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FileUploadException: the request was rejected beca

前端上传文件报错FileUploadException: the request was rejected because no multipart boundary was found
更新时间：2025-07-01 15:49:59
分类： vue
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前端上传文件，后端用springboot接收，报错FileUploadException: the request was rejected because no multipart boundary was found

问题如下：

前端发送请求时设置了

language 复制代码 
option['Content-Type'] = 'multipart/form-data';

此时Content-Type缺少boundary，无法确定数据边界，导致后端接收不到文件此处不指定Content-Type，交给浏览器自主增加得到如下结果为正常可进行上传

language 复制代码 
multipart/form-data; boundary=----WebKitFormBoundaryLwQvS8MZ9mGtxrfH
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