<%@ page contentType="text/html; charset=utf-8" %>
...
    <c:forEach items="${bookList}" var="book">
        <div class="col-md-4">
            <c:choose>
                <c:when test="${book.getBookImage() == null}">
                    <img src="<c:url value="C:\\upload\\${book.fileName}"/>" style="width: 60%"/> ➊
                </c:when>
                <c:otherwise>
                    <img src="<c:url value="C:\\upload\\${book.fileName}"/>" style="width: 60%"/> ➊
                </c:otherwise>
            </c:choose>
            <h3>${book.name}</h3>
            <p>${book.author}
            <br>${book.publisher} | ${book.releaseDate}
            <p align=left>${fn:substring(book.description, 0, 100)}...
            <p>${book.unitPrice}원
            <p><a href="<c:url value="/books/book?id=${book.bookId}"/>" class="btn btn-Secondary" role="button">상세정보 &raquo;</a>
        </div>
    </c:forEach>
...