java诡异程序，不管你信不信，反正我信了

package com.xiaogu;
import java.text.SimpleDateFormat;
import java.text.ParseException;
import java.util.Date;
import java.util.TimeZone;
public class Test1{
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        sf.setTimeZone(TimeZone.getTimeZone("Asia/shanghai"));
        String str3 = "1927-12-31 23:54:07";
        String str4 = "1927-12-31 23:54:08";
        Date date1 = sf.parse(str3);
        Date date2 = sf.parse(str4);
        long ld1 = date1.getTime() /1000;
        long ld2 = date2.getTime() /1000;
        System.out.println(ld1);
        System.out.println(ld2);
        System.out.println(ld2-ld1);//难道它不应该输出1吗？
    }
}

答案：
-1325491905
-1325491552
353

评论

2 楼 kobbyla 2011-09-21  

hareamao 写道

依照sun的描述，这是因为1928年以前，上海使用的是本地时间，而不是东八区时间。

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7070044

引用

Assuming the time zone is Asia/Shanghai, Local Mean Time was used until 1928-01-01. The following is the time zone data from the Olson tzdata.

Zone Asia/Shanghai 8:05:52 - LMT 1928
8:00 Shang C%sT 1949
8:00 PRC C%sT

Therefore, the transition is correct.

Thank you...understanding

1 楼 hareamao 2011-09-08  

依照sun的描述，这是因为1928年以前，上海使用的是本地时间，而不是东八区时间。

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7070044

引用

Assuming the time zone is Asia/Shanghai, Local Mean Time was used until 1928-01-01. The following is the time zone data from the Olson tzdata.

Zone Asia/Shanghai 8:05:52 - LMT 1928
8:00 Shang C%sT 1949
8:00 PRC C%sT

Therefore, the transition is correct.