这是我写的方法

public FileUploadResponse uploadFile(
        String uploadPath, String fileName, MultipartFile file) throws IOException {
    FileInputStream ins1 = null;
    try {
        File file1 = new File("C:\\Users\\Administrator\\Pictures\\logo111.jpg");
        file.transferTo(file1);
        ins1 = new FileInputStream(file1);
        String sha256 = DigestUtils.sha256Hex(ins1);
        JSONObject requestData = new JSONObject();
        requestData.put("filename",file1.getName());
        requestData.put("sha256",sha256);
        String meta = JSONObject.toJSONString(requestData);
        FileUploadService fileService = new FileUploadService.Builder().config(config).build();
        FileUploadResponse fileUploadResponse = fileService.uploadImage(file1.getPath(), meta,file1.getPath() );
        return fileUploadResponse;
    }catch (Exception e){
        e.printStackTrace();
        return null;
    }finally {
        IOUtils.closeQuietly(ins1);
    }
}

一直返回url字符串无效

java.lang.IllegalArgumentException: The urlString passed in when building httpRequest is invalid:C:\Users\Administrator\Pictures\logo111.jpg

at com.wechat.pay.java.core.http.HttpRequest$Builder.url(HttpRequest.java:120)

at com.wechat.pay.java.service.file.FileUploadService.uploadFile(FileUploadService.java:142)

at com.wechat.pay.java.service.file.FileUploadService.uploadImage(FileUploadService.java:111)

求问大佬这是怎么回事