限制struts2上传类型和大小

    <action name="upload"  class="UploadAction">    <interceptor-ref name="defaultStack"><!-- 配置允许上传的文件类型，多个用","分隔--><param name="fileUpload.allowedTypes">application/msword,application/pdf,application/zip</param> <!-- 配置允许上传的文件大小，单位字节 --><param name="fileUpload.maximumSize">10485760</param></interceptor-ref><result name="input">error.jsp</result>    <result name="success">index.jsp</result>    </action>