<c:forEach begin="0" end="4" var="i">
    <c:set var="ans" value="${list[i]}" />
    <tr>
        <td width="15%">答案${i+1 }<font color="red">*</font>：</td>
        <td width="85%">
            <input type="text" value="<c:if test="${fn:length(list) >= i+1}">${ans.answer }</c:if>" name="answers">
        </td>
    </tr>
</c:forEach>