SLF4J requires log4j version 1.2.11 or later - ITeye问答
...version of SLF4J requires log4j version 1.2.12 or later - ...
SLF4J versions 1.4.0 and later requires log4j 1.2.12 or later...
java - "This version of SLF4J requires log4j version 1.2.12" ...