1、精選優(yōu)質(zhì)文檔-傾情為你奉上這個程序主要就是實現(xiàn)一個簡單的郵件客戶端，在知道郵箱服務器pop3地址的情況下可以實現(xiàn)隨意填寫發(fā)信人地址給指定用戶發(fā)郵件。代碼如下：import java.awt.*;import java.awt.event.*;import java.io.*;import .*;import javax.swing.*;import javax.swing.border.BevelBorder;public class Mailclient extends JFrame public Mailclient() JPanel p = new JPanel();/create th

2、e GUIJPanel p1 = new JPanel();JPanel p2 = new JPanel();JPanel p3 = new JPanel();JPanel p4 = new JPanel();JPanel p5 = new JPanel();JButton Send = new JButton("Send");/three buttonJButton Clear = new JButton("Clear");JButton Quit = new JButton("Quit");String defult = &quo

3、t;You can change the information or use the defult, and you can get the run information from Java Console."/create the default mail textfinal JTextArea messages = new JTextArea(defult, 22, 40);messages.setLineWrap(true);/auto line feedmessages.setBorder(new BevelBorder(BevelBorder.LOWERED, Colo

4、r.gray, Color.gray);p1.add(new JLabel("From: ");final JTextField jtf1 = new JTextField("android_757", 38);p1.add(jtf1);p2.add(new JLabel("To: ");final JTextField jtf2 = new JTextField("android_757", 40);p2.add(jtf2);p3.add(new JLabel("Subject: ");fin

5、al JTextField jtf3 = new JTextField("Test Mailclient", 37);p3.add(jtf3);p5.add(new JLabel("Mail Server Name: ");final JTextField jtf4 = new JTextField("", 32);p5.add(jtf4);p4.add(Send);Send.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e

6、)Socket clientSocket;OutputStream outToServer;/send messengers to mail serverBufferedReader inFromServer;/receive messengers from mail serverString mailFrom = jtf1.getText();/get the information that user inputString mailTo = jtf2.getText();String mailSubject = jtf3.getText();String mailSeverName =

7、jtf4.getText();String getFromServer = null;try clientSocket = new Socket(mailSeverName, 25);/create connect with mailServer on port 25inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream();outToServer = clientSocket.getOutputStream();PrintWriter sockout = new PrintWrit

8、er (outToServer, true); getFromServer = inFromServer.readLine();System.out.println(getFromServer);if(getFromServer.startsWith("220")/send messengers as STMP rules(book page 78)sockout.println ("HELO Sariel"); /and output all information on consoleSystem.out.println("HELO Sar

9、iel");getFromServer = inFromServer.readLine();System.out.println(getFromServer);if(getFromServer.startsWith("250")sockout.println ("MAIL FROM: " +"<" + mailFrom + ">");System.out.println("MAIL FROM: " +"<" + mailFrom + "&

10、gt;");getFromServer = inFromServer.readLine();System.out.println(getFromServer);if(getFromServer.startsWith("250")sockout.println ("RCPT TO: " +"<" + mailTo + ">");System.out.println("RCPT TO: " +"<" + mailTo + ">"

11、;);getFromServer = inFromServer.readLine();System.out.println(getFromServer);if(getFromServer.startsWith("250")sockout.println ("DATA");System.out.println("DATA");getFromServer = inFromServer.readLine();System.out.println(getFromServer);if(getFromServer.startsWith("

12、;354")sockout.println ("From: " + mailFrom);sockout.println ("To: " + mailTo);sockout.println ("Subject: " + mailSubject);sockout.println ();System.out.println("From: " + mailFrom);System.out.println("To: " + mailTo);System.out.println("Sub

13、ject: " + mailSubject);System.out.println();String str=messages.getText();StringReader sr=new StringReader(str);BufferedReader br=new BufferedReader(sr);String line = ""while(true)try /write the main text to serverline=br.readLine();if(line = null)break;sockout.println (line);System.o

14、ut.println(line); catch (IOException e1) e1.printStackTrace();sockout.println (".");/end main text with "."System.out.println(".");getFromServer = inFromServer.readLine();System.out.println(getFromServer);if(getFromServer.startsWith("250")sockout.println (&quo

15、t;QUIT");System.out.println("QUIT");getFromServer = inFromServer.readLine();System.out.println(getFromServer);if(getFromServer.startsWith("221")System.out.println('n' + "Successfully send!"); catch (UnknownHostException e2) e2.printStackTrace(); catch (IOEx

16、ception e2) e2.printStackTrace(););p4.add(Clear);/the button "Clear" delete all information in JTextAreaClear.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e)messages.setText(""););p4.add(Quit);Quit.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e)System.exit(0););p.add(p1);p.add(p2);p.add(p3);p.add(p5);p.add(messages);p.add(p4);p.setBorder(new BevelBorder(BevelBorder.RAISED);add(p);public static void mai