java中的转义序列
我需要对来自 rss feed 的字符串使用正则表达式。它是下面的字符串。
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>]]>";
正如你所看到的，字符串中有 " ，所以我不能将它用作语句。我尝试使用原始字符串，但正如你所知，这在 java 中是不可能的。
如何从上面的语句中提取 img 标签。我需要
以编程方式完成此操作，谢谢！
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!
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（一般来说）使用正则表达式来解析 XML/HTML 是非常非常困难的，还有另一个 这篇文章列出了优秀的 Java XML 解析器及其优点，我建议您使用其中之一。
It's very, very difficult (in general) to use regular expressions to parse XML/HTML, there is another post which lists good XML parsers for Java and their strengths, I suggest you use one of these.
如果你想在java中的字符串文字中使用
"你必须像这样用反斜杠转义它们If you wnat to use
"in String literal in java you have to escape them with backslash like that在字符串中使用 \" 即可使用其中的 "。例如：
这适用于其他一些特殊字符，例如反斜杠本身：
您可以解析 RSS-FEED 来查找此类特殊字符。就像这个问题一样：
JAVA：检查字符串是否存在其中的特殊字符
并将其格式化为有效的字符串字符。
Use \" in a string to use the " inside it. For example:
This works for some other special character like the backslash itself:
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.