About the eclipse Undefined attribute name (role). Solution

Option One:

Only you need to add a header in the jsp:

1     <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

Option II:

Reference blog: https://blog.csdn.net/bymyself11/article/details/51944151

Programming eclipse in error: Undefined attribute name (role) Description This property is no role version does not support issues.

1 <span style="font-family:SimSun;">
2     <ul class="nav nav-tabs" id="ul1">
3         <li role="presentation"><a href="#">hello</a></li>
4         <li role="presentation"><a href="#">文件夹</a></li>
5         <li role="presentation"><a href="#">hhhhh</a></li>
6     </ul>
7 </span>

We just need role programmed data-role attribute to

1 <ul class="nav nav-tabs" id="ul1">
2     <li data-role="presentation"><a href="#">hello</a>
3     </li><li data-role="presentation"><a href="#">文件夹</a></li>
4     <li data-role="presentation"><a href="#">hhhhh</a></li>
5 </ul>