Java获取某年某周的第一天

2015/02/26 35725

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/**
 * @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); 
    } 
   
}