log4j:WARN No appenders could be found for logger

阿新 • • 發佈：2018-09-03

you lips ffffff 導入 ips ogg console shadow pattern

Eclipse 用Spring導入技術分享圖片

這幾個文件都正常，可是寫簡單的代碼輸出HelloWorld,運行就出現下面的錯誤：
技術分享圖片

解決這問題是在src下新建log4j.properties文件
技術分享圖片

在這文件寫入下面代碼：
log4j.rootLogger=DEBUG, CONSOLE

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p [%t] %10l - %m%n

##log4j.appender.FILE=org.apache.log4j.RollingFileAppender
##log4j.appender.FILE.File=E:/logs/log4j.log
##log4j.appender.FILE.MaxFileSize=1MB
##log4j.appender.FILE.Append = true
##log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
##log4j.appender.FILE.layout.ConversionPattern=%d{yyyy/MM/dd/HH:mm:ss} %-5p [%t] %10l - %m%n

技術分享圖片
這樣就OK了。

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log4j:WARN No appenders could be found for logger

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