在Android上,由于基于Linux内核,可以使用epoll作为I/O多路复用的技术来优化网络应用
implementation 'org.apache.httpcomponents:httpclient-android:4.3.5.1'
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
public class EpollClient {
public static void main(String[] args) {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpGet request = new HttpGet("http://example.com");
try {
HttpResponse response = httpClient.execute(request);
HttpEntity entity = response.getEntity();
String result = EntityUtils.toString(entity);
System.out.println(result);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.ProtocolVersion;
import org.apache.http.StatusLine;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.bootstrap.HttpServerBootstrap;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.nio.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.nio.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.protocol.BasicStatusLine;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.net.InetSocketAddress;
public class EpollServer {
public static void main(String[] args) throws IOException {
SSLConnectionSocketFactory sslSocketFactory = new SSLConnectionSocketFactory(
new TrustSelfSignedStrategy(),
new String[]{"TLSv1.2"},
null,
SSLConnectionSocketFactory.getDefaultHostnameVerifier());
PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
cm.setMaxTotal(100);
cm.setDefaultMaxPerRoute(20);
HttpServerBootstrap bootstrap = new HttpServerBootstrap();
bootstrap.setConnectionManager(cm);
bootstrap.setSocketFactory(sslSocketFactory);
bootstrap.setHandler(new SimpleServerHandler());
bootstrap.bind(new InetSocketAddress(8443));
}
static class SimpleServerHandler implements org.apache.http.nio.protocol.HttpHandler {
@Override
public void handle(org.apache.http.nio.protocol.HttpExchange httpExchange) throws IOException {
if ("GET".equalsIgnoreCase(httpExchange.getRequestMethod())) {
HttpEntity entity = httpExchange.getRequestBody();
if (entity != null) {
String requestContent = EntityUtils.toString(entity);
System.out.println("Received request: " + requestContent);
}
}
ProtocolVersion protocolVersion = new ProtocolVersion("HTTP", 1, 1);
StatusLine statusLine = new BasicStatusLine(protocolVersion, 200, "OK");
httpExchange.getResponse().setStatusCode(200);
httpExchange.getResponse().setProtocolVersion(protocolVersion);
httpExchange.getResponse().setHeader("Content-Type", "text/plain");
httpExchange.sendResponseHeaders(200, -1);
String responseContent = "Hello, epoll!";
httpExchange.getResponseBody().write(responseContent.getBytes());
httpExchange.getResponseBody().close();
}
}
}
注意:上述示例中的服务器使用了SSL/TLS,因此需要生成自签名证书。在实际生产环境中,请使用有效的SSL证书。
通过以上步骤,你可以在Android上利用epoll优化网络应用。在实际项目中,你可能需要根据具体需求对代码进行调整和优化。