export declare const zero: (value: number | string) => string | number;
export default class DateUtil {
    constructor();
    static getCurrentDateTime(format?: string): string;
    static toDateString(date: Date, format?: string): string;
    static toDateTimeString(date: Date, format?: string): string;
    static toDateFormat(date: Date, format: string): string;
    static addMonth(date: Date, gap: number): Date;
    static addDay(date: Date, gap: number): Date;
}
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