【20180928】SpringBoot Log4j日志记录

背景与用途

• log4j的配置文件是用来设置纪录器的级别、存放位置和布局的，可以通过Java属性文件（key＝value）格式设置或XML格式设置。

• SpringBoot中内置了log4j。

调试Sample代码

    public static void main(String [] args) {
        //BasicConfigurator.configure();
        Logger logger  = LoggerFactory.getLogger(Log4jT.class);
        logger.debug( " this is {} debug log", Log4jT.class.getName() );
        logger.error( " this is {} error log", Log4jT.class.getName());
    }
结果：
log4j:WARN No appenders could be found for logger (com.xiaofan.test.Test).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

import org.apache.log4j.Logger;
public class Test {
    private static Logger logger= Logger.getLogger(Test.class);
    public static void main(String[] args){
        logger.debug("This is a debug message.");
        logger.info("This is a info message.");
        logger.error("This is a error message.");
    }
}

参考资料

• https://juejin.im/entry/597d4f256fb9a03c4541e110