if.jsp

jsp app +strus harmnate jdbc 必要的学习资料

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<c:if test="${empty param.name}" var="noName">
  lack of parameter named name in current request.
</c:if>
<c:if test="${!noName}">
  hello, ${param.name}
</c:if>
<c:if test="${!empty param.age}">
   <c:if test="${param.age > 18}" var="isAdult">
   	  you are an adult.
   </c:if>
   <c:if test="${!isAdult}">
   	  you are a boy.
   </c:if>   
</c:if>