import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.params.ConnRoutePNames;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
/**
* How to send a request via proxy using {@link HttpClient}.
*
* @since 4.0
*/
public class ProxyTest {
public static void main(String[] args)throws Exception {
HttpHost proxy = new HttpHost("194.170.16.75", 80, "http");
DefaultHttpClient httpclient = new DefaultHttpClient();
try {
httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
HttpHost target = new HttpHost("www.ip138.com/ip2city.asp", 80, "http"); HttpGet req = new HttpGet("/");
System.out.println("executing request to " + target + " via " + proxy);
HttpResponse rsp = httpclient.execute(target, req);
HttpEntity entity = rsp.getEntity();
System.out.println("----------------------------------------");
System.out.println(rsp.getStatusLine());
Header[] headers = rsp.getAllHeaders();
for (int i = 0; i<headers.length; i++) {
System.out.println(headers[i]);
}
System.out.println("----------------------------------------");
if (entity != null) {
System.out.println(EntityUtils.toString(entity));
}
} finally {
// When HttpClient instance is no longer needed,
// shut down the connection manager to ensure
// immediate deallocation of all system resources
Thread.sleep(30000);
httpclient.getConnectionManager().shutdown();
}
}
}
主要使用的是HttpHost这个类，但遇到了这样一个问题，如果直接使用域名的话（如，www.ip138.net）测试一切正常，如果换成具体到哪个页面(如，www.ip138.net/ip2city.asp)就会报错
查阅了这类的具体方法如下：
// Constructors
public HttpHost(String hostname, int port, String scheme) { }
public HttpHost(String hostname, int port) { }
public HttpHost(String hostname) { }
public HttpHost(HttpHost httphost) { }
于是改成了第三种形参只带域名测试正常，再加上具体的页面又访问不到了
怀疑应该是不管你是否参数带上端口，默认都帮你加上了端口如，www.ip138.net:80，这个是可以访问到网页的，但如果是www.ip138.net/ip2city.asp:80,这就会报错了。
这个问题需要如何解决？
------解决方案--------------------
具体页面应该在HttpGet里面进行获得