This is how to create xml in servlet:

package phoneBook;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CreateXML extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, 
        HttpServletResponse response) 
        throws ServletException, IOException {
        
        PrintWriter out = response.getWriter();
        response.setContentType("text/xml; charset=UTF-8");
        
        out.println("<entry>");
        out.println("<name>jr galia</name>");
        out.println("<address>Palo Leyte</address>");
        out.println("</entry>");
    }
}

output: