java.lang.ClassNotFoundException: org.slf4j.impl.StaticLoggerBinder

[Sebastian E. Ovide]

Hi Guys,

I'm getting started with Shiro in a maven project. I've added the filter (as
http://shiro.apache.org/web.html) and the dependencies:

      <!-- Apache Shiro -->
      <dependency>
          <groupId>org.apache.shiro</groupId>
          <artifactId>shiro-core</artifactId>
          <version>${shiroVersion}</version>
      </dependency>

      <dependency>
          <groupId>org.apache.shiro</groupId>
          <artifactId>shiro-web</artifactId>
          <version>${shiroVersion}</version>
      </dependency>

I'm getting this error:

HTTP Status 500 -
------------------------------

*type* Exception report

*message*

*description*The server encountered an internal error () that prevented it
from fulfilling this request.

*exception*

javax.servlet.ServletException: PWC1243: Filter execution threw an exception

*root cause*

java.lang.NoClassDefFoundError: org/slf4j/impl/StaticLoggerBinder

*root cause*

java.lang.ClassNotFoundException: org.slf4j.impl.StaticLoggerBinder


ideas ?
-- 
Sebastian E. Ovide