本文是小编为大家收集整理的关于log4j转换模式的时间戳与微秒数的处理/解决方法，可以参考本文帮助大家快速定位并解决问题，中文翻译不准确的可切换到English标签页查看源文。
问题描述
我想在使用log4j生成的日志文件的每个条目的时间戳中添加微秒?
是否可能?我已经在官方文档中搜索过，但是在毫秒下方没有提及单位.
现在我有一个转换模式，如下:
%d{dd/MM/yyyy HH\:mm\:ss,SSS} %-5p [%t] - %m%n
在日期转换模式(％d )中，我想在毫秒后添加 microseconds ( sss )，是否有一种方式去做吧 ?
推荐答案
如果要显示微秒，则需要自己添加.这可以使用自定义格式化器(而不是pattern formatter)
来完成其他推荐答案
从 Java 9 和 log4j 2.11.0 开始，即使使用纳米秒，也可以获得时间戳.
以下是特殊的预定义模式，允许使用微秒或纳秒的时间或时间:
- 模式:%d{ABSOLUTE_MICROS}输出的示例:14:34:02,123456
- 模式:%d{ABSOLUTE_NANOS}输出的示例:14:34:02,123456789
- 模式:%d{DEFAULT_MICROS}输出的示例:2012-11-02 14:34:02,123456
- 模式:%d{DEFAULT_NANOS}输出的示例:2012-11-02 14:34:02,123456789
如果您需要更具体的模式，请使用" nano of-of-em>"图案字母n而不是" second "图案字母S例如%d{dd MMM yyyy HH:mm:ss,nnnn} to %d{dd MMM yyyy HH:mm:ss,nnnnnnnnn}将给出02 Nov 2012 14:34:02,1234 to 02 Nov 2012 14:34:02,123456789.
在您的情况下，由于您需要毫秒和微秒，您的模式可能是%d{dd/MM/yyyy HH:mm:ss,nnnnnn}
log4j 2.11增加了对时间戳的有限支持，比 在Java 9.
上跑步时毫秒
有关更多详细信息，请参阅 https://logging.apache.apache. org/log4j/2.x/Manual/layouts.html
其他推荐答案
问题描述
I want to add microseconds in the timestamp of each entry of my log files generated with log4j, is it possible ?
I have searched in the official documentation but there are no mention of unit below the milliseconds.
Now i have a conversion pattern like the following :
%d{dd/MM/yyyy HH\:mm\:ss,SSS} %-5p [%t] - %m%n
in the date conversion pattern(%d) i want to add microseconds after the milliseconds value(SSS), is there a way to do it ?
推荐答案
If you want to display micro-seconds, you need to add this yourself. This could be done with a custom Formatter (instead of PatternFormatter)
其他推荐答案
Starting from Java 9 and log4j 2.11.0, it is possible to get the timestamp even with nanoseconds.
Here are the special predefined patterns allowing to get a date time or a time with microseconds or nanoseconds:
- Pattern: %d{ABSOLUTE_MICROS} Example of output: 14:34:02,123456
- Pattern: %d{ABSOLUTE_NANOS} Example of output: 14:34:02,123456789
- Pattern: %d{DEFAULT_MICROS} Example of output: 2012-11-02 14:34:02,123456
- Pattern: %d{DEFAULT_NANOS} Example of output: 2012-11-02 14:34:02,123456789
If you need a more specific pattern use the "nano-of-second" pattern letter n instead of the "fraction-of-second" pattern letter S for example %d{dd MMM yyyy HH:mm:ss,nnnn} to %d{dd MMM yyyy HH:mm:ss,nnnnnnnnn} will give 02 Nov 2012 14:34:02,1234 to 02 Nov 2012 14:34:02,123456789.
In your case, as you need milliseconds and microseconds, your pattern could be something like %d{dd/MM/yyyy HH:mm:ss,nnnnnn}
Log4j 2.11 adds limited support for timestamps more precise than milliseconds when running on Java 9.
For more details please refer to https://logging.apache.org/log4j/2.x/manual/layouts.html
其他推荐答案
it is based on SimpleDateFormat and that does not support sub-millisecond formats, so microseconds can not be reported.
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