Java URIBuilder 位于加载器"app"的未命名模块中

Question

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();

当我尝试捕获我的HTTPResponseclient.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')

Answer 1

您正面临错误，因为您试图将URIBuilder的实例转换为HttpUriRequest。

为了执行HTTP请求，您需要创建一个适当的HttpUriRequest实现。

在你的用例中，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();

对于您的评论，您似乎正在尝试使用SSL连接到一个站点:问题是您的Java代码不信任服务器。

你需要配置一个有效的证书链，并指示你的代码使用它来解决问题。

Apache Client不依赖于标准的JSSE机制来实现这个目的。相反，您需要用适当的TrustManager配置SSLContext。请参阅以下代码(第一部分来自Android开发人员站点中这个非凡的文档片段):

// 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openssl等工具获取服务器证书。请看看这个很棒的SO问题。