jsp - Get URL of page requested that caused a 404 -

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how url of page requested caused 404 error?

for example, type go http://example.com/path/does/not/exist/index.jsp have custom 404 page how go retrieving url mentioned above can display message similar "the url http://example.com/path/does/not/exist/index.jsp not exist"?

if forward used go error page, can obtain original request url 

request.getattribute("javax.servlet.forward.request_uri")

or el

${requestscope['javax.servlet.forward.request_uri']}

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