JSP 随记

jstl <c:forEach> 遍历，多个<option>时显示"全部"。单个

option时，默认选中！

引入：<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%> 

<select id="company" name="company" >
    <c:if test="${not empty companies}">
        <c:if test="${fn:length(companies)>1}"><option value="">全部</option></c:if>
        <c:forEach var="company" items="${companies}" varStatus="status">
            <option value="${company.COMPANY_ID}" 
                <c:if test="${param.company eq company.COMPANY_ID}">selected</c:if>>
                ${company.COMPANY_ID}-${company.COMPANY_NAME}
            </option>
        </c:forEach>
    </c:if>
</select>