{"id":13231,"date":"2024-03-15T06:38:56","date_gmt":"2024-03-15T06:38:56","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/an-in-depth-explanation-of-log4j-properties-configuration\/"},"modified":"2025-08-05T14:22:14","modified_gmt":"2025-08-05T14:22:14","slug":"an-in-depth-explanation-of-log4j-properties-configuration","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/an-in-depth-explanation-of-log4j-properties-configuration\/","title":{"rendered":"log4j.properties Configuration Guide"},"content":{"rendered":"

The log4j.properties file is the configuration file for log4j. By configuring this file, you can control the logging behavior of log4j.<\/p>\n

The format of the log4j.properties file is as follows:<\/p>\n

# Global logging configuration\r\nlog4j.rootLogger=level, appenderName\r\n\r\n# Appender configuration\r\nlog4j.appender.appenderName=appenderClass\r\nlog4j.appender.appenderName.property1=value1\r\nlog4j.appender.appenderName.property2=value2\r\n...\r\n\r\n# Logger configuration\r\nlog4j.logger.loggerName=level, appenderName\r\n\r\n# Property configuration\r\nlog4j.property.propertyName=value\r\n<\/code><\/pre>\n
The following provides a detailed explanation of commonly used configuration items in the configuration file.<\/p>\n
    \n
  1. Setting up logging parameters globally<\/li>\n
  2. log4j.rootLogger: Sets the global root log level and root log output destination.<\/li>\n
  3. Configuration for adding something onto.<\/li>\n
  4. Specify the name of an appender.<\/li>\n
  5. configures properties of the appender<\/li>\n
  6. Logging setup:<\/li>\n
  7. log4j.logger.loggerName: Specifies the name of a logger.<\/li>\n
  8. Configure the logger’s log level and output destination using the format log4j.logger.loggerName=level, appenderName.<\/li>\n
  9. Arrangement of property configuration.<\/li>\n
  10. log4j.property.propertyName=value: Configures a custom property for log4j.<\/li>\n<\/ol>\n
    There are several commonly used appenders:<\/p>\n
      \n
    1. ConsoleAppender: Output logs to the console.<\/li>\n
    2. FileAppender: output the log to a file.<\/li>\n
    3. DailyRollingFileAppender: Generates a log file every day.<\/li>\n
    4. RollingFileAppender creates a new log file when the current log file reaches a certain size threshold.<\/li>\n<\/ol>\n
      There are several commonly used log levels:<\/p>\n
        \n
      1. DEBUG: The lowest level of logging, used for debugging purposes.<\/li>\n
      2. INFO: Used to display the running status of the program.<\/li>\n
      3. WARNING: Used for displaying warning messages.<\/li>\n
      4. ERROR: Used to display error messages.<\/li>\n
      5. FATAL: The highest level of logging used to output severe errors.<\/li>\n<\/ol>\n
        In addition to the configuration options mentioned above, log4j also supports various other configuration options that can be adjusted according to specific needs.<\/p>\n","protected":false},"excerpt":{"rendered":"
        The log4j.properties file is the configuration file for log4j. By configuring this file, you can control the logging behavior of log4j. The format of the log4j.properties file is as follows: # Global logging configuration log4j.rootLogger=level, appenderName # Appender configuration log4j.appender.appenderName=appenderClass log4j.appender.appenderName.property1=value1 log4j.appender.appenderName.property2=value2 … # Logger configuration log4j.logger.loggerName=level, appenderName # Property configuration log4j.property.propertyName=value The following provides […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[3323,3320,17561,17563,17562],"class_list":["post-13231","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-java-logging","tag-log4j-configuration","tag-log4j-properties","tag-log4j-tutorial","tag-logging-setup"],"yoast_head":"\nlog4j.properties Configuration Guide - 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