SSH 文件下载发生异常： Can not find a java.io.InputStream with the name [inputStream] in the invocation sta
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Can not find a java.io.InputStream with the name [inputStream] in the invocation stack. Check the <param name="inputName"> tag specified for this action.
原因:inputStream =null!
解决：
必须参数是fileName=文件名！
window.location.href="dept_down.action?fileName="+pic;
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