为什么不执行doget
package com.michael.servlet;
import 
java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.servlet.*;
import javax.servlet.http.*;
public class ServletBasic extends HttpServlet {
   //  private static final String CONTENT_TYPE = "text/html; charset=GBK";
   /*  public void init(ServletConfig config) throws 
ServletException {
         super.init(config);
     }
*/
     public ServletBasic() {
         super();
         System.out.println("----ServletBasic-----");
     }
     public void destroy() {
         super.destroy();
         System.out.println("----destroy-----");
     }
     public void doGet(HttpServletRequest request,  
                       HttpServletResponse response) throws ServletException,                                                              
IOException {
        // System.out.println("----doget-----");                                                    
         String username = request.getParameter("username");
         String password = request.getParameter("password");
         System.out.println("username=" + username);
         if (username != null && username.equals("redking")) {
             request.getRequestDispatcher("/successful.html").forward(request,  
                                                                      response);
         } else {
             request.getRequestDispatcher("/failure.html").forward(request,  
                                                                   response);
         }
         /*  System.out.println("----doget-----");
         response.setContentType("text/html");
         PrintWriter out = response.getWriter();
         out.println("<html>");
         out.println("<head><title>A Servlet</title></head>");
         out.println("<body>");
         out.println("     this is");
         out.println(this.getClass());
         out.println(",using the GET method");
         out.println("<p>The servlet has received a GET. This is the reply.</p>");
         out.println("<p>welcom to amaker!.</p>");
         out.println("</body></html>");
         out.close();*/
     }
     public void doPost(HttpServletRequest request,  
                        HttpServletResponse response) throws ServletException,  
                                                             IOException {
         System.out.println("----dopost-----");
         response.setContentType("text/html");
         PrintWriter out = response.getWriter();
         out.println("<html>");
         out.println("<head><title>A Servlet</title></head>");
         out.println("<body>");
         out.println("     this is");
         out.println(this.getClass());
         out.println(",using the POST method");
         out.println("<p>The servlet has received a POST. This is the reply.</p>");
         out.println("</body></html>");
         out.close();
     }
     public void init() throws ServletException {
         //第一种方法