CDI - Java EE Servlet saving variables to a managed bean
Question
I have a Java EE class that currently reads info from a form and prints it out.
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Response extends HttpServlet
{
String date = "0";
public void init() throws ServletException
{
//Get Election Date from xml
String initial = getInitParameter("electionDate");
date = initial;
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException
{
//Get values from form
PrintWriter out = response.getWriter();
String firstName=request.getParameter("firstname");
String lastName=request.getParameter("lastname");
String address=request.getParameter("address");
String city=request.getParameter("city");
String state=request.getParameter("state");
String zip=request.getParameter("zip");
String phone = request.getParameter("phone");
String affil=request.getParameter("affil");
//Print Summary of Voter Registration
out.println("<html>");
out.println("<head><title>Registration Summary</title></head>");
out.println("<body>");
out.println("<p>Registration Summmary</p>");
out.println("<p>First Name: " + firstName + "</p>");
out.println("<p>Last Name: " + lastName + "</p>");
out.println("<p>Address : " + address + "</p>");
out.println("<p>City : " + city + "</p>");
out.println("<p>State : " + state + "</p>");
out.println("<p>Zip: " + zip + "</p>");
out.println("<p>Phone Number: " + phone + "</p>");
out.println("<p>Affiliation: " + affil + "</p>");
out.println("<p>Next Election Date: " + date + "</p></p>");
out.println("<p>Is the above information correct?</p>");
out.println("<button>Yes</button>");
out.println("<button>No</button>");
out.println("</body></html>");
out.close();
}
}
I want to get the values (firstName, lastName, etc.) from this Java servlet and inject to a bean.
Then when this file calls another servlet I want the values from the bean to be available in that servlet.
I just want to know how to store the variables I created above into a managed bean and then have the other servlet reference and retrieve the variables in that bean.
I have beans.xml, web.xml, pom.xml (I'm using Maven) files set up already.
1 answers
solution1
0 2014-06-04 15:24:57
You cannot simply inject Strings, so you will have to use a qualifier (the simplest one is @Named, see if that is sufficient).
In your servlet, say
@Produces
@Named("foo")
String lastName;
...
void doPost() {
lastName = getParameter(...);
}
and in the target bean, use
@Inject
@Named("foo")
String lastName;
Since you are in a Request-Scope, keep in mind that injecting request-scoped values into longer living instances (EJBs for example) might lead to unpredictable behavior. I seriously doubt that your approach will make you happy. Perhaps you could tell us more about what you are trying to do?
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