目录结构：

代码部分:

1.Product类

package app.domain;

import java.io.Serializable;

public class Product implements Serializable{
private String name;
private String description;
private float price;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public float getPrice() {
return price;
}
public void setPrice(float price) {
this.price = price;
}

}

2.ProductForm类

package app.form;

public class ProductForm {
private String name;
private String description;
private String price;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDecription() {
return description;
}
public void setDecription(String description) {
this.description = description;
}
public String getPrice() {
return price;
}
public void setPrice(String productPrice) {
this.price = productPrice;
}

}

3.controllerServlet类

package app.Servlet;
import java.io.IOException;

import javax.servlet.RequestDispatcher;
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 app.domain.Product;
import app.form.ProductForm;

/**
* Servlet implementation class controllerServlet
*/
@WebServlet(name="controllerServlet",urlPatterns= {"/add","/saved"})
public class controllerServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

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

/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
process(request,response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

process(request,response);
}
/*
* <lable for="description">description:</lable>
<input type="text" id="description" name="description">
</p>

<p>
<lable for="price:">price:</lable>
<input type="text" id="price" name="price">
*/
private void process(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//获取uri
String uri=request.getRequestURI();
System.out.println(uri);
//获取最后一个反斜杠 / 位置
int lastf=uri.lastIndexOf("/");
uri=uri.substring(lastf+1);
//action
if(uri.equals("saved")) {//如果为提交的表单则进行保存
System.out.println(uri);
String ProductName=request.getParameter("name");
String ProductDesription=request.getParameter("description");
String ProductPrice=request.getParameter("price");
//添加到productform对象中
//创建form
ProductForm productform=new ProductForm();
productform.setName(ProductName);
productform.setDecription(ProductDesription);
productform.setPrice(ProductPrice);

//保存到Product
//创建model
Product product=new Product();
product.setName(productform.getName());
product.setDescription(productform.getDecription());
product.setPrice(Float.parseFloat(productform.getPrice()));

//保存model for view
request.setAttribute("product", product);
//response.seta
}else {
System.out.println("pppp!!!");
}

//forward to view
String dispatchUrl=null;
if(uri.equals("add")){
dispatchUrl="WEB-INF/jsp/ProductForm.jsp";
System.out.println("访问form");
}else {
dispatchUrl="WEB-INF/jsp/formSaved.jsp";
}
RequestDispatcher rd=null;
if(dispatchUrl!=null) {
rd=request.getRequestDispatcher(dispatchUrl);
}
rd.forward(request, response);
}

}

jsp页面：

1.填写表单：

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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>Insert title here</title>
</head>
<body>
<div>

<form action="saved">
<fieldset>

<legend>Add a product</legend>

<table>
<tr>
<td><lable for="name">Product name:</lable></td>
<td><input type="text" id="name" name="name"></td>
</tr>

<tr>
<td><lable for="description">description:</lable></td>
<td><input type="text" id="description" name="description"></td>
</tr><br/>

<tr>
<td><lable for="price:">price:</lable></td>
<td><input type="text" id="price" name="price"></td>
</tr><br/>

<tr id="buttons">
<td><input id="reset" type="reset"/></td>
<td><input id="submit" type="submit"/></td>
</tr><br/>
</table>
</fieldset>
</form>
</div>
</body>

</html>

2.提交反馈：