How to call a servlet on jsp page load? [duplicate]

Answer 1

You should do it the other way round. Call the servlet by its URL and let it present the JSP. That's also the normal MVC approach (servlet is the controller and JSP is the view).

First put the JSP file in /WEB-INF folder so that the enduser can never "accidently" open it by directly entering its URL in browser address bar without invoking the servlet. Then change the servlet's doGet() accordingly that it forwards the request to the JSP.

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // ...

    request.getRequestDispatcher("/WEB-INF/hello.jsp").forward(request, response);
}

Open it by

http://localhost:8080/contextname/HelloServlet

Note that you can of course change the URL pattern in servlet mapping to something like /hello so that you can use a more representative URL:

http://localhost:8080/contextname/hello

See also:

• Our Servlets tag info page

Answer 2

Call a servlet instead get result in request attribute and forward the request to jsp

or make an ajax call to servlet on load and render the response using javascript

Answer 3

<jsp:include page="/HelloWorld"/>

Answer 4

In JSP paage you can forward the request to the Servlet

response.sendRedirect(request.getContextPath()+"/SomeServlet");