Java APIs

Hi. I've searched the web after this but hasn't found anything that worked for me.

Here you can see my code. My intention is to post data to the second <form> in the URL but unfortunatelly I still get the original URL content. My intention is to get the result of posting the data to the url.

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

public class POSTRequester {

	public static void bombearURL ( String urlString, Par... parametros) {
		
		try {
    	    // Construct data
    	    String data = "";
    	    for ( Par par : parametros ) {
    	    	if ( data.length() > 1 ) data += "&";
    	    	data += URLEncoder.encode(par.param, "UTF-8") + "=" + URLEncoder.encode(par.value, "UTF-8");
    	    }

    	    // Connect
    	    URL url = new URL(urlString);
    	    URLConnection conn = url.openConnection();
    	    
    	    // Send data
    	    conn.setDoOutput(true);
    	    conn.setDoInput(true); //
    	    
    	    // No caching, we want the real thing.
    	    conn.setUseCaches (false);
    	    // Specify the content type.
    	    conn.setRequestProperty ("Content-Type", "application/x-www-form-urlencoded");   	    
    	    
    	    
    	    OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
    	    wr.write(data);
    	    wr.flush();

    	    // Get the response
    	    BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    	    String line;
    	    while ((line = rd.readLine()) != null) {
    	        // Process line...
    	    	System.out.println(line);
    	    }
    	    wr.close();
    	    rd.close();
    	} catch (Exception e) {
    	}
		
		
	}
	
    public static void main(String[] args)  {
    	
    	bombearURL ("http://www.buscacep.correios.com.br/servicos/dnec/menuAction.do?Metodo=menuFaixaCep", 
    			new Par("UF", "SC"), 
    			new Par("Localidade", "Florianopolis") 
    	);
    	
    	
    }
    
}

class Par {
	
	String param;
	String value;
	
	public Par(String param, String value) {
		super();
		this.param = param;
		this.value = value;
	}
	
}