用css 给tbody加垂直滚动条

思路就是

1，把tbody设置成display:block，然后就对其高度设置一个固定值，overflow设置成auto。

2，把thead的tr设置成display:block。

3，因为都设置成block所以要给td手动添加宽度 width:200px

代码如下：

<table class="table">
                          <thead>
                              <tr>
                                  <th>Id</th>
                                  <th>Name</th>
                                  <th>Category</th>
                                  <th>MonthAmount</th>
                                  <th>hasBackUp</th>
                                  <th>score</th>
                              </tr>
                          </thead>
                          <tbody>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              <tr>
                                  <td>23</td>
                                  <td>South Bearing</td>
                                  <td>Glass/Material</td>
                                  <td>1234444</td>
                                  <td>TRUE</td>
                                  <td>3456.00</td>
                              </tr>
                              
                          </tbody>
                      </table>

.table thead tr {
	display:block;
}
.table tbody {
	display: block;
	height: 200px;
	overflow: auto;
}
.table th {
	width:20%;
}
 .table td {
    width:20%;
 }