sendmail.java

基于SMTP的邮件发送

import java.awt.*;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;

import javax.swing.*;

class SendMail extends javax.swing.JFrame {
	boolean frameSizeAdjusted = false;

	javax.swing.JLabel JLabel1 = new javax.swing.JLabel();

	javax.swing.JLabel JLabel2 = new javax.swing.JLabel();

	javax.swing.JLabel JLabel3 = new javax.swing.JLabel();

	javax.swing.JLabel JLabel4 = new javax.swing.JLabel();

	javax.swing.JLabel JLabel5 = new javax.swing.JLabel();

	javax.swing.JTextField _from = new javax.swing.JTextField();

	javax.swing.JTextField _to = new javax.swing.JTextField();

	javax.swing.JTextField _subject = new javax.swing.JTextField();

	javax.swing.JTextField _smtp = new javax.swing.JTextField();

	javax.swing.JScrollPane _scrollPane2 = new javax.swing.JScrollPane();

	javax.swing.JTextArea _body = new javax.swing.JTextArea();

	javax.swing.JButton Send = new javax.swing.JButton();

	javax.swing.JButton Cancel = new javax.swing.JButton();

	javax.swing.JScrollPane _scrollPane = new javax.swing.JScrollPane();

	javax.swing.JList _output = new javax.swing.JList();

	javax.swing.DefaultListModel _model = new javax.swing.DefaultListModel();

	java.io.BufferedReader _in;

	BufferedWriter _out;

	public SendMail() {
		setTitle("计科0401班　吴立雪 04281019  韦锦想 04281017【SMTP客户端】");
		getContentPane().setLayout(null);
		setSize(736, 348);
		setVisible(false);
		JLabel1.setText("发件人:");
		getContentPane().add(JLabel1);
		JLabel1.setBounds(12, 17, 48, 12);
		JLabel2.setText("收件人:");
		getContentPane().add(JLabel2);
		JLabel2.setBounds(12, 53, 48, 12);
		JLabel3.setText("主题:");
		getContentPane().add(JLabel3);
		JLabel3.setBounds(12, 89, 48, 12);
		JLabel4.setText("SMTP服务器:");
		getContentPane().add(JLabel4);
		JLabel4.setBounds(12, 125, 90, 12);
		JLabel5.setText("邮件内容:");
		getContentPane().add(JLabel5);
		JLabel5.setBounds(12, 161, 90, 12);
		getContentPane().add(_from);
		_from.setBounds(96, 12, 300, 24);
		getContentPane().add(_to);
		_to.setBounds(96, 48, 300, 24);
		getContentPane().add(_subject);
		_subject.setBounds(96, 84, 300, 24);
		getContentPane().add(_smtp);
		_smtp.setBounds(96, 120, 300, 24);
		getContentPane().add(_scrollPane2);
		_scrollPane2.setBounds(12, 178, 384, 118);
		_body.setText("");
		_scrollPane2.getViewport().add(_body);
		_body.setBounds(0, 0, 381, 105);
		Send.setText("发送");
		Send.setActionCommand("Send");
		getContentPane().add(Send);
		Send.setBounds(60, 312, 132, 24);
		Cancel.setText("取消");
		Cancel.setActionCommand("Cancel");
		getContentPane().add(Cancel);
		Cancel.setBounds(216, 312, 120, 24);
		getContentPane().add(_scrollPane);
		_scrollPane.setBounds(408, 12, 312, 308);
		getContentPane().add(_output);
		_output.setBounds(408, 12, 309, 285);
		SymAction lSymAction = new SymAction();
		Send.addActionListener(lSymAction);
		Cancel.addActionListener(lSymAction);
		_output.setModel(_model);
		_model.addElement("服务器响应:");
		_scrollPane.getViewport().setView(_output);
		_scrollPane2.getViewport().setView(_body);
	}

	public void setVisible(boolean b) {
		if (b)
			setLocation(50, 50);
		super.setVisible(b);
	}

	static public void main(String args[]) {
		SendMail sendmail = new SendMail();
		sendmail.show();

		sendmail.setDefaultCloseOperation(SendMail.EXIT_ON_CLOSE);
	}

	public void addNotify() {
		Dimension size = getSize();
		super.addNotify();
		if (frameSizeAdjusted)
			return;
		frameSizeAdjusted = true;
		Insets insets = getInsets();
		javax.swing.JMenuBar menuBar = getRootPane().getJMenuBar();
		int menuBarHeight = 0;
		if (menuBar != null)
			menuBarHeight = menuBar.getPreferredSize().height;
		setSize(insets.left + insets.right + size.width, insets.top
				+ insets.bottom + size.height + menuBarHeight);
	}

	class SymAction implements java.awt.event.ActionListener {
		public void actionPerformed(java.awt.event.ActionEvent event) {
			Object object = event.getSource();
			if (object == Send)
				Send_actionPerformed(event);
			else if (object == Cancel)
				Cancel_actionPerformed(event);
		}
	}

	protected void send(String s) throws java.io.IOException {
		if (s != null) {
			_model.addElement("C:" + s);
			_out.write(s);
			_out.newLine();
			_out.flush();
		}
		String line = _in.readLine();
		if (line != null) {
			_model.addElement("S:" + line);
		}
	}

	void Send_actionPerformed(java.awt.event.ActionEvent event) {
		try {
			java.net.Socket socket = new java.net.Socket(_smtp.getText(), 25);
			_in = new BufferedReader(new InputStreamReader(socket
					.getInputStream()));
			_out = new BufferedWriter(new OutputStreamWriter(socket
					.getOutputStream()));
			send("hello " + _smtp.getText());
			send("mail from:" + _from.getText() + "");
			send("rcpt to:" + _to.getText() + "");
			send("data");
			_out.write("From: " + _from.getText());
			_out.newLine();
			_out.write("To: " + _to.getText());
			_out.newLine();
			_out.write("Subject: " + _subject.getText());
			_out.newLine();
			_out.newLine();
			_out.write(_body.getText());
			_out.newLine();
			send(".");
			send("quit");

		} catch (Exception e) {
			_model.addElement("Error: " + e);
		}
	}

	void Cancel_actionPerformed(java.awt.event.ActionEvent event) {
		System.exit(0);
	}
}