JSP自定義標籤報錯：cvc-complex-type.2.4.d: Invalid content was found starting with element 'required'.

JSP自定義標籤報錯： cvc-complex-type.2.4.d: Invalid content was found starting with element 'required'.No child element is expected at this point. 錯的比較奇怪。原因莫名，僅僅記錄。 把<required>true</required> 標籤移動到 <fragment>

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