It is considered a best practice to "hide" JSP files from the user, meaning never show a URL that directly references a JSP file. In fact it is a good idea to add a secuirty constraint to the web.xml file such that it isn't even possible to access a JSP file directly.
There are a number of reasons for this. One is that you don't want a potential hacker to know the file structure of your website. Another is that even though you currently have no processing that has to occur before the login.jsp page is displayed, you may want to add some later. If the user has bookmarked the JSP page, the link will fail.