java 实现前端分页，上一页，下一页

// 获取count
ArticleSearch search = new ArticleSearch();
search.setType(customerIndustry);
search.setBegin(page - 1);
search.setLength(5);
Integer count = articleService.getCountBySearch(search).getData();
if (count != null && count > 0) {
    // 当前页数
    model.addAttribute("currentPage", page);
    // 总页数
    int lengthPage  = (int)Math.ceil((double)count/search.getLength());
    model.addAttribute("lengthPage", lengthPage);
    // 处理中间页数
    List<Integer> pageList = handlePage(page, lengthPage);
    model.addAttribute("pageList", pageList);
    // 是否可点击上一页
    model.addAttribute("canViewPre", !page.equals(pageList.get(0)));
    // 是否可点击下一页
    model.addAttribute("canViewNext", !page.equals(pageList.get(pageList.size() - 1)));
    List<ArticleAO> articleList = articleService.getListBySearch(search).getData();
    articleService.handleInfo(articleList);
    model.addAttribute("articleList", articleList);
}

// 处理中间页数
    private List<Integer> handlePage(int currentPage, int lengthPage) {
        List<Integer> pageList = new ArrayList<>();
        int start;
        int end;
        // 总共需展示多少页
        int sum = 10;
        // 当前页前面有几页
        int front = 5;
        // 当前页后面有几页
        int after = 4;
        // 计算start
        if (currentPage - front > 0) {
            start = currentPage - front;
        } else {
            start = 1;
            after = sum - currentPage;
        }
        // 计算end
        if (lengthPage > sum) {
            if (currentPage + after > lengthPage) {
                end = lengthPage;
            } else {
                end = currentPage + after;
            }
        } else {
            end = lengthPage;
        }
        for (int i = start; i <= end; i++) {
            pageList.add(i);
        }
        return pageList;
    }