//重寫doGet方法protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {  // TODO Auto-generated method stub​  request.setCharacterEncoding("UTF-8");//防止request請求時中文數據出現亂碼  String flag = request.getParameter("flag");//通過flag值判定增刪改查操作  if(flag == null) {    queryOffer(request,response);  }else if("add".equals(flag)){    addOffer(request,response);  }else if("del".equals(flag)) {    deleteOffer(request,response);  }else if("update".equals(flag)) {    updateOffer(request,response);  }}​//處理從數據庫查詢到的數據以返回前端protected void queryOffer(HttpServletRequest request, HttpServletResponse response) {  // TODO Auto-generated method stub  List<Offer> offers = new ArrayList<Offer>();  offers = offerservice.queryOfferService();  try {    String str=JSONArray.toJSONString(offers);//將數據庫查詢到的集合轉換成JSON字符串    System.out.println(str);    response.setContentType("text/html;charset=utf-8");//防止response時中文數據亂碼    response.getWriter().print(str);//向前臺傳遞字符串  } catch (Exception e) {    // TODO Auto-generated catch block    e.printStackTrace();  }}

<table id="dg" title="用戶列表" class="easyui-datagrid" style="width:80%;height:250px"      url="<%=request.getContextPath() %>/OfferServlet"         toolbar="#toolbar"      rownumbers="true" fitColumns="true" singleSelect="true">    <thead>      <tr>        <th field="offerid" width="50">商品ID</th>        <th field="offername" width="100">商品名稱</th>        <th field="offertype" width="200">商品類型</th>        <th field="offerdesc" width="200">商品描述</th>        <th field="price" width="200">商品價格</th>      </tr>    </thead>  </table>

<table id="dg" title="用戶列表" class="easyui-datagrid" style="width:1000px;height:250px" toolbar="#toolbar"></table>

$(function(){  $('#dg').datagrid({    url:"${pageContext.request.contextPath}/OfferServlet",//servlet路徑    columns:[[      {field:'offerid',title:'商品ID',width:100},      {field:'offername',title:'商品名稱',width:100},      {field:'offertype',title:'商品類型',width:100},      {field:'offerdesc',title:'商品描述',width:300},      {field:'price',title:'商品價格',width:150}    ]]     });});