NoClassDefFoundError org/apache/thrift/protocol/TProtocolFactory

[??????]

hi,
  
     I'm using thrift 0.9.1 and build a java project with maven. It packages 
the project well but when I run the project, it throws an exception: Exception 
in thread "main" java.lang.NoClassDefFoundError: 
org/apache/thrift/protocol/TProtocolFactory
  
    The command line I ran the program is : java -cp 
target/simple_proxy-1.0-SNAPSHOT.jar com.xx.App
  
     and the full stack list is:
  
 Exception in thread "main" java.lang.NoClassDefFoundError: 
org/apache/thrift/protocol/TProtocolFactory
Caused by: java.lang.ClassNotFoundException: 
org.apache.thrift.protocol.TProtocolFactory
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
  
 Related maven dependency is:
     <dependency>
      <groupId>org.apache.thrift</groupId>
      <artifactId>libthrift</artifactId>
      <version>0.9.1</version>
    </dependency>
  
 Can anyone help me? Thanks.