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/**
 * javaʱ¼ä¼ÆËã(intºÍlongҪעÒ⣬һ¶¨ÒªÑ¡Ôñlong)
 * @author ´ÞÎÀ±ø
 *
 */
public class TimeTester {
   
    /**
     * ¼ÆË㼸ÌìǰµÄºÁÃëÊý
     * @param days
     * @return
     */
    public static long getBeginSpan(long now,int days){
        long beginspan = now-60*60*24*days*1000;
        return beginspan;
    }
   
    /**
     * ¼ÆË㼸ÌìǰµÄºÁÃëÊý
     * @param days
     * @return
     */
    public static long getBeginSpan2(long now,int days){
        long lessThisLong = 60*60*24*days*1000l;
        long beginspan = now-lessThis;
        return beginspan;
    }
   
    /**
     * ¼ÆË㼸ÌìǰµÄºÁÃëÊý
     * @param days
     * @return
     */
    public static long getBeginSpan3(long now,int days){
        int lessThisInt = 60*60*24*days*1000;
        System.out.println("lessThis:"+lessThis);
        long beginspan = now-lessThis;
        return beginspan;
    }
    public static void main(String[] args) {
        long now = System.currentTimeMillis();
        System.out.println("now:"+now);
        System.out.println("be


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