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https://blog.csdn.net/wankunde/article/details/116717895 | ||
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log4j 不推荐使用。原因有以下: | ||
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- 有安全漏洞隐患; | ||
- 功能不如 log4j2 、logback ,log4j 缺失日志删除、压缩等功能; | ||
- 性能不如 log4j2、logback | ||
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--- | ||
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**Appender**: | ||
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- org.apache.log4j.ConsoleAppender(控制台) | ||
- org.apache.log4j.FileAppender(文件), | ||
- **org.apache.log4j.DailyRollingFileAppender**(按照时间产生日志文件), | ||
- **org.apache.log4j.RollingFileAppender**(文件大小到达指定尺寸的时候产生一个新的文件),可通过MaxFileSize、MaxBackupIndex 设置滚动策略 | ||
- org.apache.log4j.WriterAppender(将日志信息以流格式发送到任意指定的地方) | ||
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一般来说,常用的就是**org.apache.log4j.DailyRollingFileAppender** 和 **org.apache.log4j.RollingFileAppender** | ||
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配置: | ||
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```xml | ||
<?xml version="1.0" encoding="UTF-8"?> | ||
<!DOCTYPE log4j:configuration PUBLIC "-//log4j/log4j Configuration//EN" "log4j.dtd"> | ||
<log4j:configuration> | ||
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<!--输出到控制台--> | ||
<appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender"> | ||
<layout class="org.apache.log4j.PatternLayout"> | ||
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss,SSS} [%5p] [%-10t] - %l : %m%n"/> | ||
</layout> | ||
</appender> | ||
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<!--DailyRollingFileAppender 按照每天的日期进行切割--> | ||
<appender name="dailyRollingFileAppender" class="org.apache.log4j.DailyRollingFileAppender"> | ||
<param name="Threshold" value="info"/> | ||
<param name="File" value="./logs/daily_rollingFile_log4j.log"/> | ||
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<param name="DatePattern" value="'.'yyyy-MM-dd-HH-mm'.log'" /> | ||
<layout class="org.apache.log4j.PatternLayout"> | ||
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss,SSS} [%5p] [%-10t] - %l : %m%n"/> | ||
</layout> | ||
</appender> | ||
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<!--RollingFileAppender 按照文件大小或者最大备份量进行切割--> | ||
<appender name="rollingFileAppender" class="org.apache.log4j.RollingFileAppender"> | ||
<param name="Threshold" value="info"/> | ||
<param name="File" value="./logs/rollingFile_log4j.log"/> | ||
<param name="Append" value="true"/> | ||
<param name="MaxFileSize" value="10KB"/> | ||
<param name="MaxBackupIndex" value="5"/> | ||
<layout class="org.apache.log4j.PatternLayout"> | ||
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss,SSS} [%5p] [%-10t] - %l : %m%n"/> | ||
</layout> | ||
</appender> | ||
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<root> | ||
<level value="debug"/> | ||
<appender-ref ref="consoleAppender"/> | ||
<appender-ref ref="dailyRollingFileAppender"/> | ||
<appender-ref ref="rollingFileAppender"/> | ||
</root> | ||
</log4j:configuration> | ||
``` | ||
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```xml | ||
<dependency> | ||
<groupId>log4j</groupId> | ||
<artifactId>log4j</artifactId> | ||
<version>1.2.17</version> | ||
</dependency> | ||
``` | ||
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![](picture/image-20231129163717719.png) | ||
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![](picture/image-20231129175207162.png) | ||
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--- | ||
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参考: | ||
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- 自行实现压缩:[https://blog.csdn.net/qq_42792934/article/details/115962549](https://blog.csdn.net/qq_42792934/article/details/115962549) | ||
- 自定义实现Appender:[https://github.com/foreveryang321/log4j-1x-extras](https://github.com/foreveryang321/log4j-1x-extras) | ||
- log4j扩展插件:[https://blog.csdn.net/wankunde/article/details/116717895](https://blog.csdn.net/wankunde/article/details/116717895) |
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