Illustrative examples of the number of
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%c
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Full name listed logger namespace, if coupled with {<levels> List} represents the specified number counted from the innermost layer of the namespace |
Example log4j profile parameters
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The output shows media
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| Suppose the current logger namespace is "abc" | |||
| %c | a.b.c | ||
| %c{2} | b.c | ||
| %20c | (If the namespace length is less than 20, then padded with spaces left) | ||
| %-20c | (If the namespace length is less than 20, then to the right with spaces) | ||
| % .30c | (If the name is longer than 30 space, cut off the excess characters) | ||
| % 20.30c | (If the namespace length is less than 20, then padded with spaces on the left; if the name space is longer than 30, cut off the excess characters) | ||
| % -20.30c | (If the namespace length is less than 20, then padded with spaces to the right; if the name space is longer than 30, cut off the excess characters) | ||
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%C
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It lists the full name (including the package path) call logger class | Suppose the current class is "org.apache.xyz.SomeClass" | |
| %C | org.apache.xyz.SomeClass | ||
| %C{1} | SomeClass | ||
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%d
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Display the log recording time, {<date format>} using the date format defined by ISO8601 | %d{yyyy/MM/dd HH:mm:ss,SSS} | 2005/10/12 22:23:30,117 |
| %d{ABSOLUTE} | 22:23:30,117 | ||
| %d{DATE} | 12 Oct 2005 22:23:30,117 | ||
| %d{ISO8601} | 2005-10-12 22:23:30,117 | ||
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%F
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Call logger displays the source file name | %F | MyClass.java |
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%l
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The occurrence location of the output log events, including the categories were the threads, as well as the number of lines in the code | %l | MyClass.main(MyClass.java:129) |
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%L
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Call logger display lines of code | %L | 129 |
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%m
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It outputs a message | %m | This is a message for debug. |
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%M
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显示调用logger的方法名 | %M | main |
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%n
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当前平台下的换行符 | %n | Windows平台下表示rn UNIX平台下表示n |
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%p
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显示该条日志的优先级 | %p | INFO |
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%r
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显示从程序启动时到记录该条日志时已经经过的毫秒数 | %r | 1215 |
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%t
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输出产生该日志事件的线程名 | %t | MyClass |
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%x
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按NDC（Nested Diagnostic Context，线程堆栈）顺序输出日志 | 假设某程序调用顺序是MyApp调用com.foo.Bar | |
| %c %x - %m%n | MyApp - Call com.foo.Bar. com.foo.Bar - Log in Bar MyApp - Return to MyApp. |
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%X
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按MDC（Mapped Diagnostic Context，线程映射表）输出日志。通常用于多个客户端连接同一台服务器，方便服务器区分是那个客户端访问留下来的日志。 | %X{5} | （记录代号为5的客户端的日志） |
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%%
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显示一个百分号 | %% | % |
-----转https://avaj.iteye.com/blog/246088