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best way to remove html tags from a String in java

Posted on 2011-09-20
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Last Modified: 2012-05-12
I have a html file, which is in the form of a String. I want to strip off the html tags and extract the text to a String. I would like to do this in java. I have seen several ways of accomplishing this. I want to know the best way to do this.

TIA
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Question by:bent27
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7 Comments
 
LVL 47

Accepted Solution

by:
for_yan earned 2000 total points
ID: 36567457
        String htString = "sdfsd <html> dsfsdfjds  <jkj>  sdfsd<sdfsdf/>sdfsdfs<fsfs> ";


        String res = htString.replaceAll("<[^>]+>","");

        System.out.println(res);

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Output:

sdfsd  dsfsdfjds    sdfsdsdfsdfs 

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0
 

Author Comment

by:bent27
ID: 36567471
what about something like


String sample = "&lt;head&gt; bla bla</head>";
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LVL 47

Expert Comment

by:for_yan
ID: 36567520

but between &lt; and &gt: - it is not the tags - so we want to keep "head" in between ?

        String htString = "&lt;head&gt; bla bla</head>;";


        String res = htString.replaceAll("(<[^>]+>)|(&[^;]+;)","");


  

        System.out.println(res);

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Output:

head bla bla;

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LVL 47

Assisted Solution

by:for_yan
for_yan earned 2000 total points
ID: 36567582
You probably want it like that, because that' why they use &lt; , &gt;- to represent "<"  and ">" say in inequalities and distinguish them from  tags



        String htString = "&lt;head&gt; bla bla</head>;";


        String res = htString.replaceAll("<[^>]+>","").replace("&lt;","<").replace("&gt;",">");


       // String res1 = res.replaceAll("&[^;]+;","");

        System.out.println(res);

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Output:

<head> bla bla;

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0
 

Author Comment

by:bent27
ID: 36567606
sample input :

String htString = "&lt;head&gt; bla bla</head>;";


intended output :

bla bla

or, have you used jsoup, what is your take on it?
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LVL 47

Assisted Solution

by:for_yan
for_yan earned 2000 total points
ID: 36567682
We can do it this way if you want, but I don't think it is what you want -
if they use &lt; &gt; in the HTML code - I think they do it becuae they want to use literal ">" and "<"
instead of the tags - th's owhy I don't think you need to remove the stuff between them - is that
real snippet
"&lt;head&gt; bla bla</head>;"; ?

Woulds browser really understand this as the openeing <head> tag ?
That's wahy I thiink this &lt; should be replace by "<"
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LVL 47

Expert Comment

by:for_yan
ID: 36567840
This is how you want it below  but think about what I posted above - check it - don't know if I'm right - but that was my understanding
why people write &lt; - othewise it is easier to type "<"

        String htString = "&lt;head&gt; bla bla</head>;";




          String res = htString.replaceAll("(<[^>]+>)|(&lt;.+?&gt;)","");



        System.out.println(res);

Open in new window

Output:

 bla bla;

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0

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