import java.net.URL;
import java.net.URLConnection;
import java.net.ConnectException;
import java.io.IOException;
import java.util.Date;
import java.net.HttpURLConnection;
public class GetURLInfo{
public static void printInfo(URL url){
System.out.println("==================URL info=================="
);
//URL基本信息
System.out.println("File ["+url.getFile()+"]"
);
System.out.println("Protocol ["+url.getProtocol()+"]"
);
System.out.println("Authority ["+url.getAuthority()+"]"
);
System.out.println("DefaultPort ["+url.getDefaultPort()+"]"
);
System.out.println("Host ["+url.getHost()+"]"
);
System.out.println("Path ["+url.getPath()+"]"
);
System.out.println("Port ["+url.getPort()+"]"
);
System.out.println("Query ["+url.getQuery()+"]"
);
System.out.println("Ref ["+url.getRef()+"]"
);
System.out.println("UserInfo ["+url.getUserInfo()+"]"
);
URLConnection c =
null;
try{
c =
url.openConnection();
System.out.println("==================URLConnection info=================="
);
//显示信息
System.out.println("ContentType [" + c.getContentType() + "]"
);
System.out.println("ContentEncoding [" + c.getContentEncoding() + "]"
);
System.out.println("Content [" + c.getContent() + "]"
);
System.out.println("ContentLength [" + c.getContentLength() + "]"
);
System.out.println("Date [" +
new Date(c.getDate()) + "]"
);
System.out.println("LastModified [" +
new Date(c.getExpiration()) + "]"
);
System.out.println("Expiration [" +
new Date(c.getLastModified()) + "]"
);
if(c
instanceof HttpURLConnection){
System.out.println("==================HttpURLConnection info=================="
);
HttpURLConnection httpURL =
(HttpURLConnection)c;
System.out.println("RequestMethod [" + httpURL.getRequestMethod() + "]"
);
System.out.println("ResponseMessage [" + httpURL.getResponseMessage() + "]"
);
System.out.println("ResponseCode [" + httpURL.getResponseCode() + "]"
);
}
}catch(IOException e){
e.printStackTrace();
}
}
public static void main(String[] args){
try{
String urlStr = "http://www.sina.com.cn:80/index.html"
;
URL url =
new URL(urlStr);
printInfo(url);
}catch(Exception e){
System.err.println(e);
}
}
}
运行结果：
G:\maul keyboard\network programming>javac GetURLInfo.javaG:\maul keyboard\network programming>java GetURLInfo==================URL info==================File [/index.html]Protocol [http]Authority [www.sina.com.cn:80]DefaultPort [80]Host [www.sina.com.cn]Path [/index.html]Port [80]Query [null]Ref [null]UserInfo [null]==================URLConnection info==================ContentType [text/html]ContentEncoding [null]Content [sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@6178b9ce]ContentLength [21826]Date [Sat Sep 08 18:29:00 GMT+08:00 2018]LastModified [Sat Sep 08 18:28:54 GMT+08:00 2018]Expiration [Wed Apr 27 10:00:04 GMT+08:00 2005]==================HttpURLConnection info==================RequestMethod [GET]ResponseMessage [OK]ResponseCode [200]G:\maul keyboard\network programming>
转载于:https://www.cnblogs.com/celine/p/9610005.html
