问前端获取java后台预签名后上传图片报错？

前端获取java后台预签名后上传图片浏览器总是报错：

<Error>

<Code>SignatureDoesNotMatch</Code>

<Message>The Signature you specified is invalid.</Message>

<StringToSign>sha1 1611825381;1611825561 9f2973f55f8a5c42071d68c7b7211621ec4d1cb1 </StringToSign>

<FormatString>get /1611825390400tt.jpeg host=aimoee-1300657407.cos.ap-beijing.myqcloud.com </FormatString>

<Resource>aimoee-1300657407.cos.ap-beijing.myqcloud.com/1611825390400tt.jpeg</Resource>

<RequestId>NjAxMjgwZThfZGNjODJhMDlfMWUzOWJfMzY2OTZmZg==</RequestId>

<TraceId>OGVmYzZiMmQzYjA2OWNhODk0NTRkMTBiOWVmMDAxODc0OWRkZjk0ZDM1NmI1M2E2MTRlY2MzZDhmNmI5MWI1OTQyYWVlY2QwZTk2MDVmZDQ3MmI2Y2I4ZmI5ZmM4ODFjNzgzOTgwNzViNjMzYmIzOWU0OGIzNDBiMjIxNTkwZTk=</TraceId>

</Error>