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) {
JFrame frame = new MailTestFrame();
frame.show();
}
}
class MailTestFrame extends JFrame implements ActionListener {
private BufferedReader in;
private PrintWriter out;
private JTextField from;
private JTextField to;
private JTextField smtpServer;
private JTextArea message;
private JTextArea response;
public MailTestFrame() {
setTitle("MailTest");
setSize(300, 300);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
getContentPane().setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
// 当容器比组件要大时,只调整垂直方向组件的大小
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0;
gbc.weighty = 0;
gbc.weightx = 0;
add(new JLabel("发送地址:"), gbc, 0, 0, 1, 1);
gbc.weightx = 100;
from = new JTextField(20);
add(from, gbc, 1, 0, 1, 1);
gbc.weightx = 0;
add(new JLabel("收件地址:"), gbc, 0, 1, 1, 1);
gbc.weightx = 100;
to = new JTextField(20);
add(to, gbc, 1, 1, 1, 1);
gbc.weightx = 0;
add(new JLabel("SMTP服务器:"), gbc, 0, 2, 1, 1);
gbc.weightx = 100;
smtpServer = new JTextField(20);
add(smtpServer, gbc, 1, 2, 1, 1);
gbc.fill = GridBagConstraints.BOTH;
gbc.weighty = 100;
message = new JTextArea();
add(new JScrollPane(message), gbc, 0, 3, 2, 1);
response = new JTextArea();
add(new JScrollPane(response), gbc, 0, 4, 2, 1);
gbc.weighty = 0;
JButton sendButton = new JButton("发送");
sendButton.addActionListener(this);
JPanel buttonPanel = new JPanel();
buttonPanel.add(sendButton);
add(buttonPanel, gbc, 0, 5, 2, 1);
}
private void add(Component c, GridBagConstraints gbc, int x, int y, int w,
int h) {
gbc.gridx = x;
gbc.gridy = y;
gbc.gridwidth = w;
gbc.gridheight = h;
getContentPane().add(c, gbc);
}
public void actionPerformed(ActionEvent evt) {
// 异步机制,使得当所有的awt事件发生后才进行以下工作
SwingUtilities.invokeLater(new Runnable() {
public void run() {
sendMail();
}
});
}
public void sendMail() {
try {
Socket s = new Socket(smtpServer.getText(), 25);
out = new PrintWriter(s.getOutputStream());
in = new BufferedReader(new InputStreamReader(s.getInputStream()));
String hostName = InetAddress.getLocalHost().getHostName();
send(null);
// 传送本机域名
send("HELO " + hostName);
// 传送发信者信箱名称
send("MAIL FROM: " + from.getText());
// 传送收信者信箱名称
send("RCPT TO: " + to.getText());
// 发送信箱数据,包括信头和信体
send("DATA");
out.println(message.getText());
// 发送结束标志
send(".");
s.close();
} catch (IOException exception) {
response.append("Error: " + exception);
}
}
public void send(String s) throws IOException {
if (s != null) {
response.append(s + "\n");
out.println(s);
out.flush();
}
String line;
if ((line = in.readLine()) != null)
response.append(line + "\n");
}
}