使用Log4j

引入Log4j依赖

<dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>1.2.17</version>
</dependency>

配置文件

新建一个log4j.properties文件，文件存放位置：

文件内容如下：

log4j.rootLogger=DEBUG, Console ,File  

#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender  
log4j.appender.Console.layout=org.apache.log4j.PatternLayout  
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n

#File
log4j.appender.File = org.apache.log4j.FileAppender
log4j.appender.File.File = E://myLog.log
log4j.appender.File.layout = org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern =%d [%t] %-5p [%c] - %m%n

Java代码

import org.apache.log4j.Logger;

/**
 * @author LeDao
 * @company
 * @create 2021-06-21 12:38
 */
public class Test {

    private static final Logger logger = Logger.getLogger(Test.class);

    public static void main(String[] args) {
        logger.info("调试信息");
        logger.error("错误信息");
    }
}