Java Implementation Web Landing

Web Web Landing is nothing more than Web Capture, cookie management, post and get-mode simulations.





1. Web content Acquisition


Java.io.InputStream in;


Java.net.URL URL = new Java.net.URL (www.xyz.com/content.html);


java.net.HttpURLConnection connection = (java.net.HttpURLConnection)


url.openconnection ();


connection = (java.net.HttpURLConnection) url.openconnection ();


//analog into IE


connection.setrequestproperty ("User-agent", "mozilla/4.0" (compatible; MSIE 6.0; Windows 2000) ");


Connection.connect ();


in = Connection.getinputstream ();


Java.io.BufferedReader Breader =


New BufferedReader (New InputStreamReader (in, "GBK"));


String Str=breader.readline ());


while (St!= null) {


System.out.println (str);


str=breader.readline ());


}


2.cookie Management





1. Direct Way


Get Cookie:


httpurlconnection huc= (httpurlconnection) url.openconnection ();


InputStream is = Huc.getinputstream ();


//Get SessionID.


String cookieval = Hc.getheaderfield ("Set-cookie");


String sessionId;


if (cookieval!= null)


{


sessionId = cookieval.substring (0, Cookieval.indexof (";"));


}





Send settings Cookie:


httpurlconnection huc= (httpurlconnection) url.openconnection ();


if (sessionId!= null)


{


huc.setrequestproperty ("Cookie", sessionId);


}


InputStream is = Huc.getinputstream ();











2. Jcookie Package (http://jcookie.sourceforge.net/)


Get Cookies:


url url = new URL ("http://www.site.com/");


httpurlconnection Huc = (httpurlconnection) url.openconnection ();


Huc.connect ();


InputStream is = Huc.getinputstream ();


Client client = new Client ();


Cookiejar CJ = client.getcookies (HUC);








the new request, using the cookie obtained above:





url = new URL ("http://www.site.com/");


Huc = (httpurlconnection) url.openconnection ();


client.setcookies (HUC, CJ);







Simulation
of
3.post mode

url url = new URL ("www.xyz.com");


httpurlconnection Huc = (httpurlconnection) url.openconnection ();


//settings allow output


Huc.setdooutput (TRUE);


//Set to post mode


Huc.setrequestmethod ("POST");


huc.setrequestproperty ("User-agent", "mozilla/4.7 [en]" (Win98; I) ");


stringbuffer sb = new StringBuffer ();


sb.append ("username=" +usernme);


sb.append ("&password=" +password);





Post Information


outputstream OS = Huc.getoutputstream ();


Os.write (Sb.tostring (). GetBytes ("GBK"));


Os.close ();





bufferedreader br = new BufferedReader (New InputStreamReader (Huc.getinputstream ())








Huc.connect ();





String line = Br.readline ();





while (line!= null) {





L





System.out.printli (line);








line = Br.readline ();





}