Map.Entry 的key和value通过el语法显示数据

%

Map<String, Book> map = new HashMap<String, Book>();

map.put("b1", new Book("001", "ycx", "32"));//b1是key

pageContext.setAttribute("mp", map);//当把map属性传递进去时

Set<Map.Entry<String, Book>> set = map.entrySet();

Iterator<Map.Entry<String, Book>> it = set.iterator();//拿到一个迭代器

while (it.hasNext()) {

Entry<String, Book> et = it.next();

pageContext.setAttribute("et", et);

}

%>

${et.key}<!-- b1 -->

${et.value} <!-- b1 Book [id=001, name=ycx, price=32] 001 ycx 32 -->

${et.value.id} <!--001-->

${et.value.name} <!--ycx-->

${et.value.price} <!--32-->

${mp.b1}<br><!-- Book [id=001, name=ycx, price=32] -->

${mp.b1.id}<br><!-- 001 ycx 32 -->

${mp.b1.name}<br>

${mp.b1.price}<br>