根基id查询不同类别的旅游线路数据

分页展示旅游线路数据

 编码的编写

　　客户端代码编写

　　服务器端代码编写

　　　　创建了PageBean对象

public class PageBean <T>{
    private int totalCount;//总记录数
    private int totalPage;//总页数
    private int currentPage;//当前页码
    private int pageSize;//每页显示的条数

    private List<T> list;//每页显示的数据集合

    public int getTotalCount() {
        return totalCount;
    }

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

    public int getTotalPage() {
        return totalPage;
    }

    public void setTotalPage(int totalPage) {
        this.totalPage = totalPage;
    }

    public int getCurrentPage() {
        return currentPage;
    }

    public void setCurrentPage(int currentPage) {
        this.currentPage = currentPage;
    }



    public int getPageSize() {
        return pageSize;
    }

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

    public List<T> getList() {
        return list;
    }

    public void setList(List<T> list) {
        this.list = list;
    }
}

旅游线路分页展示_分页数据展示_代码实现Servlet

　　后台代码编写

　　　　RouteServlet

@WebServlet("/route")
public class RouteServlet extends BaseServlet{
    private RouteService service= new RouteServiceImpl();
    /**
     * 分页查询
     * @param req
     * @param resp
     * @throws ServletException
     * @throws IOException
     */
    public void pageQuery(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //接受参数
        String currentPageStr = req.getParameter("currentPage");
        String pageSizeStr  = req.getParameter("pageSize");
        String cidStr  = req.getParameter("cid");
        //处理参数
        int cid = 0;//类别id
        if (cidStr !=null && cidStr.length()>0){
            cid = Integer.parseInt(cidStr);
        }

        //处理参数
        int currentPage = 0;//当前页码，如果不传递，则默认为第一页
        if (currentPageStr !=null&&currentPageStr.length()>0){
            currentPage = Integer.parseInt(currentPageStr);
        }else {
            currentPage=1;
        }

        //处理参数
        int pageSize = 0;//每页显示条数，如果不传递，默认每页显示5条记录
        if (pageSizeStr !=null&&pageSizeStr.length()>0){
            pageSize = Integer.parseInt(pageSizeStr);
        }else{
            pageSize=5;
        }

        //调用service查询PageBean对象
        PageBean<Route> pb = service.pageQuery(cid,currentPage,pageSize);
        //将PageBean序列化并返回
        writerValue(pb,resp);
    }
}

　　　　RouteService

　　　　RouteDao