How to use log4j in java without declaring it every time it is called?

Question

Every time you write a new class, you must declare it as follows:

private static Logger logger = Logger.getLogger(Test.class);  

Isn’t this very troublesome? Is there any way to set the Logger to a class that can be called statically, directly call the info, error and other methods, and at the same time print out the current class, thread number and other information?

Answer 1

You can simply encapsulate it to achieve what you want, such as building a class to encapsulate Logger and exposing several static interfaces. As for why many codes are written as private static Logger logger = Logger.getLogger(Test.class);, it is actually mainly to improve the flexibility and accuracy of logs.

Answer 2

Look at this /a/11...

Answer 3

Statementlog是因为他可以定义不同的logger name可以通过logger name定制自己的输出方式, 比如level, appender...etc

If your logs are processed in the same way, you can declare it公共的静态 log 对象, 需要的地方使用该logThere will be no duplicate declarations.
For example:

import static xxx.GlobalLogs.log;

log.debug("...");
log.info("...");
//...

Of course you can also use lombok to simplify your code.