JSTL学习

1. <c:out value=${name} default="this attribute not exists"/>

2. <c:set var="name" value="this is a test" scope="session|request|page"

3. <c:if test="${user.count==1}">this is the first time</c:if>

4. forEach
    

     <c:forEach var="user" items="${users}">
         <td>${user.userName}</td><td>${user.password}</td>
     </c:forEach>
     

      迭代MAP对象
     

      <c:forEach var="entry" items="${requestScope.MapBean}">
         <td>${entry.key}</td><td>${entry.value}</td>
     </c:forEach>