Java获取某年某周的第一天详解编程语言

    /**  
     * @Title:FirstDayOfWeek.java  
     * @Package:com.you.freemarker.model  
     * @Description:获取某年某周的第一天  
     * @author:Youhaidong(游海东)  
     * @date:2014-5-29 下午11:29:53  
     * @version V1.0  
     */   
    package com.you.freemarker.model;   
       
    import java.text.SimpleDateFormat;   
    import java.util.Calendar;   
       
    /**  
     * 类功能说明  
     * 类修改者 修改日期  
     * 修改说明  
     * <p>Title:FirstDayOfWeek.java</p>  
     * <p>Description:游海东个人开发</p>  
     * <p>Copyright:Copyright(c)2013</p>  
     * @author:游海东  
     * @date:2014-5-29 下午11:29:53  
     * @version V1.0  
     */   
    public class FirstDayOfWeek    
    {   
        /**  
         * 获取某年某周的第一天  
         * @Title:getFirstDayOfWeek  
         * @Description:  
         * @param:@param year  
         * @param:@param week  
         * @param:@return  
         * @return:String  
         * @throws  
         */   
        public static String getFirstDayOfWeek(int year,int week)   
        {   
            Calendar cal = Calendar.getInstance();   
            //设置年份   
            cal.set(Calendar.YEAR,year);   
            //设置周   
            cal.set(Calendar.WEEK_OF_YEAR, week);   
            //设置该周第一天为星期一   
            cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);   
            //格式化日期   
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");   
            String firstDayOfWeek = sdf.format(cal.getTime());   
               
            return firstDayOfWeek;   
        }   
           
        /**  
         * @Title:main  
         * @Description:  
         * @param:@param args  
         * @return: void  
         * @throws  
         */   
        public static void main(String[] args)    
        {   
           String firstDay = getFirstDayOfWeek(2014,22);   
           System.out.println("2014年第22周的第一天是：" + firstDay);   
        }   
       
    }