{"id":19689,"date":"2024-03-15T19:19:35","date_gmt":"2024-03-15T19:19:35","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/explanation-of-the-configuration-of-conversionpattern-in-log4j\/"},"modified":"2024-03-21T16:18:05","modified_gmt":"2024-03-21T16:18:05","slug":"explanation-of-the-configuration-of-conversionpattern-in-log4j","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/explanation-of-the-configuration-of-conversionpattern-in-log4j\/","title":{"rendered":"Explanation of the configuration of ConversionPattern in log4j"},"content":{"rendered":"

In the log4j configuration file, you can use ConversionPattern to define the format of log output. ConversionPattern is a string that can contain special conversion symbols such as:<\/p>\n

    \n
  1. %m: Log message<\/li>\n
  2. %p: Log level<\/li>\n
  3. %c: the full name of the class to which the log belongs<\/li>\n
  4. %C: Simple name of the class to which the log belongs.<\/li>\n
  5. Thread Name: %t<\/li>\n
  6. Duration since the application was launched (measured in milliseconds)<\/li>\n
  7. %n: Newline character for the platform<\/li>\n
  8. %d: date and time (formatted through SimpleDateFormat)\n

    %d{HH:mm:ss,SSS}: hour:minute:second, millisecond
    \n%d{dd MMM yyyy HH:mm:ss,SSS}: day month year hour:minute:second, millisecond<\/li>\n

  9. Location of the log occurrence<\/li>\n
  10. Percentage sign<\/li>\n<\/ol>\n

    For example, the following is a common ConversionPattern configuration:<\/p>\n

    log4j.appender.ConsoleAppender.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p %c{1}:%L - %m%n\r\n<\/code><\/pre>\n
    In the above setup, %d{yyyy-MM-dd HH:mm:ss} represents the output of date and time, [%t] represents the output of the thread name, %-5p represents the output of the log level (left-aligned, maximum of 5 characters), %c{1} represents the output of the simple name of the class (only showing the first word), %L represents the output of the line number where the log occurred, %m represents the output of the log message, and %n represents a newline character.<\/p>\n
    By using ConversionPattern, you can flexibly define the output format of the logs to meet different requirements.<\/p>\n","protected":false},"excerpt":{"rendered":"
    In the log4j configuration file, you can use ConversionPattern to define the format of log output. ConversionPattern is a string that can contain special conversion symbols such as: %m: Log message %p: Log level %c: the full name of the class to which the log belongs %C: Simple name of the class to which the […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-19689","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nExplanation of the configuration of ConversionPattern in log4j - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/explanation-of-the-configuration-of-conversionpattern-in-log4j\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Explanation of the configuration of ConversionPattern in log4j\" \/>\n<meta property=\"og:description\" content=\"In the log4j configuration file, you can use ConversionPattern to define the format of log output. ConversionPattern is a string that can contain special conversion symbols such as: %m: Log message %p: Log level %c: the full name of the class to which the log belongs %C: Simple name of the class to which the […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/explanation-of-the-configuration-of-conversionpattern-in-log4j\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-15T19:19:35+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-21T16:18:05+00:00\" \/>\n<meta name=\"author\" content=\"Olivia Parker\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Olivia Parker\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/explanation-of-the-configuration-of-conversionpattern-in-log4j\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/explanation-of-the-configuration-of-conversionpattern-in-log4j\/\"},\"author\":{\"name\":\"Olivia Parker\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3ff7b3da0e45ac5dbbef2502f3cea8d9\"},\"headline\":\"Explanation of the configuration of ConversionPattern in log4j\",\"datePublished\":\"2024-03-15T19:19:35+00:00\",\"dateModified\":\"2024-03-21T16:18:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/explanation-of-the-configuration-of-conversionpattern-in-log4j\/\"},\"wordCount\":228,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/explanation-of-the-configuration-of-conversionpattern-in-log4j\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/explanation-of-the-configuration-of-conversionpattern-in-log4j\/\",\"name\":\"Explanation of the configuration of ConversionPattern in log4j - 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