什么会导致jar tvf输出产生以下差异？
bash-3.00$ jar tvf DC_Aging.jar
0 Wed May 16 14:17:48 CDT 2012 META-INF/
71 Wed May 16 14:17:48 CDT 2012 META-INF/MANIFEST.MF
0 Wed May 16 14:17:30 CDT 2012 com/
0 Wed May 16 14:17:30 CDT 2012 com/perf/
0 Wed May 16 14:17:30 CDT 2012 com/perf/sess/
0 Wed May 16 14:17:30 CDT 2012 com/perf/sess/reports/
0 Wed May 16 14:17:30 CDT 2012 com/perf/sess/reports/
0 Wed May 16 14:17:30 CDT 2012 com/perf/sess/reports/business/
0 Wed May 16 14:17:30 CDT 2012 com/perf/sess/reports/business/rules/
0 Wed May 16 14:17:30 CDT 2012 com/perf/sess/reports/business/rules/ed/
22139 Wed May 16 14:17:36 CDT 2012 com/perf/sess/reports/business/rules/ed/DateComparisons.class
这是在同一个控制台上使用相同java版本生成下面输出的相同jar文件。唯一的区别是jar命令的运行日期。这打破了我们的一个脚本。
bash-3.00$ jar tvf DC_Aging.jar
25 Fri Mar 29 09:56:14 CDT 2013 META-INF/MANIFEST.MF
25476 Fri Mar 29 09:52:54 CDT 2013 com/perf/sess/reports/business/rules/ed/DateComparisons.class