PropertyNotFoundExceptionによる500エラーの解決策

実現したいこと（画面操作の流れ）

・操作1.画面aで検索を実行、検索結果の一覧を表示
・操作2.一覧上から任意のデータを選択すると当該データの詳細情報を閲覧できる画面bに遷移

困ってるポイント

画面aから画面bに遷移する際に500エラーが発生。
モデルに詰め込んだ値を画面で受け取ることに失敗する。
※Java、Springフレームワークを用いています。

プログラムの該当箇所

不足があればお手数をおかけしますがご指摘くださいませ。

コントローラー

java
1package practice.component.controller;
2
3import org.springframework.beans.factory.annotation.Autowired;
4import org.springframework.stereotype.Controller;
5import org.springframework.web.bind.annotation.PathVariable;
6import org.springframework.web.bind.annotation.RequestMapping;
7import org.springframework.web.bind.annotation.RequestMethod;
8import org.springframework.web.servlet.ModelAndView;
9import practice.component.repository.GoodsDao;
10import practice.entity.GoodsModel;
11
12@Controller
13public class GoodsDetailController {
14	@Autowired
15	private GoodsDao goodsDao;
16
17	public GoodsDetailController() {
18		super();
19	}
20
21	@RequestMapping(value="/goods/detail_{productId}.do",method = RequestMethod.GET, produces="text/plain;charset=UTF-8")
22	public ModelAndView detailView(@PathVariable("productId") String productId) {
23		GoodsModel goodsModel = this.goodsDao.getGoods(productId);
24
25		ModelAndView modelAndView = new ModelAndView("goods/detail", "goods", goodsModel);
26		return modelAndView;
27	}
28	}
29

モデル

Java
1package practice.entity;
2public class GoodsModel {
3	/** 商品ID */
4	private String productid;
5	/** 商品名 */
6	private String productname;
7	/** 値段 */
8	private String price;
9
10	public String getProductid() {
11		return productid;
12	}
13	public void setProductid(String productid) {
14		this.productid = productid;
15	}
16	public String getProductname() {
17		return productname;
18	}
19	public void setProductname(String productname) {
20		this.productname = productname;
21	}
22	public String getPrice() {
23		return price;
24	}
25	public void setPrice(String price) {
26		this.price = price;
27	}
28}

画面

JSP
1<body>
2<div class="main">
3	<div class="errorArea">${goods.errorMsg}</div>
4	<form action="detail_{productId}.do" method="POST">
5		<table class="productTable">
6		<tr>
7		　<td class="header">商品ID</td>
8		　<td class="data"><input type="text" value="${goods.productId}" name="productId" class="input"/> </td>
9		</tr>
10

エラー内容

例外
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:626)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:515)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:171)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:316)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1373)
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1118)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1057)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

根本原因
javax.el.PropertyNotFoundException: プロパティ[productId]がタイプ[practice.entity.GoodsModel]で見つかりません
javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:260)
javax.el.BeanELResolver$BeanProperties.access$300(BeanELResolver.java:212)
javax.el.BeanELResolver.property(BeanELResolver.java:333)
javax.el.BeanELResolver.getValue(BeanELResolver.java:92)
org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:125)
org.apache.el.parser.AstValue.getValue(AstValue.java:169)
org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:190)
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:701)
org.apache.jsp.WEB_002dINF.views.goods.detail_jsp._jspService(detail_jsp.java:149)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:477)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:171)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:316)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1373)
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1118)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1057)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)