Usar expresiones regulares en Java


	Usar expresiones regulares en Java

ubuntulife

8-2-2007 2:50 AM

370 views

tags:

programacion, java

ubuntulife says:

Un pequeño tuto de como construir expresiones regulares en Java. De interes.

Add a Comment

Login to Comment. Not a member yet? Sign up

Today's Top Clips

visit the Top Clips page

View the Top Clips from August 2, 2007

Embed This Clip In Your Site...

<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/1a4cd732-a9ea-4d24-9f55-e0d17711e041/C7C6D7F5-B081-4745-ADBD-0338CB8919A2/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/" href="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/" style="font-size: 11px;">xiaoxing.wordpress.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/"><FONT size="4">detect if a String is like an E-Mail address:</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/"><FONT color="#8080ff">public boolean isEmailAddr(String str) {<BR />    Pattern email = Pattern.compile(”<FONT size="4">^\\S+@\\S+$</FONT>“);<BR />    Matcher fit = email.matcher(str);<BR />    return fit.matches();<BR />}</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/"><FONT size="4" color="#000000">There are four diffrent types of elements in reg-ex:</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/"><P>–  Assertions ( “Starts With” and “Ends With”)<BR />–  Literal characters ( “Literally an @”)<BR />–  Any character from a group ( “a non-space character”)<BR />–  Counts (1 or more of those)</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/"><FONT size="4"><FONT color="#0000ff">^</FONT>    starts with<BR /><FONT color="#0000ff">\S</FONT>    a non-space character<BR /><FONT color="#0000ff">+</FONT>    one or more of the one before<BR /><FONT color="#0000ff">@</FONT>    literal value<BR /><FONT color="#0000ff">$</FONT>    end of string</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/"><FONT size="4">so, the reg-ex is: <FONT color="#0000ff">^\S+@\S+$</FONT></FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/"><FONT size="4">and, in order to compile this reg-ex, we need to escape <FONT color="#0000ff">\</FONT>, so we need another <FONT color="#0000ff">\</FONT></FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/"><P>Finally we get:</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://xiaoxing.wordpress.com/2007/07/30/use-regular-expressions-in-java/"><FONT size="5" color="#0000ff">^\\S+@\\S+$</FONT></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/C7C6D7F5-B081-4745-ADBD-0338CB8919A2/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

New from the makers of Clipmarks: Amplify.com - Don't just share the news...Amplify it!

Clipmarks: Home; New Clips; Top Clips; Dashboard

Popular Topics: News; Life; Science; Technology; Entertainment

Get Started: Sign Up; Install Clipping Tool; How Clipping Works; Clip-to-Blog™; ClipSearch

Tools and Resources: FAQ; ClipWeek; Top Clippers; Top Tags; Site Map

About Clipmarks: About Us; Contact; Copyright; Privacy; EULA

Search Options

Today's Top Clips