URL url = new URL("http://example.com/api");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
int responseCode = connection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
StringBuilder response = new StringBuilder();
while ((line = reader.readLine()) != null) {
response.append(line);
}
reader.close();
System.out.println(response.toString());
} else {
}
connection.disconnect();
2. Apache HttpClient:
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet("http://example.com/api");
CloseableHttpResponse response = httpclient.execute(httpGet);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
HttpEntity entity = response.getEntity();
String responseString = EntityUtils.toString(entity);
System.out.println(responseString);
} else {
}
response.close();
httpclient.close();
PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager();
connManager.setMaxTotal(100);
connManager.setDefaultMaxPerRoute(10);
SSLContext sslContext = SSLContexts.custom()
.loadTrustMaterial(new TrustSelfSignedStrategy())
.build();
CloseableHttpClient httpclient = HttpClients.custom()
.setConnectionManager(connManager)
.setSSLContext(sslContext)
.build();
3. OkHttp:
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("http://example.com/api")
.build();
Response response = client.newCall(request).execute();
if (response.isSuccessful()) {
String responseString = response.body().string();
System.out.println(responseString);
} else {
}
response.close();
Interceptor interceptor = new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request originalRequest = chain.request();
// ...
Response response = chain.proceed(originalRequest);
// ...
return response;
}
};
OkHttpClient client = new OkHttpClient.Builder()
.addInterceptor(interceptor)
.build();
