commons-attributes-compiler.jar: Required extension qdox not found

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commons-attributes-compiler.jar: Required extension qdox not found

报这个错commons-attributes-compiler.jar: Required extension qdox not found怎么办？ 
我们使用MyEclipse开发基于Spring2.0的web应用时，如果部署应用到Tomcat可能会出现commons-attributes-compiler.jar]: Required extension qdox not found错误。如下： 
程序代码 
INFO: Deploying web application archive GRCC.war 
Sep 14, 2007 13:22:18 AM org.apache.catalina.util.ExtensionValidator validateManifestResources 
INFO: ExtensionValidator[/GRCC][commons-attributes-api.jar]: Required extension "ant" not found. 
Sep 14, 2007 13:22:18 AM org.apache.catalina.util.ExtensionValidator validateManifestResources 
INFO: ExtensionValidator[/GRCC][commons-attributes-compiler.jar]: Required extension "ant" not found. 
Sep 14, 2007 13:22:18 AM org.apache.catalina.util.ExtensionValidator validateManifestResources 
INFO: ExtensionValidator[/GRCC][commons-attributes-compiler.jar]: Required extension "javadoc" not found. 
Sep 14, 2007 13:22:18 AM org.apache.catalina.util.ExtensionValidator validateManifestResources 
INFO: ExtensionValidator[/GRCC]: Failure to find 3 required extension(s). 
   Sep 14, 2007 13:22:18 AM org.apache.catalina.core.StandardContext start 
SEVERE: Error getConfigured 
Sep 14, 2007 13:22:18 AM org.apache.catalina.core.StandardContext start 
SEVERE: Context [/GRCC startup failed due to previous errors 
Sep 14, 2007 13:22:18 AM org.apache.catalina.core.StandardContext stop 
INFO: Container org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/GRCC] has not been started 
原因在于commons-attributes-compiler.jar包的MANIFEST.MF文件出现问题，如果对这个包没有依赖，直接删除这个包的引用，项目就可以正常启动，如果对这个包有依赖，那么可以通过以下两种方式来解决。 

1、修改MANIFEST.MF文件 
原compiler.jar包中的MF文件结构 
程序代码 
Manifest-Version: 1.0 
Ant-Version: Apache Ant 1.5.3 
Created-By: Apache Maven 
Built-By: hen 
Package: org.apache.commons.attributes 
Build-Jdk: 1.4.2_05 
Extension-Name: commons-attributes-api 
Specification-Title: Client API for Jakarta Commons Attributes. 
Specification-Vendor: The Apache Software Foundation 
Implementation-Title: org.apache.commons.attributes 
Implementation-Vendor: The Apache Software Foundation 
Implementation-Version: 2.2 
Extension-List: ant qdox 
ant-Extension-Name: ant 
ant-Implementation-Version: 1.5 
ant-Implementation-URL: http://www.ibiblio.org/maven/ant/jars/ant-1.5. 
jar 
qdox-Extension-Name: qdox 
qdox-Implementation-Version: 1.5 
qdox-Implementation-URL: http://www.ibiblio.org/maven/qdox/jars/qdox-1 
.5.jar 
Implementation-Vendor-Id: org.apache 
X-Compile-Source-JDK: 1.4 
X-Compile-Target-JDK: 1.4 
我们可以看到URL后面的地址中含有一些不必要的字符，将MF文件修改如下 
程序代码 
Manifest-Version: 1.0 
Ant-Version: Apache Ant 1.5.3 
Created-By: Apache Maven 
Built-By: hen 
Package: org.apache.commons.attributes 
Build-Jdk: 1.4.2_05 
Extension-Name: commons-attributes-api 
Specification-Title: Client API for Jakarta Commons Attributes. 
Specification-Vendor: The Apache Software Foundation 
Implementation-Title: org.apache.commons.attributes 
Implementation-Vendor: The Apache Software Foundation 
Implementation-Version: 2.2 
Extension-List: ant qdox 
ant-Extension-Name: ant 
ant-Implementation-Version: 1.5 
ant-Implementation-URL: http://www.ibiblio.org/maven/ant/jars/ant-1.5.jar 
qdox-Extension-Name: qdox 
qdox-Implementation-Version: 1.5 
qdox-Implementation-URL: http://www.ibiblio.org/maven/qdox/jars/qdox-1.5.jar 
Implementation-Vendor-Id: org.apache 

X-Compile-Source-JDK: 1.4 
X-Compile-Target-JDK: 1.4 

这个问题就可以解决。 

2、替换compiler.jar包