Log4j使用

最新推荐文章于 2024-12-24 11:08:19 发布

原创最新推荐文章于 2024-12-24 11:08:19 发布 · 284 阅读

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最近版本的Log4j，使用maven，导入两个jar包，依赖如下：

<dependencies>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.6.2</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.6.2</version>
</dependency>
</dependencies>

然后在自己的resource文件下，新建

log4j.properties,运行不了。

修改依赖文件：

然后就可以了，不同的的版本不一样，新版本的用法要继续学习。

然后配置文件详解：

log4j.rootLogger = INFO, File, stdout rootLogger是设置日志级别和输出端的地方。比如这句，

日志级别是INFO，输出地方WieFile 和 stdout两个地方。

然后在下面要配置输出地方的位置，格式，比如下面：

Here, we use two appenders, one appender to log to a file and another one to log to the console. The first appender uses the org.apache.log4j.FileAppender and the second one the org.apache.log4j.ConsoleAppender. The first appender has a fileattribute, where the logging file is set, whereas the second one has a target attribute which is set to System.out. Both appenders use a layout for their log files. The org.apache.log4j.PatternLayout is used and the ConversionPattern is set to%d{dd/MMM/yyyy HH:mm:ss,SSS}- %c{1}: %m%n:

%d{dd/MMM/yyyy HH:mm:ss,SSS} is used to set the date pattern, %c{1} is used to print the class name, %m to print the message, and %n to leave an empty line.

log4j.appender.File=org.apache.log4j.FileAppender
log4j.appender.File.File=C:\\logs\\logs.log
log4j.appender.File.layout=org.apache.log4j.PatternLayout
log4j.appender.File.layout.conversionPattern=%d{dd/MMM/yyyy HH:mm:ss,SSS}- %c{1}: %m%n

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=%d{dd/MMM/yyyy HH:mm:ss,SSS}- %c{1}: %m%n