java - 无法从 servlet 重定向到 jsp 页面

Question

我正在尝试使用 jsp 和 servlet 创建一个小型注册表单。
这个概念是这样的:
在 jsp 表单中输入的数据将由 servlet 程序检查是否重复。
如果存在重复，则控件必须返回到调用 servlet 的注册 (jsp) 页面。
我在 eclipse helios 中这样做。
servlet程序在java资源下默认包下，
jsp 文件在 web content 文件夹下。

我的问题是
我能够从 jsp 重定向到 servlet；

但是当我尝试从 servlet 返回到 jsp 页面时，
tomcat 服务器显示如下错误:

HTTP Status 404 - /RservletEs/registeration.jsp

type Status report

message /RservletEs/reg.jsp

description The requested resource is not available.

我试过 request.dispatcher() 和 response.sendRedirect() 都显示相同的错误。

文件路径为:

RservletEs/src/ServletCheck
Rservlets/Web Content/registeration.jsp

我附上了下面的源代码 有人请帮我解决这个问题

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

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.collect.ImmutableMap;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHitField;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequestBuilder;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.SearchType;

import java.util.Map;
import com.google.gson.Gson;
/**
 * Servlet implementation class ServletCheck
*/
@WebServlet("/ServletCheck")
public class ServletCheck extends HttpServlet {
private static final long serialVersionUID = 1L;

 /**
  * @see HttpServlet#HttpServlet()
  * /
 public ServletCheck() {
    super();
    // TODO Auto-generated constructor stub
  }

  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
    */
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    String clusterName="asdf";
    String hostName="localcost";
    String index="testdb";
    String type="emp_type";
    String field="emailId";
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();



    int portNumber=26101;

    final TransportClient client = new TransportClient(ImmutableSettings.settingsBuilder().put("cluster.name", clusterName)
            .put("client.transport.sniff", true).build());

    Settings settings = client.settings();

    out.println("**settings:"+ settings);

    ImmutableMap<String, String> map = settings.getAsMap();

    out.println("**map::"+ map);

    ((TransportClient) client).addTransportAddress(new InetSocketTransportAddress(hostName, portNumber));

    out.println("ES client:" + client);
    String firstName=request.getParameter("firstName");
    String lastName=request.getParameter("lastName");
    String emailId=request.getParameter("emailId");
    String age=request.getParameter("age");
    String dob=request.getParameter("dob");
    String eId=request.getParameter("employeeId");

    String value=emailId;


    SearchResponse response2 = client.prepareSearch(index)
   .setTypes(type)
   .setSearchType(SearchType.QUERY_AND_FETCH)
   .setQuery(QueryBuilders.termQuery(field, value))
   .setFrom(0).setSize(60).setExplain(true).setRouting("1")
   .execute()
   .actionGet();

    SearchHit[] results = response2.getHits().getHits();
    int length=results.length;
    int i=0;

    if (length>0){
            response.sendRedirect(request.getContextPath()+"/registeration.jsp");
        //request.getRequestDispatcher("/registeration.jsp").forward(request, response);
        }
        else{

            out.println("setting the values");

            hr_employee tweet = new hr_employee();

            out.println("setting the id");

            tweet.setEmployeeId(eId);

            tweet.setFirstName(firstName);
            out.println("setting the last name");
            tweet.setLastName(lastName);
            tweet.setEmailId(emailId);
            tweet.setDob(dob);



            String str=tweet.getEmployeeId();
           /* System.out.println("the id is...."+str);
            System.out.println("the firstname .... "+tweet.getFirstName());
            System.out.println("teh last name....."+tweet.getLastName());
           */

        out.println("initiallizing req builder");           
        final IndexRequestBuilder builder = client.prepareIndex(index, type,str);

        out.println("setting source");
        builder.setSource(new Gson().toJson(tweet));
        out.println("getting response");
        final IndexResponse response3 = builder.setRouting("1").execute().actionGet();

         out.println("geting connected...");

        out.println("ElasticSearchEJBBean:indexDocument:" + index+ ":" + type+ ":" + str + ":index results:" + response3);
        response.sendRedirect(request.getContextPath()+"/ServletInsert");
        }






    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
                  // TODO Auto-generated method stub



      doGet(request,response);



    }

 }

Answer 1

听起来你的命名方式肯定有问题。
像这样尝试:

right click on ur jsp file and select copy qualified name .  

然后像这样使用该名称进行重定向或分派(dispatch):

request.getRequestDispatcher("/registeration .jsp").forward(request,response);