Eclipse打印不出日誌，在控制檯上只顯示

• 1.執行列印擷取(WARN)
• 2.解決

1.執行列印擷取(WARN)

1.log4j:WARN No appenders could be found for logger (org.apache.hadoop.util.Shell).  
2.log4j:WARN Please initialize the log4j system properly.  
3.log4j:WARN See http://logging.
 
apache.org/log4j/1.2/faq.html#noconfig for more info.

2.解決

1.在專案的src/main/resources目錄下，新建一個檔案，命名為“log4j.properties”，在檔案中寫入如下內容：

log4j.rootLogger=INFO, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n
log4j.appender.logfile=org.apache.log4j.FileAppender
log4j.appender.logfile.File=target/spring.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d %p [%c] - %m%n
 

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