1、idea安装插件lombok
file -> settings -> plugins, 这里需要安装完成后,重启idea
2、引入jar包
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.20</version> <!-- 版本自选 -->
</dependency>
<!-- 如果非spring工程,需要引入一下jar -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.21</version>
</dependency>
3、测试
4、添加 log4j.properties 文件
添加到resources文件目录下
文件内容:
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