Java URIBuilder 位于加载程序“app”的未命名模块中

如何解决Java URIBuilder 位于加载程序“app”的未命名模块中

我想执行 GET 请求：

    HttpGet request = new HttpGet(URL_SECURED_BY_BASIC_AUTHENTICATION);
    URIBuilder uriBuilder = new URIBuilder(request.getURI())
            .addParameter("code","001")
            .addParameter("name","AAA")
           

    String auth = user + ":" + mdp;

    byte[] encodedAuth = Base64.encodeBase64(
            auth.getBytes(StandardCharsets.ISO_8859_1));

    String authHeader = "Basic " + new String(encodedAuth);

    request.setHeader(HttpHeaders.AUTHORIZATION,authHeader);

    HttpClient client = HttpClientBuilder.create().build();
    HttpResponse response = client.execute((HttpUriRequest) uriBuilder);

    int statusCode = response.getStatusLine().getStatusCode();

当我尝试捕捉我的 HTTPResponse client.execute((HttpUriRequest) uriBuilder); 我有这个错误：

java.lang.classCastException: class org.apache.http.client.utils.URIBuilder cannot be cast to class org.apache.http.client.methods.HttpUriRequest (org.apache.http.client.utils.URIBuilder and org.apache.http.client.methods.HttpUriRequest are in unnamed module of loader 'app')

解决方法

您遇到错误是因为您试图将 URIBuilder 的实例转换为 HttpUriRequest。

您需要创建适当的 HttpUriRequest 实现才能执行您的 HTTP 请求。

在您的用例中，我想它应该是这样的：

    URIBuilder uriBuilder = new URIBuilder(URL_SECURED_BY_BASIC_AUTHENTICATION)
            .addParameter("code","001")
            .addParameter("name","AAA");

    URI uri = uriBuilder.build();  
           
    HttpGet request = new HttpGet(uri);

    String auth = user + ":" + mdp;

    byte[] encodedAuth = Base64.encodeBase64(
            auth.getBytes(StandardCharsets.ISO_8859_1));

    String authHeader = "Basic " + new String(encodedAuth);

    request.setHeader(HttpHeaders.AUTHORIZATION,authHeader);

    HttpClient client = HttpClientBuilder.create().build();
    HttpResponse response = client.execute(request);

    int statusCode = response.getStatusLine().getStatusCode();

您的评论似乎是您尝试使用 SSL 连接到站点：问题在于您的 Java 代码不信任服务器。

您需要配置有效的证书链并指示您的代码使用它才能解决问题。

Apache 客户端不依赖标准的 JSSE 机制来实现这一目的。相反，您需要使用适当的 SSLContext 配置 TrustManager。请查看以下代码（第一部分源自 Android 开发者网站中的 this extraordinary documentation fragment）：

// Load your server certificate
CertificateFactory cf = CertificateFactory.getInstance("X.509");

InputStream input = new BufferedInputStream(
  new FileInputStream("server.crt")
);

Certificate certificate;
try {
  certificate = cf.generateCertificate(input);
} finally {
  input.close();
}

// Create an in-memory KeyStore containing the server certificate
// It is required in order to configure the TrustManager
String keyStoreType = KeyStore.getDefaultType(); // JKS
KeyStore keyStore = KeyStore.getInstance(keyStoreType);
keyStore.load(null,null);
keyStore.setCertificateEntry("cert",certificate);

// Create a TrustManager that trusts the server certificates in the KeyStore
TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(
  TrustManagerFactory.getDefaultAlgorithm()
);
trustManagerFactory.init(keyStore);

// Create an SSLContext that uses our TrustManager
SSLContext context = SSLContext.getInstance("TLS");
context.init(null,trustManagerFactory.getTrustManagers(),null);

// Now,the actual Apache Client part

//Create a SSLConnectionSocketFactory and pass it the above created SSLContext
SSLConnectionSocketFactory factory = 
  new SSLConnectionSocketFactory(sslcontext,new NoopHostnameVerifier()
);

//Create the actual HttpClient
CloseableHttpClient client = HttpClients
  .custom()
  .setSSLSocketFactory(factory)
  .build()
;

// Use this client to perform your HTTP invocation

HttpResponse response = client.execute(request);

int statusCode = response.getStatusLine().getStatusCode();

您可以从浏览器或使用 openssl 等工具获取服务器证书。请看这个伟大的SO question。