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14 Some more pages for our grocery

发布于 2023-06-28 19:47:13 字数 5144 浏览 0 评论 0 收藏 0

Now we know a lot about using Thymeleaf, we can add some new pages to our website for order management.

Note that we will focus on HTML code, but you can have a look at the bundled source code if you want to see the corresponding controllers.

14.1 Order List

Let’s start by creating an order list page, /WEB-INF/templates/order/list.html:

<!DOCTYPE html>

<html xmlns:th="http://www.thymeleaf.org">

  <head>

    <title>Good Thymes Virtual Grocery</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <link rel="stylesheet" type="text/css" media="all" 
          href="../../../css/gtvg.css" th:href="@{/css/gtvg.css}" />
  </head>

  <body>

    <h1>Order list</h1>
  
    <table>
      <tr>
        <th>DATE</th>
        <th>CUSTOMER</th>
        <th>TOTAL</th>
        <th></th>
      </tr>
      <tr th:each="o : ${orders}" th:class="${oStat.odd}? 'odd'">
        <td th:text="${#calendars.format(o.date,'dd/MMM/yyyy')}">13 jan 2011</td>
        <td th:text="${o.customer.name}">Frederic Tomato</td>
        <td th:text="${#aggregates.sum(o.orderLines.{purchasePrice * amount})}">23.32</td>
        <td>
          <a href="details.html" th:href="@{/order/details(orderId=${o.id})}">view</a>
        </td>
      </tr>
    </table>
  
    <p>
      <a href="../home.html" th:href="@{/}">Return to home</a>
    </p>
    
  </body>
  
</html>

There’s nothing here that should surprise us, except for this little bit of OGNL magic:

<td th:text="${#aggregates.sum(o.orderLines.{purchasePrice * amount})}">23.32</td>

What that does is, for each order line (OrderLine object) in the order, multiply its purchasePrice and amount properties (by calling the corresponding getPurchasePrice() and getAmount() methods) and return the result into a list of numbers, later aggregated by the #aggregates.sum(...) function in order to obtain the order total price.

You’ve got to love the power of OGNL.

14.2 Order Details

Now for the order details page, in which we will make a heavy use of asterisk syntax:

<!DOCTYPE html>

<html xmlns:th="http://www.thymeleaf.org">

  <head>
    <title>Good Thymes Virtual Grocery</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <link rel="stylesheet" type="text/css" media="all" 
          href="../../../css/gtvg.css" th:href="@{/css/gtvg.css}" />
  </head>

  <body th:object="${order}">

    <h1>Order details</h1>

    <div>
      <p><b>Code:</b> <span th:text="*{id}">99</span></p>
      <p>
        <b>Date:</b>
        <span th:text="*{#calendars.format(date,'dd MMM yyyy')}">13 jan 2011</span>
      </p>
    </div>

    <h2>Customer</h2>

    <div th:object="*{customer}">
      <p><b>Name:</b> <span th:text="*{name}">Frederic Tomato</span></p>
      <p>
        <b>Since:</b>
        <span th:text="*{#calendars.format(customerSince,'dd MMM yyyy')}">1 jan 2011</span>
      </p>
    </div>
  
    <h2>Products</h2>
  
    <table>
      <tr>
        <th>PRODUCT</th>
        <th>AMOUNT</th>
        <th>PURCHASE PRICE</th>
      </tr>
      <tr th:each="ol,row : *{orderLines}" th:class="${row.odd}? 'odd'">
        <td th:text="${ol.product.name}">Strawberries</td>
        <td th:text="${ol.amount}" class="number">3</td>
        <td th:text="${ol.purchasePrice}" class="number">23.32</td>
      </tr>
    </table>

    <div>
      <b>TOTAL:</b>
      <span th:text="*{#aggregates.sum(orderLines.{purchasePrice * amount})}">35.23</span>
    </div>
  
    <p>
      <a href="list.html" th:href="@{/order/list}">Return to order list</a>
    </p>

  </body>
  
</html>

Not much really new here, except for this nested object selection:

<body th:object="${order}">

  ...

  <div th:object="*{customer}">
    <p><b>Name:</b> <span th:text="*{name}">Frederic Tomato</span></p>
    ...
  </div>

  ...
</body>

…which makes that *{name} equivalent to:

<p><b>Name:</b> <span th:text="${order.customer.name}">Frederic Tomato</span></p>

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14 Some more pages for our grocery

14.1 Order List

14.2 Order Details

如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。