为什么创建不了pager对象呢

Pager.java

package com.imooc.shop.utils;

public class pager {
    //当前页码
    private int pageIndex = 1;
    //每页展示的数据条数
    private int pageSize = 3;
    //当前条件下总的数据量
    private int totalCount;
    //一共多少页
    private int totalPages;

    public int getPageIndex() {
        return pageIndex;
    }

    public void setPageIndex(int pageIndex) {
        pageIndex = pageIndex<=0?1:pageIndex;
        pageIndex = pageIndex>=getTotalPages()?getTotalPages():pageIndex;
        this.pageIndex = pageIndex;
    }

    public int getPageSize() {
        return pageSize;
    }

    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }

    public int getTotalCount() {
        return totalCount;
    }

    public void setTotalCount(int totalCount) {
        this.totalCount = totalCount;
    }

    public int getTotalPages() {
        return totalPages;
    }

    public void setTotalPages(int totalPages) {
        this.totalPages = (this.getTotalCount()-1)/this.getPageSize()+1;
    }
}


ListServlet.java

package com.imooc.shop.action;

import com.imooc.shop.entity.Article;
import com.imooc.shop.entity.ArticleType;
import com.imooc.shop.service.ShopService;
import org.springframework.util.StringUtils;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

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

import static com.sun.deploy.config.JREInfo.getAll;

@WebServlet("/list")
public class ListServlet extends HttpServlet {
    // 定义业务层对象
    private HttpServletRequest request;
    private HttpServletResponse response;
    private ShopService shopService;

    @Override
    public void init() throws ServletException {
        super.init();
        // 获取sping的容器。然后从容器中得到业务层对象
        ServletContext servletContext = this.getServletContext() ;
        WebApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(servletContext);
        shopService = (ShopService) context.getBean("shopService");
    }

    @Override
    protected void service(HttpServletRequest req,HttpServletResponse resp) throws ServletException, IOException,NullPointerException {
        try {
            this.request = req;
            this.response = resp;
            request.setCharacterEncoding("UTF-8");
            String method = request.getParameter("method");
            switch (method) {
                case "getAll":
                    getAll();
                    break;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
        private void getAll () throws ServletException, IOException {
            Pager pager = new Pager();


            String typeCode = request.getParameter("typeCode");
            String secondType = request.getParameter("secondType");
            request.setAttribute("secondType",secondType);
            String title = request.getParameter("title");
            if(!StringUtils.isEmpty(typeCode)){
                List<ArticleType> secondTypes = shopService.loadSecondArticleType(typeCode);
                request.setAttribute("typeCode",typeCode);
                request.setAttribute("secondTypes",secondTypes);
                request.setAttribute("title",title);
            }
            List<ArticleType> firstArticleTypes = shopService.loadFirstArticleType();
            List<Article> articles = shopService.getAllArticles(typeCode,secondType,title);
            request.setAttribute("firstArticleTypes",firstArticleTypes);
            request.setAttribute("articles",articles);
            request.getRequestDispatcher("/WEB-INF/jsp/list.jsp").forward(request,response);
        }

    }

没有导包的提示，手动导包也没用