Question

How can I send my response and request object from a jsp file to a servlet by code? I don’t want to submit a form or so.

I tried it with:

response.setRedirect("my page"):

But then it says:

Exception in thread "main" org.apache.http.client.HttpResponseException: Moved Temporarily
    at org.apache.http.impl.client.BasicResponseHandler.handleResponse(BasicResponseHandler.java:68)
    at org.apache.http.impl.client.BasicResponseHandler.handleResponse(BasicResponseHandler.java:54)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:945)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:919)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:910)
    at com.xx.xx.client.Client.sendPOSTRequest(Client.java:185)
    at com.xx.xx.client.Client.main(Client.java:46)

As clarification: I have a client that sends a post request to a JSP file. This JSP file parses a file and puts the needed information into the session. I want to call a servlet from this jsp file to add something into the database. I think this error code is thrown by this line String responseBody = httpclient.execute(httppost, responseHandler);

Answer 1

you can use the RequestDispatcher forward(ServletRequest request, ServletResponse response)

Forwards a request from a servlet to another resource (servlet, JSP file, or HTML file) on the server.

You can do it like this:

ServletContext context= getServletContext();
RequestDispatcher rd= context.getRequestDispatcher("/YourServlet");
rd.forward(request, response);

UPDATE

Also note on your code that you have response.setRedirect instead of response.sendRedirect(...) but note that this method will not work as you want it to because it just asks the browser to make a new request to your servlet rather than forward your request and response object to that servlet . See RequestDispatcher.forward() vs HttpServletResponse.sendRedirect() for more info