问题描述
提示：这里描述项目中遇到的问题：
这是个SSM项目，以前经常遇到这个问题，今天有幸记录下来
[ERROR][o.a.s.r.StreamResult] Can not find a java.io.InputStream with the name [downLoadFile] in the invocation stack. Check the <param name="inputName"> tag specified for this action is correct, not excluded and accepted.
[ERROR][o.a.s.d.DefaultDispatcherErrorHandler] Exception occurred during processing request: Can not find a java.io.InputStream with the name [downLoadFile] in the invocation stack. Check the <param name="inputName"> tag specified for this action is correct, not excluded and accepted.
java.lang.IllegalArgumentException: Can not find a java.io.InputStream with the name [downLoadFile] in the invocation stack. Check the <param name="inputName"> tag specified for this action is correct, not excluded and accepted.
解决方案：
原因没记住，直接说解决方案
首先在IDEA配置的Tomcat 的部署里面加上项目的ROOT路径
其次选择文件→项目结构
在项目文件里面选择工件，选择war exploded那个，在输出目录里面选择tomcat的文件夹，选择webapps文件夹，在里面新建个文件，名字就是localhost后面的地址
