我有一个Web应用程序，在获取所有用户信息后，它会将该信息发送到另一个页面并显示它。就这些。问题是我需要从选择列表中获取值。如何在其他页面上执行此操作，当我单击提交时，它会在下面给出错误。
message / Justin_EJ_Assignment03_15400579 / customerServlet /
描述：请求的资源不可用
我在哪里错了？试图获得令人沮丧 这工作....
以下是我的3个课程：
//This class stores all of the neccessary phonetypes to be added to the select list in the form.
package edu.witc.Assignment03.model;
import java.util.ArrayList;
import java.util.Collection;
public class Phone {
private String phoneName = "";
private Collection<Phone> phoneTypeCollection = null;
public Phone(){
phoneTypeCollection = new ArrayList<>();
phoneTypeCollection.add(new Phone("Home"));
phoneTypeCollection.add(new Phone("Mobile"));
phoneTypeCollection.add(new Phone("Work"));
}
public Phone(String phoneName){
this.phoneName = phoneName;
}
public String getPhoneName(){
return phoneName;
}
public Collection<Phone>getPhoneCollection(){
return phoneTypeCollection;
}
}
package edu.witc.Assignment03.controller;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.servlet.*;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import edu.witc.Assignment03.model.Customer;
import edu.witc.Assignment03.model.Phone;
import edu.witc.Assignment03.model.States;
@WebServlet(description = "servlet to get act as controller between form and models", urlPatterns = { "/customerServlet" })
public class CustomerServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public CustomerServlet() {
super();
}
private void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
HttpSession session = request.getSession();
//create the JavaStudents object
Phone phone = new Phone();
//declare the student collection
Collection<Phone> phones = phone.getPhoneCollection();
//flesh out the collection from the arraylist
//students = new JavaStudents().getStudents();
//System.out.println("hey " + students.size());
//store the JavaStudents object in the session
//if(session != null){
session.setAttribute("phones", phones);
request.getRequestDispatcher("/customerManagement.jsp").forward(request, response);
//}
}
private edu.witc.Assignment03.model.States states = new States();
private List<edu.witc.Assignment03.model.Customer> customers = new ArrayList<Customer>();
private void addCustomer(HttpServletResponse response, HttpServletRequest request)//redirect to index
throws IOException, ServletException {
String url = "/pets.jsp";
request.setAttribute("customers", customers);
request.getRequestDispatcher(url).forward(request, response);
}
private void editCustomer(HttpServletResponse response, HttpServletRequest request)//redirect to index
throws IOException, ServletException {
String url = "/customerManagement.jsp";
request.setAttribute("customers", customers);
request.getRequestDispatcher(url).forward(request, response);
}
private void sendCustomerList(HttpServletResponse response, HttpServletRequest request)//redirect to index
throws IOException, ServletException {
String url = "/index.jsp";
request.setAttribute("customers", customers);
request.getRequestDispatcher(url).forward(request, response);
}
private Customer getCustomer(int customerId) {
for (Customer customer : customers) {
if (customer.getCustomerId() == customerId) {
return customer;
}
}
return null;
}
private void sendEditCustomerForm(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
String url = "/customerManagement.jsp";
request.setAttribute("customers", customers);
request.getRequestDispatcher(url).forward(request, response);
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
// update customer
int customerId = 0;
try {
customerId =
Integer.parseInt(request.getParameter("id"));
} catch (NumberFormatException e) {}
Customer customer = getCustomer(customerId);
if (customer != null) {
customer.setFirstName(request.getParameter("firstName"));
customer.setLastName(request.getParameter("lastName"));
customer.setEmail(request.getParameter("email"));
customer.setPhone(request.getParameter("phone"));
customer.setAddress(request.getParameter("address"));
customer.setCity(request.getParameter("city"));
request.setAttribute("states", states);
customer.setZip(request.getParameter("zip"));
}
addCustomer(response, request);
}
}
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="java.util.ArrayList" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Customer Management</title>
</head>
<body>
<form action="customerServlet/" method="post">
First Name:<br>
<input type="text" name="firstName"/><br>
Last Name:<br>
<input type="text" name="lastName"/><br>
Email:<br>
<input type="text" name="email"/><br>
Phone:<br>
<input type="text" name="phone"/><br>
Phone Type:<br>
Street Address:<br>
<input type="text" name="streetAddress"/><br>
Apartment Number:<br>
<input type="text" name="apartmentNumber"/><br>
City:<br>
<input type="text" name="city"/><br>
State:<br>
<select name="thePhones" id="selectPhones">
<option selected value="choose">Select a Phone</option>
<c:forEach items="${sessionScope.phones}" var="current" >
<option>${current.getPhoneName()}</option>
</c:forEach>
</select>
<input type="submit" value="submit">
</form>
</body>
</html>