Java实现计算两个日期间相隔周数

package com.wms;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Scanner;

public class WeeksFigureOuter {

    public static void main(String[] args) {

        
        Scanner input = new Scanner(System.in);
        System.out.println("请输入起始日期：（格式：yyyy-MM-dd）");
        String start = input.next();
        System.out.println("请输入终止日期：（格式：yyyy-MM-dd）");
        String end = input.next();
        
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
        try {
            long from = df.parse(start).getTime();
            long to = df.parse(end).getTime();
            System.out.println("相差周数为："+(to-from)/(1000*3600*24*7));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        
    }

}