在html代码中查找值的xpath

Question

我只想使用xpath从下面的html中获取“美国国家航空航天局”的值

            <table style="margin: 0 5px 0 2px; font-size: 8pt;" class="joaResultsDetailsTable">

                    <tr>
                        <td><strong>Department:</strong></td>
                        <td>National Aeronautics and Space Administration</td>
                    </tr>

                    <tr>
                        <td style="width: 112px;"><strong>Agency:</strong></td>
                        <td>George C. Marshall Space Flight Center</td>
                    </tr>
                    <tr>
                        <td><strong>Open Period:</strong></td>
                        <td>9/10/2012 to 9/14/2012</td>
                    </tr>
                    <tr>
                        <td><strong>Who May Apply:</strong></td>
                        <td>
                            Current students from education institutions interested in paid opportunities wi...

                        </td>
                    </tr>
                    <tr>

                        <td style="vertical-align:top;"><strong>Location(s):</strong></td>

                            <td>Huntsville, Alabama</td>

                    </tr>
                </table>

我希望你能帮我

Answer 1

你没有提供太多的上下文。以下任何XPath表达式都将满足您声明的要求，即当根据您显示的输入进行计算时，表达式的值应该是字符串‘美国国家航空航天局’：

string(self::table/tr[td='Department:']/td[2])

string(self::table/tr[1]/td[2])

string(self::table/descendant::td[2]))

'National Aeronautics and Space Administration'

这些方法中哪一个最适合您取决于您未声明的需求。