源代码：

package com.oracle.core;

import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.Scanner;

public class CalendarStudy
{

	Calendar c=new GregorianCalendar();
	Scanner scanner=new Scanner(System.in);
	public static void main(String[] args)
	{
		CalendarStudy study=new CalendarStudy();
		study.clcStartAndEnd();
		
	}
	
	public void clcStartAndEnd()
	{
		System.out.println("请输入你指定的时间");
		System.out.println("格式为:2019-04-01");
		String input=scanner.next();
		String[] inputs=input.split("-");
		int year=Integer.parseInt(inputs[0]);
		int month=Integer.parseInt(inputs[1]);
		int day=Integer.parseInt(inputs[2]);
		c.set(year, month-1, day);
		for(int i=7;i>0;i--)
		{
			c.add(Calendar.DAY_OF_YEAR, -i);
			System.out.println(c.get(Calendar.YEAR)+"年"+(c.get(Calendar.MONTH)+1)+"月"+c.get(Calendar.DATE)+"日");
		    c.add(Calendar.DAY_OF_YEAR, i);
		}
		System.out.println(c.get(Calendar.YEAR)+"年"+(c.get(Calendar.MONTH)+1)+"月"+c.get(Calendar.DATE)+"日");
		for(int i=0;i<7;i++)
		{
			c.add(Calendar.DAY_OF_YEAR, 1);
			System.out.println(c.get(Calendar.YEAR)+"年"+(c.get(Calendar.MONTH)+1)+"月"+c.get(Calendar.DATE)+"日");	
		}
	}	
}

运行结果：