package Mail;

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;


public class SendMail extends Frame {
Label label1 = new Label();
TextField textField1 = new TextField();
Label label2 = new Label();
TextField textField2 = new TextField();
Label label3 = new Label();
TextArea textArea1 = new TextArea();
Label label4 = new Label();
TextField textField3 = new TextField();
Button button1 = new Button();
Button button2 = new Button();

public SendMail() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if(e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
}
}
public static void main(String[] args) {
SendMail sendMail1 = new SendMail();
sendMail1.setSize (400,400);
sendMail1.show (true);
}

private void jbInit() throws Exception {
label1.setBounds(new Rectangle(41, 38, 45, 23));
label1.setText("收信人");
this.setLayout(null);
this.setSize (400,400);
textField1.setBounds(new Rectangle(110, 36, 174, 23));
label2.setBounds(new Rectangle(42, 75, 38, 23));
label2.setText("主题");
textField2.setBounds(new Rectangle(110, 76, 173, 23));
label3.setBounds(new Rectangle(43, 148, 38, 23));
label3.setText("内容");
textArea1.setBounds(new Rectangle(110, 155, 256, 170));
label4.setBounds(new Rectangle(45, 111, 44, 23));
label4.setText("附件");
textField3.setBounds(new Rectangle(110, 115, 173, 23));
button1.setBounds(new Rectangle(70, 348, 88, 24));
button1.setLabel("发送");
button1.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(ActionEvent e) {
button1_actionPerformed(e);
}
});
button2.setBounds(new Rectangle(244, 348, 88, 24));
button2.setLabel("重填");
button2.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(ActionEvent e) {
button2_actionPerformed(e);
}
});
this.add(label1, null);
this.add(textField1, null);
this.add(textField2, null);
this.add(textField3, null);
this.add(textArea1, null);
this.add(label2, null);
this.add(label4, null);
this.add(label3, null);
this.add(button2, null);
this.add(button1, null);
}

void button2_actionPerformed(ActionEvent e) {
textField1.setText ("");
textField2.setText ("");
textField3.setText ("");
textArea1.setText ("");
}

void button1_actionPerformed(ActionEvent e) {
String to,from,subject,message,attachment;
from="toone@mail.com";
to=textField1.getText ();
if(to.trim ().equals ("")){
JOptionPane.showMessageDialog(this, "收信人不能为空!", "错误", JOptionPane.ERROR_MESSAGE);
return;
}
message=textArea1.getText();
attachment=textField3.getText ();
if(message.trim ().equals ("")&&attachment.trim ().equals ("")){
JOptionPane.showMessageDialog(this, "内容和附件不能都为空!", "错误", JOptionPane.ERROR_MESSAGE);
return;
}
if(to.indexOf ("@")==-1) {
JOptionPane.showMessageDialog(this, "无效的收信人地址!", "错误", JOptionPane.ERROR_MESSAGE);
return;
}
subject=textField2.getText ().trim ();
if(subject.equals (""))
if(JOptionPane.showConfirmDialog(this,"你不需要设置主题吗？","系统提示",0)!=0)
return;
File file=new File(attachment);
if(!attachment.equals ("")){
if(!file.isFile ()){
JOptionPane.showMessageDialog(this, "无效的附件名!", "错误", JOptionPane.ERROR_MESSAGE);
return;
}
}
//以上程序是检验输入的有效性

// create some properties and get the default Session
Properties props = System.getProperties();
props.put("mail.smtp.host", "192.168.0.1");
Session session = Session.getDefaultInstance(props, null);
session.setDebug(false);

try{
// create a message
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(from));
InternetAddress[] address = {new InternetAddress(to)};
msg.setRecipients(Message.RecipientType.TO, address);
msg.setSubject(subject);
msg.addHeader ("toone","fangjianhua");
if(attachment.equals ("")){
System.out.println ("This is plain mail");
msg.setText (message);
}
else {
System.out.println ("this is a multipart mail");
// create and fill the first message part
MimeBodyPart mbp1 = new MimeBodyPart();
mbp1.setText(message);

// create the second message part
MimeBodyPart mbp2 = new MimeBodyPart();

// attach the file to the message
FileDataSource fds = new FileDataSource(file);
mbp2.setDataHandler(new DataHandler(fds));
mbp2.setFileName(fds.getName());

// create the Multipart and its parts to it
Multipart mp = new MimeMultipart();
mp.addBodyPart(mbp1);
mp.addBodyPart(mbp2);

// add the Multipart to the message
msg.setContent(mp);
}
msg.setSentDate(new Date());
// send the message
//for(int i=0;i<10;i++)
Transport.send(msg);
//System.out.println ("Send a mail success");
JOptionPane.showMessageDialog(this, "邮件发送成功", "系统提示",JOptionPane.INFORMATION_MESSAGE );
}
catch(Exception ex){
JOptionPane.showMessageDialog(this, "发送邮件失败", "错误", JOptionPane.ERROR_MESSAGE);
}

}
}