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
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");
}
}
log4j.properties 文件
### log4j.properties 文件
### 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