java.text.SimpleDateFormat中format方法得出的字符串再用parse方法转回去结果不一样
SimpleDateFormat s = new SimpleDateFormat("YYYY-MM-dd HH:mm:ss");
String str1 = "2018-06-28 17:37:28";
Date date1 = s.parse(str1);
System.out.println(date1);
/*
*Sun Dec 31 17:37:28 CST 2017
*/