Struts2-Maven在eclipse IDE中

我已将此Struts2-maven项目导入到Eclipse中 .

这是Struts2的 pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>manning</groupId>
<artifactId>Form_Tags_Struts2_Mvn</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>Form_Tags_Struts2_Mvn</name>
<build>
    <finalName>Form_Tags_Struts2_Mvn</finalName>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <dependency>
        <groupId>com.sun</groupId>
        <artifactId>tools</artifactId>
        <version>1.7.0_05</version>
        <scope>system</scope>
        <systemPath>/usr/lib/jvm/jdk1.7.0_05/lib/tools.jar</systemPath>
    </dependency>
    <dependency>
        <groupId>org.apache.struts</groupId>
        <artifactId>struts2-core</artifactId>
        <version>2.3.1.2</version>
    </dependency>
        </dependencies>
<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

但是当我尝试运行它时会显示异常 . 这是我的例外：

SEVERE：在org.apache的org.apache.catalina.loader.WebappClassLoader.loadClass（WebappClassLoader.java:1714）中启动过滤器struts2 java.lang.ClassNotFoundException：org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter的异常 . catalina.loader.WebappClassLoader.loadClass（WebappClassLoader.java:1559）org.apache.catalina.core.DefaultInstanceManager.loadClass（DefaultInstanceManager.java:532）org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged（DefaultInstanceManager.java： 514）org.apache.catalina.core.DefaultInstanceManager.newInstance（DefaultInstanceManager.java:133）atg.apache.catalina.core.ApplicationFilterConfig.getFilter（ApplicationFilterConfig.java:256）org.apache.catalina.core.ApplicationFilterConfig .setFilterDef（ApplicationFilterConfig.java:382）位于org.apache的org.apache.catalina.core.ApplicationFilterConfig . （ApplicationFilterConfig.java:103）org.apache.catalina.core.StandardContext.filterStart（StandardContext.java:4650） . catalina.core.StandardContext.startInternal（StandardContext.java:5306）org.apache.catalina.util.LifecycleBase.start（LifecycleBase.java:150）at org.apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase . java：1559）atg.apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase.java:1549）at java.util.concurrent.FutureTask $ Sync.innerRun（FutureTask.java:334）at java.util.concurrent .futureTask.run（FutureTask.java:166）位于java的java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1110）java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:603） . lang.Thread.run（Thread.java:722）

谁能帮帮我吗？实际发生了什么？