RestTemplate调用接口（附有账号密码）

private JSONObject Post(String url, String payload, String username, String password) {
        RestTemplate template = new RestTemplate();
        CredentialsProvider provider = new BasicCredentialsProvider();
        UsernamePasswordCredentials credentials = new UsernamePasswordCredentials(username, password);
        provider.setCredentials(AuthScope.ANY, credentials);
        CloseableHttpClient client = HttpClientBuilder.create().setDefaultCredentialsProvider(provider)
                .useSystemProperties().build();
        HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactoryDigestAuth(client);
        template.setRequestFactory(requestFactory);
        JSONObject jsonObject = JSONObject.fromObject(payload);
        System.out.println(JSON.toJSONString(jsonObject));
        JSONObject resultObj = template.postForObject(url, jsonObject, JSONObject.class);return resultObj;
    }