el-upload :data 后台中文乱码

:data="uploadFileRelationData"
:action="/admin/sys-file/uploadfile"

@PostMapping(value = "/uploadfile")
	public R uploadFile(@RequestPart("file") MultipartFile file,
						BnFileBusinessRelation bnFileBusinessRelation) {

		return sysFileService.uploadFile(file, bnFileBusinessRelation);
	}

new String(file.getOriginalFilename().getBytes("ISO-8859-1"),"utf-8")
new String(bnFileBusinessRelation.getBusinessTypeName().getBytes("ISO-8859-1"),"utf-8")