javaweb方面的问题

在浏览器直接输入http://localhost:8080/PRJ_WTP_JEE_008/index.jhtml进行访问，它直接显示一个空白页面，并没有跳转这是为什么？
indexAction代码：
package campsg.qunawan.action;import java.io.IOException;
import java.util.List;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import campsg.qunawan.dao.PlaceDao;
import campsg.qunawan.dao.ThemeDao;
import campsg.qunawan.dao.TripDao;
import campsg.qunawan.dao.jdbc.PlaceDaoImpl;
import campsg.qunawan.dao.jdbc.ThemeDaoImpl;
import campsg.qunawan.dao.jdbc.TripDaoImpl;
import campsg.qunawan.entity.Trip;public class IndexAction extends HttpServlet { private static final long serialVersionUID = 1L; private TripDao tripDao = new TripDaoImpl(); private PlaceDao placeDao = new PlaceDaoImpl(); private ThemeDao themeDao = new ThemeDaoImpl();

private static int TYPE_CHINESE = 2; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
List<Trip> trips=tripDao.getPageTripsByType(TYPE_CHINESE, 0, 6);
List<String> places=placeDao.getPagePlacesByType(TYPE_CHINESE, 0, 10);
List<String> themes=themeDao.getPageThemesByType(TYPE_CHINESE, 0, 10);
request.setAttribute("trips", trips);
request.setAttribute("places", places);
request.setAttribute("themes", themes);

System.out.println("行程个数："+trips.size());
System.out.println("景点名称个数："+places.size());
System.out.println("主题名称个数："+themes.size());

request.getRequestDispatcher("/WEB-INF/pages/index.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,
IOException {
doGet(request, response);
}}web.xml代码：<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0"> <welcome-file-list>
<welcome-file></welcome-file>
</welcome-file-list> <servlet>
<servlet-name>indexAction</servlet-name>
<servlet-class>campsg.qunawan.action.IndexAction</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>indexAction</servlet-name>
<url-pattern>/index.jhtml</url-pattern>
</servlet-mapping></web-app>