文件類型轉換錯誤cannot be cast to org.springframework.web.multipart.MultipartHttpServletRequest

文件類型轉換錯誤

原文請移步

 MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest)(request);

空文件上傳會出現類型轉換錯誤
做一步處理

MultipartHttpServletRequest multipartRequest =null;
if (request instanceof MultipartHttpServletRequest) {
multipartRequest = (MultipartHttpServletRequest)(request);
}

先判斷httpRequest 是否含有文件類型 ,若含文件，則將httpRequest 轉換為MultipartHttpServletRequest類型。