来自 andriod,我正在尝试上传图片,我正在 java 中使用网络服务

from andriod i am trying to upload image and i am using web services in java

下面是android部分

new MultipartUploadRequest(this,uploadid,UPLOAD_URL)
                .addFileToUpload(path,"image")
                .addParameter("name",name)
                .setNotificationConfig(new UploadNotificationConfig())
                .setMaxRetries(2)
                .startUpload();

下面是我在 Web 服务中的 java 控制器

@RequestMapping(value = "/uploadm",method=RequestMethod.POST)
public void submitQuestionuploading(@RequestBody String image) throws Exception 
{   
    System.out.println(1+""+image);



        try {


             byte[] bytes = image.getBytes();
             System.out.println(11);
             BufferedOutputStream stream =new BufferedOutputStream(new 
             FileOutputStream(new File(UPLOAD_DIRECTORY +"11.png")));  
             stream.write(bytes);  
             stream.flush();  
             stream.close();
          } 
              catch (Exception e) {
            System.out.println(e);

    } 

输出是我在控制台中得到的,但文件已创建但已损坏且大小为 0 字节,

---------AndroidUploadService1518510071115 Content-Disposition: form-data; name="image"; filename="IMG_20180211_000033.jpg" Content-Type: image/jpeg

ÿØÿá3ØExif

我试着把它放在 java 控制器中,但它不起作用

@RequestMapping(value = "/upload", method = RequestMethod.POST , headers = "Content-Type=multipart/form-data") public String fileUpload(@RequestParam("image") CommonsMultipartFile file) {}

但我只想在spring MVC中做,帮我把上传的文件

这是一个有效的文件上传器

    @ResponseStatus(code = HttpStatus.CREATED)
@RequestMapping(value = "asset", method = RequestMethod.POST, consumes = {
        MediaType.MULTIPART_FORM_DATA_VALUE}, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
@ResponseBody
public String uploadImage(
        @RequestParam("image") MultipartFile file) {
    byte[] bytes = file.getBytes();
    //do something with byte

    return "ok or anything you want to return";
}

而且你还需要将 MultipartResolver 注册为依赖。

@Bean(name = "multipartResolver")
public CommonsMultipartResolver multipartResolver() {
    CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
    multipartResolver.setMaxUploadSize(100000);
    return multipartResolver;
}

您可以部署此代码,然后使用邮递员进行测试。

对此有各种教程。 你可以看看

http://www.baeldung.com/spring-file-upload

https://www.boraji.com/spring-4-mvc-file-upload-example-with-commons-fileupload