slf4j-api-1.6.6.jar slf4j-log4j12-1.7.5.jar slf4j-simple-1.7.7.jar

在使用到log4j和slf4j的同時slf4j-api-1.6.6.jar依賴的兩個jar包也必須同時依賴，故加入以下依賴即可：

<dependency>
	<groupId>org.slf4j</groupId>
	<artifactId>slf4j-api</artifactId>
	<version>1.6.0</version>
</dependency>
<dependency>
	 <groupId>org.slf4j</groupId>
	 <artifactId>slf4j-simple</artifactId>
	 <version>1.7.7</version>
 </dependency>
  <dependency>
	 <groupId>org.slf4j</groupId>
	 <artifactId>slf4j-log4j12</artifactId>
	 <version>1.7.25</version>
 </dependency>
  <dependency>
	<groupId>log4j</groupId>
	<artifactId>log4j</artifactId>
	<version>1.2.16</version>
</dependency>