java - Apakah yang perlu saya lakukan jika butang paging di bawah hilang selepas paging jadual bootstrap dan bagaimana untuk mengembalikan jumlah halaman?

Question

        url: "userPersonServlet?method=findByPage",
        method: "post",
        columns: [{
            checkbox: true,
            field: "选择"
        }, {
            field: 'Number',
            title: 'ID',
            formatter: function (value, row, index) {
                return index + 1;
            },
            align: "center"
        }, {
            field: "username",
            title: "姓名",
            align: "center"
        }, {
            field: "email",
            title: "邮箱",
            align: "center"
        }, {
            field: "graduate",
            title: "毕业学校",
            align: "center"
        }, {
            field: "education",
            title: "学历",
            align: "center"
        }, {
            field: "phone",
            title: "手机号",
            align: "center"
        }, {
            field: "computer",
            title: "技能",
            align: "center"
        }, {
            field: "computer",
            title: "技能",
            align: "center"
        }, {
            field: "操作",
            title: "操作",
            formatter: function (value, row, index) {
                return ["<a class='btn btn-default' href='userPersonServlet?method=findById&id[]=" + row.id + "&state=0'>查看</a>",
                    "<a class='btn btn-default' href='userPersonServlet?method=findById&id[]=" + row.id + "&state=1'>编辑</a>",
                    "<a class='btn btn-default' href='userPersonServlet?method=delete&row=" + row.id + "&state=2'>删除</a>"].join(" ");
            },
            align: "center"
        }],
        pagination: true,
        pageNumber: 1,
        pageSize: 10,
        pageList: [10, 20, 30, 50],
        onlyInfoPagination: false,
        sidePagination: "server",
        queryParamsType: "",
        queryParams:  function  (params) {
            console.log(params.pageSize);
            console.log(params.pageNumber);
            return {pageSize: params.pageSize, pageNumber: params.pageNumber};
        },
        uniqueId: "username",
        dataType: "json",
        idField: "username",
        contentType: "application/x-www-form-urlencoded",
        paginationPreText: "上一页",
        paginationNextText: "下一页",
        cache: false,
        toolbar: "#toolbar",
        maintainSelected: true,
        clickToSelect: true
    });
    
    
    
    
    
    java代码：
    private void findByPage(HttpServletRequest req, HttpServletResponse resp) {
        String pageSize = req.getParameter("pageSize");
String pageNumber = req.getParameter("pageNumber");
System.out.println("pageSize = " + pageSize);
System.out.println("pageNumber = " + pageNumber);
UserPersonService userPersonService = new UserPersonServiceImpl();
try {
    List<UserPerson> users = userPersonService.findByPage(Integer.parseInt(pageNumber), Integer.parseInt(pageSize));
    System.out.println(users);
    String userPerson = "{\"total\": " + users.size() + ", \"rows\": " + JSONArray.fromObject(users) + "}";
    System.out.println(userPerson);
    resp.setContentType("text/html;charset=UTF-8");
    resp.getWriter().write(userPerson);
} catch (Exception e) {
    try {
        resp.setContentType("text/html;charset=utf-8");
        String json = "{\"status\":\"error\",\"message\":\"失败\"}";
        resp.getWriter().write(json);
    } catch (IOException e1) {
        e1.printStackTrace();
    }
}

}

Answer 1

Apabila halaman di sebelah pelayan, contentType: "application/x-www-form-urlencoded" mesti dikonfigurasikan
Dan jumlah mesti dikembalikan, yang mewakili jumlah bilangan rekod dalam pangkalan data.