如何为不同的appenders配置log4j

Question

我尝试为不同的输出层配置log4j.properties。

例如：

• 仅在控制台WARN级别显示
• 将INFO级别写入日志文件

我试图找到正确的解决方案。我发现，当你写一些关于你想要的包的信息级别为：

log4j.logger.your.package.name=调试

它将调试记录程序打印到控制台和文件中。

此处log4j.properties:的内容

# Root logger option
log4j.rootLogger=WARN, stdout, file 
# Direct log messages to stdout
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{ABSOLUTE} %5p %t %c{1}:%M:%L - %m%n 
# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.file=logs/myapp_test.log
log4j.appender.file.MaxFileSize=2MB
log4j.appender.file.MaxBackupIndex=1
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.conversionPattern=%d{ABSOLUTE} %5p %t %c{1}:%M:%L - %m%n 
log4j.logger.com.my.lab=DEBUG

• 如何为文件和控制台配置不同的输出层

Answer 1

您可以为File&作为的控制台附件

# Root logger option
log4j.rootLogger=INFO, stdout, file 
# Direct log messages to stdout
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{ABSOLUTE} %5p %t %c{1}:%M:%L - %m%n 
# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.file=logs/myapp_test.log
log4j.appender.file.MaxFileSize=2MB
log4j.appender.file.MaxBackupIndex=1
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.conversionPattern=%d{ABSOLUTE} %5p %t %c{1}:%M:%L - %m%n 

# Set the logger level of Console Appender to WARN
log4j.appender.stdout.Threshold = WARN

也可以参考这个链接

Answer 2

您可以定义一个阈值：

# Root logger option
log4j.rootLogger=INFO, stdout, file 
# Direct log messages to stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Threshold = WARN
log4j.appender.stdout.target=System.out 
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.conversionPattern=%d{ABSOLUTE} %5p %t %c{1}:%M:%L - %m%n 
# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.file=logs/myapp_test.log
log4j.appender.file.MaxFileSize=2MB
log4j.appender.file.MaxBackupIndex=1
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.conversionPattern=%d{ABSOLUTE} %5p %t %c{1}:%M:%L - %m%n 
log4j.logger.com.my.lab=DEBUG