https://blog.csdn.net/qq_35415600/article/details/70237433
<body>
<table border="1" cellspacing="0">
<tr>
<td>ip</td>
<td>host</td>
<td>task</td>
<td>item1</td>
<td>item2</td>
<td>item3</td>
</tr>
<tr>
<td rowspan="4">1</td>
<td rowspan="4">2</td>
<td rowspan="4">3</td>
<td rowspan="4">4</td>
<td rowspan="4">5</td>
<td>6</td>
</tr>
<tr>
<td>6</td>
</tr>
<tr>
<td>6</td>
</tr>
<tr>
<td>6</td>
</tr>
</table>
<hr>
<table border="1" cellspacing="0" width="50%" height="150">
<caption>纵向合并单元格</caption>
<tr>
<th>班级</th>
<th>姓名</th>
<th>姓名</th>
<th>年龄</th>
<th>电话</th>
</tr>
<tr>
<td rowspan="2">601班</td>
<td rowspan="2">601班</td>
<td>Jack</td>
<td>24</td>
<td>1351234567</td>
</tr>
<tr>
<td>Tom</td>
<td>22</td>
<td>1351234567</td>
</tr>
<!--rowspan中必须指定要合并的列数目，是两行还是三行等等-->
<tr>
<td rowspan="3">602班</td>
<td rowspan="3">602班</td>
<td>Rose</td>
<td>22</td>
<td>1351234567</td>
</tr>
<tr>
<td>张三</td>
<td>25</td>
<td>1351234567</td>
</tr>
<tr>
<td>李四</td>
<td>25</td>
<td>1351234567</td>
</tr>
</table>
