java - 将图像上传到服务器(Java)

Question

我想从客户端接收图像并将其保存到文件夹中。当我从 POST-MAN 收到它时它只生成字节:

ˇÿˇ‡ JFIF H H ˇ· XExif MM * ái & † † † ± ˇÌ 8Photoshop 3.0 8BIM 8BIM % ‘ åŸè ≤ ÈÄ òϯB~ˇ¿ ± " ˇƒ 

没关系，我可以接收并保存。

但是当我尝试从 IOS 接收时，它还会在正文中向我发送一些信息:

--Boundary+71ADC8832D9A5F95
Content-Disposition: form-data; name="file"; filename="fileName.jpg"
Content-Type: image/jpeg

ˇÿˇ‡ JFIF H H ˇ· XExif MM * ái & † † † ± ˇÌ 8Photoshop 3.0 8BIM 8BIM % ‘ åŸè ≤ ÈÄ òϯB~ˇ¿ ± " ˇƒ 

如何从中获取唯一的图像？

我的Java代码是:

InputStream stream = request.getInputStream();
bytes = IOUtils.toByteArray(stream);
File file = new File("myfile/1.jpg");
BufferedImage img = ImageIO.read(new ByteArrayInputStream(bytes));
ImageIO.write(img, "JPEG", file);

更新:对于分段上传图像，我添加了代码:

if(request instanceof MultipartHttpServletRequest){
    /**
     * multipart
     */
    MultipartHttpServletRequest mrequest = (MultipartHttpServletRequest) request;
    Iterator<String> itr =  mrequest.getFileNames();
    MultipartFile file = mrequest.getFile(itr.next());
    bytes = file.getBytes();
}

但它不是 MultipartHttpServletRequest 的实例。为什么？

Answer 1

我找到了解决方案:

spring和tomcat配置问题...我已经添加了

<Context
   allowCasualMultipartParsing="true" /> 

在tomcat的server.xml中。

然后将bean添加到WebConfig:

@Bean
public MultipartResolver multipartResolver() {
    CommonsMultipartResolver resolver = new CommonsMultipartResolver();
    resolver.setDefaultEncoding("utf-8");
    return resolver;
}