log4j:WARN No appenders could be found for logger (...)解决办法

今天做项目的时候遇到个问题 ， 导入log4j包后，系统报错log4j:WARN No appenders could be found for logger（...）

后来百度了下  找到解决办法   特此记录下：

在src下面新建file名为log4j.properties内容如下:
# Configure logging for testing: optionally with log file log4j.rootLogger=WARN, stdout # log4j.rootLogger=WARN, stdout, logfile

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