struts2中怪异问题FileUploadInterceptor拦截器失效。多文件上传中限制文件类
有个问题相当迷茫，在上传多文件的时候配置了限制文件类型和大小，，然后传个错误类型文件，后台能够截获文件类型不匹配，且大小过大，可是奇怪的是，居然执行结果文件还是上传上去了。（同样的配置方式上传单个文件能够截获类型，大小错误，且能正确返回到input指定页面，唯独这在执行多文件上传时候后台截获了可是返回了上传成功页面，且文件成功上传上去了）
下面是后台信息：（中文处为显示调试打印信息）
严重: File too large: filedata "upload_43039390_11a342c434b__8000_00000000.tmp" 3894389
2008-5-29 18:14:55 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: Could not find property [struts]
2008-5-29 18:14:55 com.opensymphony.xwork2.util.logging.commons.CommonsLogger error
严重: Content-Type not allowed: filedata "upload_43039390_11a342c434b__8000_00000001.tmp" application/msword
2008-5-29 18:14:55 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: Could not find property [struts]
2008-5-29 18:14:55 com.opensymphony.xwork2.util.logging.commons.CommonsLogger error
严重: Content-Type not allowed: filedata "upload_43039390_11a342c434b__8000_00000002.tmp" application/octet-stream
file is :\tmp\upload_43039390_11a342c434b__8000_00000000.tmp fileName:opera.exe fileType:application/octet-stream
file is :\tmp\upload_43039390_11a342c434b__8000_00000001.tmp fileName:application base.doc fileType:application/msword
file is :\tmp\upload_43039390_11a342c434b__8000_00000002.tmp fileName:11.rar fileType:application/octet-stream
------------执行文件上传中--------
文件上传路径：
:\Java\apache-tomcat-5.5.20\webapps\strutsstudy\WEB-INF\webfile/opera.exe
接收到的文件file is :0--\tmp\upload_43039390_11a342c434b__8000_00000000.tmp
开始执行上传第 0个文件
第 0个文件上传结束
------------执行文件上传中--------
文件上传路径：:\Java\apache-tomcat-5.5.20\webapps\strutsstudy\WEB-INF\webfile/application base.doc
接收到的文件file is :1--\tmp\upload_43039390_11a342c434b__8000_00000001.tmp
开始执行上传第 1个文件
第 1个文件上传结束
------------执行文件上传中--------
文件上传路径：:\Java\apache-tomcat-5.5.20\webapps\strutsstudy\WEB-INF\webfile/11.rar
接收到的文件file is :2--\tmp\upload_43039390_11a342c434b__8000_00000002.tmp
开始执行上传第 2个文件
第 2个文件上传结束
2008-5-29 18:14:55 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: Could not find property [org.apache.catalina.jsp_file]
2008-5-29 18:14:56 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
-------------------------------------------------------
我的action的配置：
<action name="upmany" class="com.study.web.action.UploadManyFilesAction">
<interceptor-ref name="fileUpload">
<param name="allowedTypes">text/plain </param>
<param name="maximumSize">2731088 </param>
</interceptor-ref>
<interceptor-ref name="defaultStack"> </interceptor-ref>
<result name="suc">/WEB-INF/jsp/test/suc.jsp </result>
<result name="input">/WEB-INF/jsp/test/htmlUpload.jsp </result>
<result name="err">/WEB-INF/jsp/test/err.jsp </result>
</action>
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问题解决：
原因忘了继承ActionSupport类
