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We are developing a web-based application in Java using the Spring framework. We are wondering which Logging system would be the most appropriate for it, whether Log4j or JUL (java.util.Logging), which is integrated with jdk. As far as I'm concerned, the former is more popular among developers and offers higher customization options, but I'm not sure which is simpler to adapt with spring.
any help will be appreciated.
thanks!
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If you are using Spring Boot Starters, Logback will provide a good support for logging. Besides, Logback also provides a use of good support for Common Logging, Util Logging, Log4J, and SLF4J.
One of the most popular solutions for the Java world is the Apache Log4j 2 framework.
Unlike log4j, SLF4J (Simple Logging Facade for Java) is not an implementation of logging framework, it is an abstraction for all those logging frameworks in Java similar to log4J. Therefore, you cannot compare both. However, it is always difficult to prefer one between the two.
Spring Boot also supports either Log4j or Log4j 2 for logging configuration, but only if one of them is on the classpath. If you are using the starter poms for assembling dependencies that means you have to exclude Logback and then include your chosen version of Log4j instead.
Before you start with log4j, look at logback. Log4j shouldn't be used for new projects anymore. If you have legacy code that needs any logging framework, use slf4j to make the old code talk to logback (or log4j if you must).
The main reasons you should not use JUL is that it implements the bare minimum that you need for logging, the configuration is hard at best and, if you use any component that doesn't use it, you'll have to deal with two logging frameworks.
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