socket实现邮件发送

[java]
通过java的网络编程特性，完成邮件发送的功能，效果图如下：

首先新建一个maiTest的java项目，

然后新建GBC.java和MailTest.java文件

GBC.java代码如下：

[java]
package ch02;   www.zzzyk.com

import java.awt.*;

public class GBC extends GridBagConstraints
{

   public GBC(int gridx, int gridy)
   {
      this.gridx = gridx;
      this.gridy = gridy;
   }

   public GBC(int gridx, int gridy, int gridwidth, int gridheight)
   {
      this.gridx = gridx;
      this.gridy = gridy;
      this.gridwidth = gridwidth;
      this.gridheight = gridheight;
   }

   public GBC setAnchor(int anchor)
   {
      this.anchor = anchor;
      return this;
   }


   public GBC setFill(int fill)
   {
      this.fill = fill;
      return this;
   }

   public GBC setWeight(double weightx, double weighty)
   {
      this.weightx = weightx;
      this.weighty = weighty;
      return this;
   }

   public GBC setInsets(int distance)
   {
      this.insets = new Insets(distance, distance, distance, distance);
      return this;
   }

   public GBC setInsets(int top, int left, int bottom, int right)
   {
      this.insets = new Insets(top, left, bottom, right);
      return this;
   }

   public GBC setIpad(int ipadx, int ipady)
   {
      this.ipadx = ipadx;
      this.ipady = ipady;
      return this;
   }
}

MailTest.java的代码如下：
[java]
package ch02;

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.net.*;
import java.io.*;
import javax.swing.*;

public class MailTest
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(new Runnable()
         {
            public void run()
            {
               JFrame frame = new MailTestFrame();
               frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               frame.setVisible(true);
            }
         });
   }
}

class MailTestFrame extends JFrame
{
   public MailTestFrame()
   {
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
      setTitle("MailTest");

      setLayout(new GridBagLayout());

      add(new JLabel("From:"), new GBC(0, 0).setFill(GBC.HORIZONTAL));

      from = new JTextField(20);
      add(from, new GBC(1, 0).setFill(GBC.HORIZONTAL).setWeight(100, 0));

      add(new JLabel("To:"), new GBC(0, 1).setFill(GBC.HORIZONTAL));

      to = new JTextField(20);
      add(to, new GBC(1, 1).setFill(GBC.HORIZONTAL).setWeight(100, 0));

      add(new JLabel("SMTP server:"), new GBC(0, 2).setFill(GBC.HORIZONTAL));

      smtpServer = new JTextField(20);
      add(smtpServer, new GBC(1, 2).setFill(GBC.HORIZONTAL).setWeight(100, 0));

      message = new JTextArea();
      add(new JScrollPane(message), new GBC(0, 3, 2, 1).setFill(GBC.BOTH).setWeight(100, 100));

      comm = new JTextArea();
      add(new JScrollPane(comm), new GBC(0, 4, 2, 1).setFill(GBC.BOTH).setWeight(100, 100));

      JPanel buttonPanel = new JPanel();
      add(buttonPanel, new GBC(0, 5, 2, 1));

      JButton sendButton = new JButton("Send");
      buttonPanel.add(sendButton);
      sendButton.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
//               new SwingWorker<Void, Void>()
//               {
//                  protected Void doInBackground() throws Exception
//                  {
//                     comm.setText("");
//                     sendMail();
//                   &n

补充：软件开发 , Java ,