使用log4j打印不出日志时,开启控制台权限就可以了;

log4j:ERROR Could not find value for key log4j.appender.error

log4j:ERROR Could not instantiate appender named "error". log4j:ERROR Could not find value for key log4j.appender.file log4j:ERROR Could not instantiate appender named "file".

 

配置内容:

 

#1，日志输入到控制台 log4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.Encoding=utf-8log4j.appender.stdout.Threshold=ALLlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%-5p\: %d{ISO8601}\: %C{1}[line\:%L}\: %m%n