service 接口代码

PageInfo<Product> findByPage2(Integer currPage, Integer pageSize);

service实现类代码

public PageInfo<Product> findByPage2(Integer currPage, Integer pageSize) {
    PageHelper.startPage(currPage,pageSize);
    List<Product> productList = productDao.findAll();

    PageInfo<Product> pageInfo = new PageInfo<Product>(productList,3);

    return pageInfo;
}

controller控制层代码

@RequestMapping("/findAll2")
public ModelAndView findAll2(@RequestParam(value = "currPage", defaultValue = "1") Integer currPage,
                             @RequestParam(value = "pageSize", required = false, defaultValue = "3") Integer pageSize) {
    //  准备分页数据
    PageInfo<Product> pageInfo = productService.findByPage2(currPage, pageSize);
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addObject("pageInfo", pageInfo);
    // 指定页面
    modelAndView.setViewName("product-listhelper");
    return modelAndView;
}