Type safety: Unchecked cast from Object to ArrayList<Emp>求指导，我哪错了QAQ

Question

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8" import="java.util.*,com.oa.vo.*" %>
<%
List<Emp> list=new ArrayList<Emp>();
list=(ArrayList<Emp>) request.getAttribute("list");
%>

Answer 1

这个只是警告，，，，，类型转换不安全，不用处理