>|</blink>", Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(responseWrapper.toString());
String str = m.replaceAll("');
System.out.println(str);

ASKER CERTIFIED SOLUTION

Mick Barry

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