RouteServlet

@WebServlet("/route/*")

public class RouteServlet extends BaseServlet {

    private RouteService service = new RouteServiceImpl();

    /**

     * 分页查询

     * @param request

     * @param response

     * @throws ServletException

     * @throws IOException

     */

    public void pageQuery(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

//        1. 接收参数

        String currentPagestr = request.getParameter("currentPage");

        String pageSizestr = request.getParameter("pageSize");

        String cidstr = request.getParameter("cid");

        int cid = 0;// 类别 id

//        2. 处理参数

        if(cidstr != null && cidstr.length() > 0){

            cid = Integer.parseInt(cidstr);

        }

        int pageSize = 0;

        if(pageSizestr != null && pageSizestr.length() >= 0){

            pageSize = Integer.parseInt(pageSizestr);

        }else{

            pageSize = 5;// 每页显示条数，如果不传递默认显示 5 条

        }

        int currentPage = 0;

        if(currentPagestr != null && currentPagestr.length() >= 0){

            currentPage = Integer.parseInt(currentPagestr);

        }else{

            currentPage = 1;// 当前页码，如果不传递默认显示为 1

        }

//        3. 调用 service 查询 PageBean 对象

        PageBean<Route> pd = service.pageQuery(cid,currentPage,pageSize);

//        4. 将 pageBean 对象序列化为 json 返回

        writeValue(pd,response);

    }

}