java - Exclude javax.servlet package from com.google.gwt dependency on pom.xml -

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i use vaadin 7, , vaadin have default package javax.servlet , need com.google.gwt in dependencies contains javax.servlet. when run application got error : 

severe: allocate exception servlet vaadin application servlet java.lang.classcastexception: com.vaadin.server.vaadinservlet cannot cast javax.servlet.servlet

now want exclude javax.servlet dependency, , here tried far : 

<dependency> <groupid>com.google.gwt</groupid> <artifactid>gwt-user</artifactid> <version>2.6.1</version>   <exclusions>     <exclusion>  <!-- declare exclusion here -->       <groupid>javax.servlet</groupid>       <artifactid>servlet-api</artifactid>     </exclusion>   </exclusions> </dependency>

and :

<build> <plugins> <plugin>       <groupid>org.apache.maven.plugins</groupid>       <artifactid>maven-shade-plugin</artifactid>       <version>2.3</version>       <executions>         <execution>           <phase>package</phase>           <goals>             <goal>shade</goal>           </goals>           <configuration>             <filters>               <filter>                 <minimizejar>true</minimizejar>                 <artifact>com.google.gwt:gwt-user</artifact>                 <includes>                   <include>com/google/**</include>                 </includes>                 <excludes>                   <exclude>javax/servlet/**</exclude>                   <exclude>javax/servlet/http/**</exclude>                   <exclude>javax/servlet/resources/**</exclude>                 </excludes>               </filter>             </filters>           </configuration>         </execution>       </executions>     </plugin>  <plugin>

but both didn't work !. help!

i think want gwt-servlet dependency rather gwt-user.

that said, don't know vaadin; maybe there's com.vaadin dependency contains gwt classes?


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