Eclipse shortcut for commenting jsp, xml code

I found Ctrl + Shift + C works in JSP too, it works like:

<tiles:insertDefinition name="" >
</tiles:insertDefinition>

<!--<tiles:insertDefinition name="" >-->
<!--</tiles:insertDefinition>-->

add comment tag line by line, and select the sentences, use Ctrl + Shift + C again can toggle remove the comments.

Ctrl + Shift + / add block comment in JSP, works like:

<tiles:insertDefinition name="" >
</tiles:insertDefinition>

<!--<tiles:insertDefinition name="" >
    </tiles:insertDefinition>                       
-->

can use Ctrl + Shift + \ to remove the block comment.

PS: I want to find out, which eclipse shortcut can add/remove <%-- --%> comment in JSP?

I believe CTRL+SHIFT+C works in XML, not sure about JSP. I think it lacks consistency in the various editors, and some don't have this shortcut.

I use Shift+Ctrl+/ to Add Block Comment in both XML and JSP files (works at the line level or for a selected block).

Just in case, if you are looking for a particular shortcut, you can use Shift+Ctrl+L to Show Key Assist (i.e. the Commands and their Bindings).

In eclipse they use same kind of shortcut to do this which is for:

I found Ctrl + Shift + C works in XML and JSP.

Single line

comment Ctrl + /

uncomment Ctrl + /

Multiline

comment Ctrl + Shift + /

uncomment Ctrl + Shift + \ (note the backslash)

Hope this helps!