一段简单的java 代码，用于日期格式转化

package com.oracle.log.test;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

import com.oracle.log.client.AnalyticsEngineSDK;

public class Test {
	public static String day ="20160607";
	static Random r = new Random();
	public static void main(String[] args) {
//		AnalyticsEngineSDK.onChargeSuccess("orderid123", "oracle");
//		AnalyticsEngineSDK.onChargeRefund("orderid456", "oracle");
		
		try {
			String d = day+String.format("%02d%02d%02d",new Object[]{r.nextInt(24),r.nextInt(60),r.nextInt(60)});
			System.out.println(d);
			Date date = new SimpleDateFormat("yyyyMMddhhmmss").parse(d);
			System.out.println(date);
			String datetime =date.getTime()+"";
			System.out.println(datetime);
			String prefix =datetime.substring(0, datetime.length()-3);
			System.out.println(prefix+"."+r.nextInt(1000));
			System.out.println(new Date(1423634643000l));
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}