问题
I have a string which might include br or span.../span tags or other HTML characters/entities. I want a robust way of stripping all that and getting the remaining UTF-8 characters. This be should be cross-platform, ideally.
Something like this would be ideal:
http://snipplr.com/view/15261/python-decode-and-strip-html-entites-to-unicode/
but that also removes the tags.
回答1:
Just how stringent are your requirements? A simple two-state FSA ought to do. Start in the READCHAR state. Whenever you read a '<' in that state, transition to the READTAG state; otherwise, write the character to your result string. Whenever you're in the READTAG state and read a '>', transition back to the READCHAR state.
Edit: Oops. Missed the part of about entities. You'll nead a READENTITY state for that too. When you transition out of it, you could also convert the code into the corresponding UTF-8 character.
回答2:
I'm not clear on what you want.
Input:
This is a string
of text & on many lines "
Should this output:
1) This is a string <br> <br /> of text & on many lines " (Replace & with & and " with ")
2) This is a string of text & on many lines "
回答3:
Do you want to simply delete the elements, or to convert HTML to plain text?
Option 1:
If you just want to delete all occurances of and you can use a regex search and replace.
Option 2:
If what you're really trying to do is take a page that has formatting and convert it to plain text, the simplest and most robust way I can think of is to use a browser, or some browser engine, to actually parse the HTML and extract the text from it.
IOW, this is equivalent to copying a web page from the browser into the clipboard and then pasting it into notepad.
来源：https://stackoverflow.com/questions/979071/c-remove-all-html-formatting-from-string