上次推荐的免费图床只有1个g，而且只用postman做了测试，今天推荐1个100g的免费图床+java后台代码上传测试

他的地址为：https://images.ac.cn/

1.看api需要什么参数

看api知道，需要这么几个参数，首先在类里面定义它

public class UploadConstant {
    public static final String API_TYPE = "ali";
    public static final String PRIVATE_STRORAGE = "oss";
    public static final String TOKEN = "填写自己的token";
    public static final String URL = "https://images.ac.cn/api/upload/upload";
}

2.上传代码

public class UploadUtil {
    public static JSONObject uploadImg(File image, String apiType, String privateStorage, String token, String url) {
        RequestBody fileBody = RequestBody.create(MediaType.parse("image/*"), image);
        OkHttpClient client = new OkHttpClient();
        JSONObject jsonObject = null;
        RequestBody requestBody = new MultipartBody.Builder()
                .setType(MultipartBody.FORM)
                .addFormDataPart("image", image.getName(), fileBody)
                .addFormDataPart("apiType", apiType)
                .addFormDataPart("privateStorage", privateStorage)
                .addFormDataPart("token", token)
                .build();

        System.out.println(requestBody.toString());
        Request request = new Request.Builder()
                .url(url)
                .post(requestBody)
                .build();

        Response response;
        try {
            response = client.newCall(request).execute();
            String jsonString = response.body().string();
            jsonObject = JSON.parseObject(jsonString);
            System.out.println("返回："+jsonObject.getJSONObject("data").getJSONObject("url").getString("ali"));

            if(!jsonObject.getString("code").equals("200")){
                System.out.println("图片上传土豆图床错误。。。。");
            }else{

            }

        } catch (IOException e) {

        }catch (JSONException e){

        }
        return jsonObject;
    }

    //获取流文件
    public static void inputStreamToFile(InputStream ins, File file) {
        try {
            OutputStream os = new FileOutputStream(file);
            int bytesRead = 0;
            byte[] buffer = new byte[8192];
            while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {
                os.write(buffer, 0, bytesRead);
            }
            os.close();
            ins.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

3,.上传返回图片url:

@RequestMapping(value = "/uploadImg", method = RequestMethod.POST)
public @ResponseBody String uploadImg(@RequestParam("photo") MultipartFile file, HttpServletRequest request)
        throws IllegalStateException, IOException {
    File toFile = null;
    if (file.equals("") || file.getSize() <= 0) {
        file = null;
    } else {
        InputStream ins = null;
        ins = file.getInputStream();
        toFile = new File(file.getOriginalFilename());
        UploadUtil.inputStreamToFile(ins, toFile);
        ins.close();
    }
     String url = UploadUtil.uploadImg(toFile, UploadConstant.API_TYPE,UploadConstant.PRIVATE_STRORAGE,UploadConstant.TOKEN,UploadConstant.URL).getJSONObject("data").getJSONObject("url").getString("ali");
    System.out.println("图片url:"+url);
    return url;
}

返回的url：

查看自己的图床是否上传了：

注意：后台上传图片，主要用到了okhttp3这个jar,他的pom配置为：

<!-- https://mvnrepository.com/artifact/com.squareup.okhttp3/okhttp -->
<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>4.4.0</version>
</dependency>