java - : ORA-01722: invalid number error in JSTL query -

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Friends I am working on jsp and servlets and web application in oacle SQL developer .. in myjsp.jsp I have a List 

  list & lt; String & gt; Sex list = (list & lt; string & gt;) request.getAttribute ("sex list"); & Gt%;

and put it in the combo box in the JSTL tag like this

and I 

  & lt; Sql: query data source = "$ {dbcon}" var = "result" & gt; Choose first name, last name from members where sex =? & Lt; Sql: Ultimate value = "$ {gender}" & gt; & Lt; / Sql: Ultimate & gt;

And in my database there is gender number (0,1) .. So no help to avoid error ??


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