摘要： 今天在用struts2就行文件下载时出现如下错误：Servlet.service()forservletdefaultthrewexception java.lang.IllegalArgumentException:Cannotfindajava.io.InputStreamwiththename[imageStream]intheinvocationstack.Checkthe<paramname="inputName">tagspecifiedforthisaction. atorg.apache.struts2.dispatcher.StreamResu 阅读全文