JSP editor for eclipse, does it exist?
The JavaEE version of Eclipse has full JSP support. The standard java development version doesn't.
Alternatively, you should be able to install the WebTools plugin(s) into an existing Eclipse, that should give you JSP support also.
I had this same problem!
I resolved it by switching my eclipse perspective to JAVA EE perspective.
Go to help -> Install New Software and install webtool.
And for whomever that still not seeing the editor, set JSP editor to be the default editor for JSP files in this way