EL表达式 ${pageScope.str} str:属性名; ${requestScope.str} str:属性名; ${sessionScope.str} str:属性名; ${applicationScope.str} str:属性名; 也可以写${str} str:属性名 按scop值从小到大查找 array、list、map 取map对象时 ${str.key} str:map属性名,key:map的key值。也可以写为 ${str["key"]} <C : if test = "true" var =　＂c1＂　scope＝＂session＂> <c : when test = ""> </c : when> <c : otherwise> <c/ choose> <c : set var = "" value = "" scope = ></set> <c : set target = "" property = "" value = ""></set> <c : out value = "" default = ""></c:out> <c : out value = "" escapeXml="true/false"></c:out> <c : forEach item="" var = "" begin = "" end = "" step = "" varStatu = "">(index,first,last,count) 遍历内容 </c:forEach>