使用 HttpComponents HttpClient 进行基本身份验证

使用 HttpClient 作为 RestTemplate 的底层实现来创建 HTTP 请求允许在与 API 交互时自动处理基本身份验证请求（http 401 响应）。此示例显示如何配置 RestTemplate 来实现此目的。

// The credentials are stored here
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(
        // AuthScope can be configured more extensively to restrict
        // for which host/port/scheme/etc the credentials will be used.
        new AuthScope("somehost", AuthScope.ANY_PORT), 
        new UsernamePasswordCredentials("username", "password"));

// Use the credentials provider
HttpClientBuilder builder = HttpClientBuilder.create();
builder.setDefaultCredentialsProvider(credsProvider);

// Configure the RestTemplate to use HttpComponent's HttpClient
ClientHttpRequestFactory requestFactory =
        new HttpComponentsClientHttpRequestFactory(builder.build());
RestTemplate restTemplate = new RestTemplate(requestFactory);