Latex references the same footnote in multiple places __latex

If there are several footnotes in the article that need to add the same content, each writing \footnote{*}, there will be several overlapping footnotes. This problem can be solved by "tag reference" + "superscript".
For example, we're going to add the same footnote to both ORL and Jaffe, so you can:

Orl\footnote{http://blog.csdn.net/bear\_kai\label{web}} and
Jaffe\textsuperscript{\ref {web}}.

Note that when an underscore is in the URL, the amount is required in the latex and a backslash is the "escape character". The display effect is as follows: