jstl-編碼問題設定

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<c:set value="OK" var="login" scope="session"/>
<fmt:requestEncoding value="utf-8"/>

<c:choose>
   <c:when test="${param.username != '' && param.password !=''}">
   ${param.username}
    <c:redirect url="ok.jsp"/>
   </c:when>
   <c:otherwise>
   <c:redirect url="fail.jsp"/>
   </c:otherwise>
</c:choose>