ecahrts实现动态刷新(隔几秒重新显示)

代码:

servlet代码：

package cn.itcast.servlet;

import cn.itcast.bean.Days;
import cn.itcast.bean.Spider;
import cn.itcast.dao.DaysDao;
import cn.itcast.dao.SpiderDao;
import com.google.gson.Gson;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

public class SpiderServlet extends HttpServlet {
    private SpiderDao spiderDao =new SpiderDao();
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("UTF-8");
        resp.setCharacterEncoding("UTF-8");
        Gson gson = new Gson();
        List list=spiderDao.getSpider();
        resp.getWriter().write(gson.toJson(list));
    }
}

生成效果: