eclipse中Maven项目pom.xml报错:com.thoughtworks.xstream.io.HierarchicalStreamDriver

    <plugins>    
        <plugin>    
            <groupId>org.apache.maven.plugins</groupId>    
            <artifactId>maven-war-plugin</artifactId>    
            <version>2.6</version>    
            <configuration>    
                <webResources>    
                    <resource>    
                        <directory>src/main/webapp/WEB-INF</directory>    
                        <filtering>true</filtering>    
                        <targetPath>WEB-INF</targetPath>    
                    </resource>    
                </webResources>    
            </configuration>    
        </plugin>    
    </plugins> 

<dependency> 
    <groupId>com.thoughtworks.xstream</groupId> 
    <artifactId>xstream</artifactId> 
    <version>1.4.9</version> 
</dependency>