7-22關於agriculture-mvc的理解與完善，經過關鍵字模糊查詢

1. 配置文件中：有關客戶端是手機仍是電腦的判斷（GoodsController.java）

 public String initGoods(Model model, HttpSession session, GoodsForm goodsForm, Device device) throws UnsupportedEncodingException

2.網站的錯誤頁面（error.jsp），會返回錯誤信息，並提示這是一個錯誤頁面

1. <div class="row">
           <div class="well col-md-5 center login-box">
               <div class="alert alert-info">
                   ${exceptionMessage}
               </div>
               <form class="form-horizontal" action="${pageContext.request.contextPath}/" method="get">
                   <fieldset>
                       <p>
                       	這是一個錯誤頁面說明服務器出現了問題，請返回首頁從新登陸。
                       </p>
   
                       <p class="center col-md-5">
                           <button type="submit" class="btn btn-primary">返回首頁</button>
                       </p>
                   </fieldset>
               </form>
           </div>
           <!--/span-->
       </div

3.緩存管理（ehcache）,例如，網站圖片的加載，初次加載時會訪問數據庫，再次請求則會先去緩存中找，若沒有再去數據庫中查找

<li><a href="#"><canvas></canvas>
<img src="shop/images/banner1.jpg" /></a></li>
												
<div class="grid_1_of_3 grid_1_of_3first images_1_of_3" th:class="${status.count%3==1}?'grid_1_of_3 grid_1_of_3first images_1_of_3':'grid_1_of_3 images_1_of_3'" th:each="goodsInfo,status:${list}">												

<img alt="商品詳細狀況" th:src="@{showImage(pictureId=${goodsInfo.pictureId})}" style="height:185px;width:330px;" />

@RequestMapping(value = "showImage", method = RequestMethod.GET)
	public void showImage(HttpServletResponse response, CommodityForm commodityForm) throws IOException {
		log.info("取得商品圖片");
		response.setContentType("image/jpg");
		OutputStream stream = response.getOutputStream();
		try {
			stream.write(commodityService.getPicture(commodityForm));
			stream.flush();
			
		} catch (Exception e) {
			log.info(commodityForm.getPictureId() + ",該圖片不存在，須要補充！");
		} finally {
			stream.close();
		}
	}

4.首頁模糊查詢

• userBar.html中添加一個form表單
  

• <form action="jiansuo" th:object="${guestForm}" method="post">
  	<li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</li>
  	<li><span><input name="commodityName" type="text" /></span></li>
  	<li>&nbsp;&nbsp;&nbsp;&nbsp;</li>
  	<li><span><input name="jiansuo" type="submit" value="搜索" /></span></li>
  </form>

• controller與service中 

•  @RequestMapping(value = "jiansuo", method = RequestMethod.POST,params="jiansuo")
  	    public String jiansuoGoods(Model model, HttpSession session, GoodsForm goodsForm, Device device) throws UnsupportedEncodingException {
  	    	log.info("商品列表初始化");
  	    	
  	    	model.addAttribute("goodsForm", goodsForm);
  	    	model.addAttribute("list", goodsService.jiansuoGoodsList(goodsForm));
  	    	return "shop/index";
  	    }

public List<GoodsForm> jiansuoGoodsList(GoodsForm frm) {

		List<GoodsForm> result = queryDao.executeForObjectList("Goods.jiansuoGoodsList", frm);
		return result;
	}

• sqlMap中的select

• <select id="jiansuoGoodsList" parameterClass="cn.agriculture.web.form.GoodsForm"
  		resultClass="cn.agriculture.web.form.GoodsForm">
  		SELECT commodity.commodity_id as commodityId,
  		commodity.type as type,
  		supplier.supplier_name as supplierName,
  		brand.brand_name as brandName,
  		commodity.commodity_name as commodityName,
  		commodity.weight as weight,
  		commodity.is_gift as isGift,
  		commodity.specifications as specifications,
  		commodity.unit as unit,
  		commodity.benchmark_price as benchmarkPrice,
  		commodity.guide_price as guidePrice,
  		commodity.retail_price as retailPrice,
  		commodity.competition_level as competitionLevel,
  		commodity.note as note,
  		commodity.update_time as updateTime,
  		commodity.update_user as updateUser,
  		commodity.picture_id as pictureId,
  		stock.stock as stock
  		FROM commodity, supplier, brand, stock
  		WHERE
  		commodityName like '%$commodityName$%'
  		<!-- commodity.commodity_name like concat('%',#commodityName#,'%') -->
  	</select>

   5.將<jsp:include page="/WEB-INF/jsp/shop/userBar.jsp"></jsp:include>改成

           <div th:replace="shop/userBar :: page-user-bar"></div>

  6. 靜態方法（static）能夠直接調用，只存在於一個固定空間區域，通常算術時使用；

       而非靜態方法須要建立對象，每次都調用不一樣的區域，可再次使用，互不影響，