Java (JSP/Servlet): equivalent of getServletContext() from inside a .jsp

Question

How should I access the ServletContext from a .jsp? For example, how can I call the getRealPath method from inside a .jsp.

Here's a Servlet, which works fine:

protected void doGet(
            HttpServletRequest req,
            HttpServletResponse resp
    ) throws ServletException, IOException {
        resp.setContentType( "text/html; charset=UTF-8" );
        final PrintWriter pw = resp.getWriter();
        pw.print( "<html><body>" );
        pw.print( getServletContext().getRealPath( "text/en" ) );
        pw.print( "</body></html>" );
        pw.flush();
        pw.close();
    }

Now I'm looking for the exact line I'm supposed to insert in the following .jsp to do exactly the same thing as the servlet above is doing.

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <body>
     ...  // What should I insert here   
  </body>
</html>

See also http://stackoverflow.com/questions/2964250/jsp-getservletcontext-error — Vadzim, Jan 25 '17 at 15:32

score 14 · Accepted Answer · answered May 24 '10 at 16:18

The ServletContext is accessible via the application implicit object.

Since each JSP is a servlet, you can also use getServletContext().

But.. avoid having code like that in the JSP. Instead, obtain the value you need in your servlet and set it as a request attribute, simply reading it in the JSP (via JSTL preferably)

score 11 · Answer 2 · answered May 24 '10 at 16:13

11

Try this:

${pageContext.servletContext}

answered May 24 '10 at 16:13

Roman

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From the question: *"For example, how can I can call the getRealPath() method from inside a .jsp"*? – SyntaxT3rr0r May 24 '10 at 16:18
1

@Webinator: that method requires a String parameter so you cannot call it through `${}` notation. There are at least 3 different approaches exist: 1)You can call this method inside a bean (the best for the case IMHO) 2) You can create a custom tag and call it from there 3) You can write a scriplet (`<% //some code here %>`) - the worst IMHO. – Roman May 24 '10 at 16:23

score 3 · Answer 3 · edited Oct 30 '14 at 17:15

3

Simply use application.getRealPath(" ");.

edited Oct 30 '14 at 17:15

peterh

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answered Dec 06 '12 at 13:48

Mahmoud Abou-Eita

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score 3 · Answer 4 · answered May 24 '10 at 16:16

3

I think this should work fine on a JSP Page:

<body>
<%
out.print(getServletContext().getAttribute("attribute"));
%>
</body>

answered May 24 '10 at 16:16

Mr.Expert

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score 2 · Answer 5 · answered May 24 '10 at 16:23

2

if you're looking to use the getRealPath() method, you might consider looking into a jstl tag called 'c:url'

<c:url value="text/en" />

answered May 24 '10 at 16:23

chris

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Java (JSP/Servlet): equivalent of getServletContext() from inside a .jsp

5 Answers5

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