获取系统当前时间

	public static void test3() throws UnsupportedEncodingException {
		Date time = new Date();
		System.out.println(time);
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
		String str = dateFormat.format(time);
		System.out.println(str);
	}

	public static void test4() throws UnsupportedEncodingException {
		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 定义格式，不显示毫秒

		Timestamp now = new Timestamp(System.currentTimeMillis());// 获取系统当前时间

		String str = df.format(now);

		System.out.println(str);

	}
public static void main(String[] args) throws UnsupportedEncodingException {
		test3();
		test4();
	}

结果：Mon Mar 05 13:34:58 CST 2012
2012-03-05
2012-03-05 13:34:58