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14 Some more pages for our grocery

现在我们了解了很多关于使用Thymeleaf的信息,我们可以在我们的网站上添加一些新页面来进行订单管理。

请注意,我们将重点关注HTML代码,但如果您想查看相应的控制器,可以查看捆绑的源代码。

14.1订单清单

让我们从创建订单列表页面开始/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>

这里没有什么可以让我们感到惊讶,除了这一点OGNL魔法:

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

这样做,对于订单中的每个订单行(OrderLine对象),将其purchasePrice和amount属性相乘(通过调用相应的getPurchasePrice()和getAmount()方法)并将结果返回到数字列表中,稍后由#aggregates.sum(...)函数聚合以获得订单总数价钱。

你必须喜欢OGNL的力量。

14.2订单详情

现在,对于订单详细信息页面,我们将在其中大量使用星号语法:

<!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>

除了这个嵌套对象选择外,这里没什么新东西:

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

  ...

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

  ...
</body>

......这*{name}相当于:

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