JAVA通过某年的几周获取该周的开始时间和结束时间-蒲公英云

JAVA通过某年的几周获取该周的开始时间和结束时间

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);      
    \}  
\}