还是古老的SpringMVC，上传文件报错，盼解答java.io.IOException: UT000020: Connection terminated as request was larger than 10485760
https://blog.csdn.net/qq_31122833/article/details/81235206
异常意思是上传文件大小超过10485760，先试试上传非常小的文件，如果可以上传，直接把maxUploadSize的值继续调大即可