JAVA通过某年的几周获取该周的开始时间和结束时间

来源：互联网发布：淘宝网一年的销售额编辑：程序博客网时间：2024/05/16 15:42
这个代码在网上找的。
package com.oce.tsm.ui.sim.banKpi.utils;import java.util.Calendar;public class WeekUtils {        public static void main(String[] args) {            WeekUtils cd = new WeekUtils();        System.out.println("开始时间: " + cd.getStartDayOfWeekNo(2015,47) );        System.out.println("结束时间:" + cd.getEndDayOfWeekNo(2015,47) );                }        /**     * get first date of given month and year     * @param year     * @param month     * @return     */    public String getFirstDayOfMonth(int year,int month){        String monthStr = month < 10 ? "0" + month : String.valueOf(month);        return year + "-"+monthStr+"-" +"01";    }        /**     * get the last date of given month and year     * @param year     * @param month     * @return     */    public String getLastDayOfMonth(int year,int month){        Calendar calendar = Calendar.getInstance();        calendar.set(Calendar.YEAR , year);        calendar.set(Calendar.MONTH , month - 1);        calendar.set(Calendar.DATE , 1);        calendar.add(Calendar.MONTH, 1);        calendar.add(Calendar.DAY_OF_YEAR , -1);        return calendar.get(Calendar.YEAR) + "-" + (calendar.get(Calendar.MONTH) + 1) + "-" +               calendar.get(Calendar.DAY_OF_MONTH);    }        /**     * get Calendar of given year     * @param year     * @return     */    private Calendar getCalendarFormYear(int year){        Calendar cal = Calendar.getInstance();        cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);              cal.set(Calendar.YEAR, year);        return cal;    }        /**     * get start date of given week no of a year     * @param year     * @param weekNo     * @return     */    public String getStartDayOfWeekNo(int year,int weekNo){        Calendar cal = getCalendarFormYear(year);        cal.set(Calendar.WEEK_OF_YEAR, weekNo);        return cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1) + "-" +               cal.get(Calendar.DAY_OF_MONTH);                }        /**     * get the end day of given week no of a year.     * @param year     * @param weekNo     * @return     */    public String getEndDayOfWeekNo(int year,int weekNo){        Calendar cal = getCalendarFormYear(year);        cal.set(Calendar.WEEK_OF_YEAR, weekNo);        cal.add(Calendar.DAY_OF_WEEK, 6);        return cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1) + "-" +               cal.get(Calendar.DAY_OF_MONTH);        }}
0 0