我要评论本文实例讲述了java实现httpclient异步请求资源的方法。分享给大家供大家参考。具体实现方法如下：
package demo;
import java.util.concurrent.countdownlatch;
import org.apache.http.httpresponse;
import org.apache.http.client.methods.httpget;
import org.apache.http.impl.nio.client.defaulthttpasyncclient;
import org.apache.http.nio.client.httpasyncclient;
import org.apache.http.nio.concurrent.futurecallback;
import org.apache.http.nio.reactor.ioreactorexception;
public class main {
/**
* @param args
* @throws ioreactorexception
* @throws interruptedexception
*/
public static void main(string[] args) throws ioreactorexception, interruptedexception {
final httpasyncclient httpclient = new defaulthttpasyncclient();
httpclient.start();
httpget[] requests = new httpget[] {
new httpget("http://www.apache.org/"),
new httpget("https://www.verisign.com/"),
new httpget("http://www.google.com/")
};
final countdownlatch latch = new countdownlatch(requests.length);
try {
for (final httpget request: requests) {
httpclient.execute(request, new futurecallback<httpresponse>() {
public void completed(final httpresponse response) {
latch.countdown();
system.out.println(request.getrequestline() + "->" + response.getstatusline());
}
public void failed(final exception ex) {
latch.countdown();
ex.printstacktrace();
}
public void cancelled() {
latch.countdown();
}
});
}
system.out.println("doing...");
}finally {
latch.await();
httpclient.shutdown();
}
system.out.println("done");
}
}
希望本文所述对大家的java程序设计有所帮助。
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