有没有办法在log4j模式中指定当前行号

Question

我有一种模式可以以以下格式输出到控制台和日志文件：

[INFO]  17:31:12 - Checking Bla Bla Bla 
[INFO]  17:31:12 - ************* Starting *********************
[INFO]  17:31:12 - Testing Begins

有什么方法可以添加行数，使其看起来像：

[001][INFO] 17:31:12 - Checking Bla Bla Bla 
[002][INFO] 17:31:12 - ************* Starting *********************
[003][INFO] 17:31:12 - Testing Begins

Answer 1

试试下面的转换模式

ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

Answer 2

在Log4j 1中，可以在此处看到符号 http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/PatternLayout.html

行号为％L。

在Log4j 2中，符号也是％L

https://logging.apache.org/log4j/2.0/manual/layouts.html#Pattern_Layout

Answer 3

Is it line number or count of log lines ordered in sequence ?

if it is line number you can use %L (Used to output the line number 
from where the logging request was issued.)

https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/PatternLayout.html