?? post.java
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//file: Post.javaimport java.net.*;import java.io.*;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Post extends JPanel implements ActionListener { JTextField nameField, passwordField; String postURL; GridBagConstraints constraints = new GridBagConstraints( ); void addGB( Component component, int x, int y ) { constraints.gridx = x; constraints.gridy = y; add ( component, constraints ); } public Post( String postURL ) { this.postURL = postURL; JButton postButton = new JButton("Post"); postButton.addActionListener( this ); setLayout( new GridBagLayout( ) ); addGB( new JLabel("Name:"), 0,0 ); addGB( nameField = new JTextField(20), 1,0 ); addGB( new JLabel("Password:"), 0,1 ); addGB( passwordField = new JPasswordField(20),1,1 ); constraints.gridwidth = 2; addGB( postButton, 0,2 ); } public void actionPerformed(ActionEvent e) { postData( ); } protected void postData( ) { StringBuffer sb = new StringBuffer( ); sb.append( URLEncoder.encode("Name") + "=" ); sb.append( URLEncoder.encode(nameField.getText( )) ); sb.append( "&" + URLEncoder.encode("Password") + "=" ); sb.append( URLEncoder.encode(passwordField.getText( )) ); String formData = sb.toString( ); try { URL url = new URL( postURL ); HttpURLConnection urlcon = (HttpURLConnection) url.openConnection( ); urlcon.setRequestMethod("POST"); urlcon.setRequestProperty("Content-type", "application/x-www-form-urlencoded"); urlcon.setDoOutput(true); urlcon.setDoInput(true); PrintWriter pout = new PrintWriter( new OutputStreamWriter( urlcon.getOutputStream( ), "8859_1"), true ); pout.print( formData ); pout.flush( ); // read results... if ( urlcon.getResponseCode( ) != HttpURLConnection.HTTP_OK ) System.out.println("Posted ok!"); else { System.out.println("Bad post..."); return; } //InputStream in = urlcon.getInputStream( ); // ... } catch (MalformedURLException e) { System.out.println(e); // bad postURL } catch (IOException e2) { System.out.println(e2); // I/O error } } public static void main( String [] args ) { JFrame frame = new JFrame("SimplePost"); frame.getContentPane( ).add( new Post( args[0] ), "Center" ); frame.pack( ); frame.setVisible(true); }}
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