Question

jsp页面怎么获得map值

Answer 1

<c:forEach var="map" items="${data }">
    ${map.key}
</c:forEach>

Answer 2

request.getParameter

Answer 3

//取出注册页面提交的三个数据
String acnt = request.getParameter("acnt");
String name = request.getParameter("name");
String password = request.getParameter("password");

java.util.HashMap map = new java.util.HashMap<String,Object>();
map.put("acnt",acnt);//放入map中
map.put("name",name);
map.put("password",password);

request.setAttribute("map", map);//放入请求中

后台selerlet取出map
java.util.HashMap map2 =(java.util.HashMap) request.getAttribute("map");
String acnt = map2.get("acnt");
String name= map2.get("name");
String password= map2.get("password");