100万个日期对象序列化生成的文件45K

	public static void main(String[] args) throws Exception {
		
		System.out.println(String.format("%1$tF %1$tT", Calendar.getInstance()));
		
		//序列化
		/*
		List<Date> dateList=new ArrayList<Date>();
		for(int i=0;i<1000000;i++){
			dateList.add(Calendar.getInstance().getTime());
		}
		
		ObjectOutputStream oos=new ObjectOutputStream(new GZIPOutputStream(new FileOutputStream("1.a"))); //100万 个日期对象生成的文件 45K
		oos.writeObject(dateList);
		oos.close();//注意一定要关闭
		System.out.println("......");
		 */
		//反序列化
		ObjectInputStream ois = new ObjectInputStream(new java.util.zip.GZIPInputStream(new FileInputStream("1.a")));
		@SuppressWarnings("unchecked")
		List<Date> obj = (List<Date>) ois.readObject();
		
	    ois.close();
	    System.out.println(String.format("%1$tF %1$tT", Calendar.getInstance()));
	    System.out.println(obj.size());
	    System.out.println(obj.get(0));
	}