Flutter图片上传java后台接收

最新推荐文章于 2024-09-11 07:36:42 发布

cainiao183

最新推荐文章于 2024-09-11 07:36:42 发布

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分类专栏： flutter 文章标签：上传图片

本文链接：https://blog.youkuaiyun.com/cainiao183/article/details/95057667

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flutter 用的Flutter Dio框架上传的，后台srpingboot 用springmvc和fileupload都没有取到。

最后用servlet自带的取到了上代码：

controller层加@MultipartConfig注解，

取单个图片方法：

Part part = request.getPart("file");
String fileNames = getFileName(part);
String path = writeTo(fileNames,part,nowDate);

private String getFileName(Part part) {
String head = part.getHeader("Content-Disposition");
String fileName = head.substring(head.indexOf("filename=\"")+10, head.lastIndexOf("\""));
return fileName;
}
   private String writeTo(String fileName, Part part,String nowDate)throws IOException {
       String addAndFilename = "/"+"upload" + "/" + nowDate + "/";
       filesPath=filesPath.replace("file:","");
   String finalPath = filesPath + addAndFilename;
   if (!new File(finalPath).exists() || !new File(finalPath).isDirectory()) {
   new File(finalPath).mkdirs();
   }
   InputStream in = part.getInputStream();
       OutputStream out = new FileOutputStream(finalPath+fileName);
       byte[] b = new byte[1024];
       int length = -1;
       while((length = in.read(b))!=-1)
       {
       out.write(b, 0, length);
       }
       in.close();
       out.close();
       return addAndFilename+fileName;
       }

取多个图片：

   Collection<Part> parts = request.getParts();
   if (parts.size()>0) {
       String str="";
       for (Part part : parts) {
           if (part.getName().startsWith("file")) {
               String nowDate = (new Date().getTime()) + "";
           String fileNames = getFileName(part);
       String path = writeTo(fileNames,part,nowDate);
       str+=filesIp+path+",";
               }

       }