Java获取当前时间的年月日方法

package com.ob;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.Calendar;
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import java.util.Date;
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public class DateTest {
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    public static void main(String[] args) throws ParseException {
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        Calendar now = Calendar.getInstance();
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        System.out.println("年: " + now.get(Calendar.YEAR));
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        System.out.println("月: " + (now.get(Calendar.MONTH) + 1) + "");
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        System.out.println("日: " + now.get(Calendar.DAY_OF_MONTH));
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        System.out.println("时: " + now.get(Calendar.HOUR_OF_DAY));
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        System.out.println("分: " + now.get(Calendar.MINUTE));
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        System.out.println("秒: " + now.get(Calendar.SECOND));
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        System.out.println("当前时间毫秒数：" + now.getTimeInMillis());
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        System.out.println(now.getTime());
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        Date d = new Date();
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        System.out.println(d);
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        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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        String dateNowStr = sdf.format(d);
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        System.out.println("格式化后的日期：" + dateNowStr);
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        String str = "2012-1-13 17:26:33";  //要跟上面sdf定义的格式一样
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        Date today = sdf.parse(str);
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        System.out.println("字符串转成日期：" + today);
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    }
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}
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