jsp页面中引入java，及消除缓存

<%@ page language="java" import="java.util.*,com.winner.jfreechart.model.ChaozaiModel" pageEncoding="UTF-8"%>


com.winner.jfreechart.model.ChaozaiModel表示引入项目里面的另一个类

消除缓存配置如下:
<%
String path = request.getContextPath();
response.setHeader("pragma","no-cache");
response.setHeader("cache-control","no-cache");
response.setDateHeader("Expires", 0);

%>