public static String  getSemesterschoolyear() {
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd",
				Locale.CHINESE);
	//1、首先获得当前时间
		Calendar caNow=Calendar.getInstance();
		//当前时间的年
		int year =caNow.get(Calendar.YEAR);
		Calendar c2=Calendar.getInstance();
		c2.set(year, 2,1);
		Calendar c3=Calendar.getInstance();
		c3.set(year, 7,1);
		if(caNow.after(c2)&&caNow.before(c3))
		{
			int yea=year-1;
			return yea+"\t-\t"+year+"学年"+"\t"+"第二学期";
		}
	    c2.set(year+1, 0,1);
	    if(caNow.after(c3)&&caNow.before(c2))
	    {
	    	int lastYear=year+1;
			return year+"\t-\t"+lastYear+"学年"+"\t"+"第一学期";
	    }else 
	    	return null;
		
	
	}