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;
    }

import org.apache.http.HttpHost;
import org.apache.http.client.AuthCache;
import org.apache.http.client.HttpClient;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.impl.auth.DigestScheme;
import org.apache.http.impl.client.BasicAuthCache;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;

import java.net.URI;

public class HttpComponentsClientHttpRequestFactoryDigestAuth extends HttpComponentsClientHttpRequestFactory {
    public HttpComponentsClientHttpRequestFactoryDigestAuth(HttpClient client) {
        super(client);
    }

    @Override
    protected HttpContext createHttpContext(HttpMethod httpMethod, URI uri) {
        return createHttpContext(uri);
    }

    private HttpContext createHttpContext(URI uri) {
        // Create AuthCache instance
        AuthCache authCache = new BasicAuthCache();
        // Generate DIGEST scheme object, initialize it and add it to the local auth cache
        DigestScheme digestAuth = new DigestScheme();
        // If we already know the realm name
        //        digestAuth.overrideParamter("realm", "myrealm");
        HttpHost targetHost = new HttpHost(uri.getHost(), uri.getPort());
        authCache.put(targetHost, digestAuth);

        // Add AuthCache to the execution context
        BasicHttpContext localcontext = new BasicHttpContext();
        localcontext.setAttribute(ClientContext.AUTH_CACHE, authCache);
        return localcontext;
    }
}