**1.報錯SLF4J: Failed to load class
![shiro1](https://img-blog.csdn.net/20160928143715909)
*解決方法*
self4j的包沒有添加完成,另外這個jar包還依賴其他jar包纔可以,引入其他self4j的jar包(slf4j-log4j12-1.7.7.jar)即可解決。
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.21</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.21</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>