根据 TLD，forEach 标签的属性值无效

Question

我有这个代码

<c:forEach var="l" value="${logs}">
    ...
</c:forEach>

它说：

Attribute value invalid for tag forEach according to TLD

Answer 1

forEach 标签不支持 value 属性。 IE。 <c:forEach value> 无法识别。真的，这基本上就是错误试图告诉你的。

如果你查阅the documentation of the forEach tag，你会发现 value 属性确实在属性 table 中没有提到。仅列出以下属性：

• items - Collection of items to iterate over.
• begin - If items specified: Iteration begins at the item located at the specified index. First item of the collection has index 0. If items not specified: Iteration begins with index set at the value specified.
• end - If items specified: Iteration ends at the item located at the specified index (inclusive). If items not specified: Iteration ends when index reaches the value specified.
• step - Iteration will only process every step items of the collection, starting with the first one.
• var - Name of the exported scoped variable for the current item of the iteration. This scoped variable has nested visibility. Its type depends on the object of the underlying collection.
• varStatus - Name of the exported scoped variable for the status of the iteration. Object exported is of type javax.servlet.jsp.jstl.core.LoopTagStatus. This scoped variable has nested visibility.

猜猜你真正需要哪一个。如果您不确定，Java EE tutorial 可能会有所帮助。