javax.el.PropertyNotWritableException: Illegal Syntax for Set Operation

写错了EL 表达式，页面总是报错

错误写法：

<c:if test="${uid == '3d265f74b5c7425da4d788e8c688c9d2'  || uid ='1868a1fdd7dc487eb644b7add6175a13'}">

改成：

<c:if test="${(uid == '3d265f74b5c7425da4d788e8c688c9d2') || (uid == '1868a1fdd7dc487eb644b7add6175a13')}">

要用括号才能正常