2018年5月27日
一、入门log4j实例
1.1 下载解压log4j.jar(地址:http://mirrors.hust.edu.cn/apache/logging/log4j/2.11.0/)
1.2 新建工程,导入jar包
1.3 Log4jTest.java:
package test6; import org.apache.log4j.Logger; /** * @author mmb * @function test log4j * */ public class Log4jTest { private static Logger logger = Logger.getLogger(Log4jTest.class); public static void main(String [] args){ //BasicConfigurator.configure(); //自动快速地使用缺省Log4j环境。 logger.info("aaaa"); logger.debug("bbbb"); logger.error("cccc"); } }
1.4 log4j.properties
### 设置### log4j.rootLogger = debug,stdout,D,E ### 输出信息到控制抬 ### log4j.appender.stdout = org.apache.log4j.ConsoleAppender log4j.appender.stdout.Target = System.out log4j.appender.stdout.layout = org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n ### 输出DEBUG 级别以上的日志到=E://logs/error.log ### log4j.appender.D = org.apache.log4j.DailyRollingFileAppender log4j.appender.D.File = E://logs/log.log log4j.appender.D.Append = true log4j.appender.D.Threshold = DEBUG log4j.appender.D.layout = org.apache.log4j.PatternLayout log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n ### 输出ERROR 级别以上的日志到=E://logs/error.log ### log4j.appender.E = org.apache.log4j.DailyRollingFileAppender log4j.appender.E.File =E://logs/error.log log4j.appender.E.Append = true log4j.appender.E.Threshold = ERROR log4j.appender.E.layout = org.apache.log4j.PatternLayout log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n
1.5 输出
二、log4j 详细配置
参考blog:https://blog.csdn.net/azheng270/article/details/2173430/