Java中的转义序列

Question

I need to use regular expression with a string from a rss feed. It is following string.

private String text = "<![CDATA[<table border="0" cellspacing="0" cellpadding="6px">   <tr><td valign="top" align="center" width="150px"><a href="http://entertainment.desktopnexus.com/wallpaper/978620/"><img src="http://static.desktopnexus.com/thumbnails/978620-thumbnail.jpg" border="1" style="border: 1px solid #000000;"></a><br><strong>Princess,Aurora,Sleeping,Beauty</strong></td><td valign="top" style="font-size: 10pt;">A new wallpaper has been posted to the <a href="http://entertainment.desktopnexus.com">Entertainment</a> gallery on <a href="http://www.desktopnexus.com">Desktop Nexus</a>.<br><br>Uploaded By: <a href="http://my.desktopnexus.com/Jessowey/">Jessowey</a><br>Category: <a href="http://entertainment.desktopnexus.com/cat/movies/">Movies</a><br>Date Uploaded: 02/23/12<br>Native Resolution: 1024x768<br>Points: +1<br>Download Count: 0<br><br><b><a href="http://entertainment.desktopnexus.com/wallpaper/978620/">View This Wallpaper Now</a></b></td></tr></table>]]>";

As you can see there are " inside the string, so I can't use it as a statement. I tried to use raw string but as you know it is not possible in java.

How can I extract img tag from the above statement. I need to do it programatically.

Thanks in advance!

Answer 1

通常，使用正则表达式解析XML / HTML非常非常困难，还有另一篇文章列出了适用于Java的优秀XML解析器及其优势，我建议您使用其中之一。

Answer 2

Use \\" in a string to use the " inside it. For example:

String yourFeed = "My so \"called\" String";

This works for some other special character like the backslash itself:

String antoherFeed = "Hello \"World\", what a nice \\ day \\ ";

You can parse your RSS-FEED for such special characters. Like in this question: JAVA: check a string if there is a special character in it

and format them to valid string characters.

Answer 3

如果您要在Java的String文字中使用" ，则必须使用反斜杠将其转义，例如

String stringWithParenthesis = "text \"in parenthesis\" out ";