java - 表的大小，size() 返回 0

Question

您好，我正在尝试以这种方式获取表格的行数:

int rows = findElements(By.xpath("//div[@class='communications-table ohim-table dataTable']/tbody/tr")).size();

但它返回 0 行。我的表中确实有行，知道吗？谢谢。

HTML:

    <div class="box-content detailsBoxBody">
      <div id="trademarksCommunicationsTable">
       <div id="DataTables_Table_5_wrapper" class="dataTables_wrapper" role="grid">
        <div class="datatables-top full-width">
         <div id="DataTables_Table_5_processing" class="dataTables_processing" style="visibility: hidden;">Processing...</div>
           <table id="DataTables_Table_5" class="communications-table ohim-table dataTable" aria-describedby="DataTables_Table_5_info">
             <thead>
              <tbody role="alert" aria-live="polite" aria-relevant="all">
                <tr class="odd">
                <tr class="even">
                <tr class="odd">
                <tr class="even">
                <tr class="odd">
                <tr class="even">
                <tr class="odd">
                <tr class="even">
                <tr class="odd">
                <tr class="even">
              </tbody>
            </table>
          .....

Answer 1

我认为等待也是一个问题。尝试使用显式等待。并且，请注意我正在使用 css

By byCss = By.cssSelector(".communications-table.ohim-table.dataTable tr");

List<WebElements> elements = (new WebDriverWait(driver, 10)).until(ExpectedConditions.presenceOfAllElementsLocatedBy(byCss));

elements.size();