Three Basic Concept: Category: you instantiate a category instance, you can call its various logging methods (such as debug, info, warn, error, fatal) to send your message to log Appender:.. Different destinations the message is appended for example , File, Console, JDBC, ETC. Layout: in Which Format You Want Your Logging Message Will Be Appended. SimpleLayout, Htmllayout, Patternlayout
A File Named Log4j.Properties Should Be create and Placed In Same ClassPath With your application Which Invokes The Log API.
Patterns Associated with MDC: org.apache.log4j.mdc -static void Put (String Key, Object O) - MDC.PUT ("Server", "Jaguar"); - MDC.PUT ("Test" , "MyContext"); in patientLayout =% D% x {server}% x {test} // be careful, x is case sensitive. -Static void remove (String Key)
