Question

如何用jstl定义一个map并赋值

Answer 1

定义一个Map可以使用jsp:useBean
往Map里填值可以使用c:set 标签
例子：

Java code

<%-- Create a hash map and store it in session scope --%>

<jsp:useBean id='map' class='java.util.HashMap'

scope='session'>

<%-- Add initial key/value pairs stored in the hash

map. The following <c:set> actions are only invoked

when the hash map is created. --%>

<c:set target='${map}' property='inline skates'

value='149.99'/>

<c:set target='${map}' property='hockey stick'

value='29.99'/>

<c:set target='${map}' property='elbow pads'

value='19.99'/>

<c:set target='${map}' property='puck'

value='5.99'/>

</jsp:useBean>