Hvordan laver man POST fra Java

Hvis der ikke er login o.lign. så kan du nøjes med (Http)URLConnection klassen som kommer med Java.

Eksempel:

        URL url = new URL("http://www.domain.dk/htbin/tell2");
        HttpURLConnection con = (HttpURLConnection)url.openConnection();
        con.setRequestMethod("POST");
        String info = "nam=val";
        con.setDoOutput(true);
        con.getOutputStream().write(info.getBytes());
        con.connect();
        if(con.getResponseCode() == HttpURLConnection.HTTP_OK) {
            InputStream is = con.getInputStream();
            byte[] b = new byte[1000];
            int n;
            while((n = is.read(b)) >= 0) {
              System.out.println(new String(b,0,n));
            }
            is.close();
        }
        con.disconnect();

Hvis der er login o.lign. så vil jeg anbefale Jakarta HttpClient.

Eksempel:

import java.io.IOException;

import org.apache.commons.httpclient.Cookie;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;

public class Login {
    private HttpClient client;
   
    public Login() {
        client = new HttpClient();
    } 
   
    public void login(String url,
                      String userField, String userValue,
                      String passField, String passValue) {
        NameValuePair[] nvp = new NameValuePair[2];
        nvp[0] = new NameValuePair(userField, userValue);
        nvp[1] = new NameValuePair(passField, passValue);
        post(url, nvp);
    }
    public String get(String url) {
        GetMethod met = new GetMethod(url);
        try {
            client.executeMethod(met);
        } catch (HttpException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return met.getResponseBodyAsString();
    }
    public String post(String url, NameValuePair[] nvp) {
        PostMethod met = new PostMethod(url);
        if(nvp != null) {
            met.setRequestBody(nvp);
        }
      try {
        client.executeMethod(met);
      } catch (HttpException e) {
            e.printStackTrace();
      } catch (IOException e) {
            e.printStackTrace();
      }
        return met.getResponseBodyAsString();
    }
  public static void main(String[] args) {
        Login lgi = new Login();
        lgi.login("http://arne:8080/useradmin/Login",
                  "username", args[0],
                  "password", args[1]);
        System.out.println(lgi.get("http://arne:8080/useradmin/UserAdmin.jsp"));
  }
}

Note: ovenstående er til version 2.x/3.x af HttpClient - de har ændret API'et lidt i 4.x !

OK ?

arne_v  -det var lige det jeg skulle bruge... mange tak for svaret