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POHelp extracting text from html tag with Java and Regex
 

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  1. POHelp extracting text from html tag with Java and Regex
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    <p>I would like to extract some text from an html file using Regex. I am learning regex and I still have trouble understanding it all. I have a code which extracts all the text included betweeen <code>&lt;body&gt;</code> and <code>&lt;/body&gt;</code> here it is:</p> <pre><code>public class Harn2 { public static void main(String[] args) throws IOException{ String toMatch=readFile(); //Pattern pattern=Pattern.compile(".*?&lt;body.*?&gt;(.*?)&lt;/body&gt;.*?"); this one works fine Pattern pattern=Pattern.compile(".*?&lt;table class=\"claroTable\".*?&gt;(.*?)&lt;/table&gt;.*?"); //I want this one to work Matcher matcher=pattern.matcher(toMatch); if(matcher.matches()) { System.out.println(matcher.group(1)); } } private static String readFile() { try{ // Open the file that is the first // command line parameter FileInputStream fstream = new FileInputStream("user.html"); // Get the object of DataInputStream DataInputStream in = new DataInputStream(fstream); BufferedReader br = new BufferedReader(new InputStreamReader(in)); String strLine = null; //Read File Line By Line while (br.readLine() != null) { // Print the content on the console //System.out.println (strLine); strLine+=br.readLine(); } //Close the input stream in.close(); return strLine; }catch (Exception e){//Catch exception if any System.err.println("Error: " + e.getMessage()); return ""; } } } </code></pre> <p>Well it works fine like this but now I would like to extract the text between the tag: <code>&lt;table class="claroTable"&gt;</code> and <code>&lt;/table&gt;</code></p> <p>So I replace my regex string by <code>".*?&lt;table class=\"claroTable\".*?&gt;(.*?)&lt;/table&gt;.*?"</code> I have also tried <code>".*?&lt;table class=\"claroTable\"&gt;(.*?)&lt;/table&gt;.*?"</code> but it doesn't work and I don't understand why. There is only one table in the html file but there is an occurence of "table" in a javascript code : "...dataTables.js..." could that be the reason for the mistake?</p> <p>Thank you in advance for helping me,</p> <p>EDIT: the html text to extranct is something like:</p> <pre><code>&lt;body&gt; ..... &lt;table class="claroTable"&gt; &lt;td&gt;&lt;th&gt;some data and manya many tags &lt;/td&gt; ..... &lt;/table&gt; </code></pre> <p>What I would like to extract is anything between <code>&lt;table class="claroTable"&gt;</code> and <code>&lt;/table&gt;</code> </p>
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    1. USvallllll
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    1. COIf you want to extract data from html: use an html parser. If you want to learn RegExp: do **not** use html or xml input. Sooner or later you'll realize, that regexp'ing html doesn't work.
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      1. POHelp extracting text from html tag with Java and Regex
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    2. COhttp://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454
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      1. USNimChimpsky
    3. CO@NimChimpsky i had a feeling someone would post that lol.
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      1. USMatt
 

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