2023年2月1日 · Log4j will inspect the "log4j2.configurationFile" system property and, if set, will attempt to load the configuration using the ConfigurationFactory that matches the file extension. Note that this is not restricted to a location on the local file system and may contain a URL.

2017年2月4日 · # Set up logging to include a file record of the output # Note: the file is always created, even if there is # no actual output. log4j.rootLogger=error, stdout, R # Log format to standard out log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout ...

2016年9月18日 · Logback is considered more modern and feature-rich than Log4j 1.x but Log4j 2.x has many improvements, including asynchronous logging, making it competitive with Logback. Log4j 2.x and Logback are often chosen for new applications, while Log4j 1.x is considered outdated. In short: Use SLF4J for a standardized logging interface.

2011年10月12日 · In log4j this is modelled as an integer. Loggers have a THRESHOLD (aka a LoggerConfig level, used to filter Events) By convention, log4j defines some Standard Log Levels. In v2.x these are (in order of decending severity): …

@skaffman: Actually I am using log4j-1.2.8.jar and I wanted to print all stackTrace on my log file so I tried like above you mentioned but is is printing on my log file only nullPointerException. I was used on my code e.printStackTrace() it prints all trace. Why this Kolavery ? –

Log4j by default looks for a file called log4j.properties or log4j.xml on the classpath.. You can control which file it uses to initialize itself by setting system properties as described here (Look for the "Default Initialization Procedure" section).

2010年8月1日 · Is there any way to tell to log4j to write its log to the file and to the console? thanks there are my properties: log4j.rootLogger=DEBUG,console,R log4j.rootLogger=INFO, FILE log4j.appender.CONS...

If you are using log4j, you could simply exclude the log4j-over-slf4j.jar. In theory using log4j and hacking other code to route the log4j calls to slf4j can lead to recursion and hence the strict check. –

2013年8月15日 · You can use Log4j IOStreams. The IOStreams component is a Log4j API extension that provides numerous classes from java.io that can either write to a Logger while writing to another OutputStream or Writer, or the contents read by an InputStream or Reader can be wiretapped by a Logger.

2012年8月1日 · There is no Log4J symbol that does exactly what you want. %d returns the current date with a given pattern, defined by a SimpleDateFormat (the pattern you put between the brackets), but doesn't give you the time in millis. %r gives the number of milliseconds since the start of execution.