thanks for you answer my question, but i have another question is : if my source text file are include some of URL that i don't like to got,what should i do, for example: 
<html><head><title>my page></title></head>
<body>
<table><tr><td>
<a href="http://mysite/bbsui.jsp?id=dxpwd">dxpwd</a>
</td><td>
<a href="http://mysite/bbsui.jsp?id=jimeth">jimeth</a>
</td><td>
<a href="http://mysite/bbsui.jsp?id=jone28">jone28</a>
</td><td>
<a href="http://mysite/bbsui.jsp?id=25528">25528</a>
</td></tr>
</table>
<a href="http://www.idontneed.com">i don't need this url</a>
<a href="http://www.asdf.com">i don't need this url too</a>
<a href="http://www.cnn.com"> this are also no need</a>
</body></html>

at result i just wann get the follow:

http://mysite/bbsui.jsp?id=dxpwd
http://mysite/bbsui.jsp?id=jimeth
http://mysite/bbsui.jsp?id=jone28
http://mysite/bbsui.jsp?id=25528

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In reply to Re^2: how to use regular expressions read some string from a htm file by weihe
in thread how to use regular expressions read some string from a htm file by weihe

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