package com.toogen.log4j;import org.apache.log4j.Level;
import org.apache.log4j.Logger;public class HelloLog4JToogen {// 构造记录器,形参是记录器所在的类,表示要在该类做日志private static Logger logger = Logger.getLogger(HelloLog4JToogen.class);/** * @param args*/public static void main(String[] args) {getMessage();}private static void getMessage() {// 记录下各种级别的信息,这些信息放在哪儿,以哪种方式存放,在log4j.properties文件中配置.if (logger.isDebugEnabled()) {logger.debug("This is debug message.");}if (logger.isInfoEnabled()) {logger.info("This is a info message.");}if (logger.isEnabledFor(Level.WARN)) {logger.warn("This is a warn message.");}if (logger.isEnabledFor(Level.ERROR)) {logger.error("This is a error message.....");System.err.println();}}}
log4j.rootLogger=info,stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
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