Java 将文件上传到 api 端点

Question

所以我正在尝试以二进制格式将文件上传到 imgur 的 endpoint。 api 需要将文件映射到 image 键，但我正在努力弄清楚如何做到这一点。

如何实现？

编辑：我尝试使用 this post 的摘录，但无法正常工作。

Answer 1

试试上面的例子。是 from visualsearchapi.com。祝你好运。

public static String simSearchByImg(File file,int  catid ,String subject,String labeland,String labelor,String labelnot) throws IOException{
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String result =null;
        try {
            HttpPost httppost = new HttpPost("http://api0.visualsearchapi.com:8084/vsearchtech/api/v1.0/apisim_search");

            FileBody bin = new FileBody(file);
            StringBody catidBody = new StringBody(catid+"" , ContentType.TEXT_PLAIN);
            StringBody keyBody = new StringBody(APPKEY , ContentType.TEXT_PLAIN);
            StringBody langBody = new StringBody(LANG , ContentType.TEXT_PLAIN);
            StringBody fmtBody = new StringBody(FMT , ContentType.TEXT_PLAIN);
            MultipartEntityBuilder builder = MultipartEntityBuilder.create();
            builder.addPart("apikey", keyBody)
            .addPart("photo", bin)
            .addPart("catid", catidBody)
            .addPart("lang", langBody)
            .addPart("fmt", fmtBody);
            if(subject != null && subject.isEmpty() == false){
                 StringBody subjectBody = new StringBody(subject, Charset.forName("UTF-8"));
                 builder.addPart("subject", subjectBody);
            } 
            if(labeland != null && labeland.isEmpty() == false){
                 StringBody labelandBody = new StringBody(labeland , ContentType.TEXT_PLAIN);
                 builder .addPart("labeland", labelandBody);
            }
            if(labelor != null && labelor.isEmpty() == false){
                 StringBody labelorBody = new StringBody(labelor , ContentType.TEXT_PLAIN);
                 builder .addPart("labelor", labelorBody);
            }
            if(labelnot != null && labelnot.isEmpty() == false){
                 StringBody labelnotBody = new StringBody(labelnot , ContentType.TEXT_PLAIN);
                 builder .addPart("labelnot", labelnotBody);
            }
            HttpEntity reqEntity =  builder.build();
            httppost.setEntity(reqEntity);
            response = httpClient.execute(httppost);
            HttpEntity resEntity = response.getEntity();
            if (resEntity != null) {
               // result = ConvertStreamToString(resEntity.getContent(), "UTF-8");
                String charset = "UTF-8";   
                String content=EntityUtils.toString(response.getEntity(), charset);   
                System.out.println(content);
            }
            EntityUtils.consume(resEntity);
        }catch(Exception e){
            e.printStackTrace();
        }finally {
            response.close();
            httpClient.close();
        }
        return result;
    }

    public static void main(String[] args) {
        try {
            simSearchByImg(new File("/path/dog1.jpg"),0,null,null,null,null);
            /*Above Java request upload an image /path/dog1.jpg, search for 
            visually similar images,by using your apikey, values of other parameters 
            are as default*/
            simSearchByImg(new File("/path/dog1.jpg"),45,"pet","345,356",null,"98")
            /*Above Java request upload an image dog1.jpg, search for visually similar 
            images, by using your apikey, search for similar images with keyword “pet”, 
            image category as 45, and result images have labels 345 and 356, 
            but without label 98.  Values of other parameters are as default*/   
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

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