网上找得，觉得还不错。不过MS看到spring里也有类似的功能，有空的话可以研究一下。
/**
* 文件名称：EMailTool
* 文件描述：
× 产品标识：
× 单元标识：
× 编写人： zhang wei
* 编写时间: 2007-2-25
*/
import javax.mail.*;
import javax.mail.Store;
import javax.mail.internet.*;
import javax.activation.*;
import java.util.*;
import javax.servlet.http.*;
import java.text.SimpleDateFormat;
/**
* todo:
*
* @author zhang wei
* @version 1.0
*/
public class EMailTool
{
private String from;
private String to;
private String user;
private String password;
private String smtpHost;
private String pop3Host;
private String hostName;
public String getFrom()
{
return from;
}
public void setFrom( String from )
{
this.from = from;
}
public String getTo()
{
return to;
}
public void setTo( String to )
{
this.to = to;
}
public String getUser()
{
return user;
}
public void setUser( String user )
{
this.user = user;
}
public String getPassword()
{
return password;
}
public void setPassword( String password )
{
this.password = password;
}
public String getSmtpHost()
{
return smtpHost;
}
public void setSmtpHost( String smtpHost )
{
this.smtpHost = smtpHost;
}
public String getPop3Host()
{
return pop3Host;
}
public void setPop3Host( String pop3Host )
{
this.pop3Host = pop3Host;
}
public String getHostName()
{
return hostName;
}
public void setHostName( String hostName )
{
this.hostName = hostName;
}
public String getSubject()
{
return subject;
}
public void setSubject( String subject )
{
this.subject = subject;
}
public String getContent()
{
return content;
}
public void setContent( String content )
{
this.content = content;
}
public String getFilename()
{
return filename;
}
public void setFilename( String filename )
{
this.filename = filename;
}
private String subject;
private String content;
private String filename;
private void sendMail() throws MessagingException
{
try
{
// this.smtpHost = this.createSmtpHost();
// Get system properties
// Properties props = System.getProperties();
Properties props = new Properties();
// Setup mail server
props.put("mail.smtp.host", this.smtpHost);
props.put("mail.smtp.auth", "true"); //验证
// Get session
Session session = Session.getDefaultInstance(props);
session.setDebug(true);
// Define message
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
//message.setFrom();
message.addRecipient(Message.RecipientType.TO,
new InternetAddress(to));
message.setSubject(this.getSubject());
System.out.println("::"+this.getFilename());
if (this.getFilename() != null)
{
BodyPart messagebodyPart = new MimeBodyPart();
messagebodyPart.setContent(this.getContent(),
"text/html;charset=gb2312");
System.out.println("文件名称:" + this.getFilename());
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messagebodyPart);
messagebodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(this.getFilename());
messagebodyPart.setDataHandler(new DataHandler(source));
messagebodyPart.setFileName(this.getFilename());
multipart.addBodyPart(messagebodyPart);
// message.setContent(this.content, "text/html;charset=gb2312");
message.setContent(multipart);
message.setSentDate(new java.util.Date());
// Send message
message.saveChanges();
Transport transport = session.getTransport("smtp");
transport.connect(this.smtpHost, this.user, this.password);
transport.sendMessage(message,
message.getAllRecipients());
transport.close();
System.out.println("发送成功！");
}
else
{
message.setContent(this.content, "text/html;charset=gb2312");
message.setSentDate(new java.util.Date());
// Send message
message.saveChanges();
Transport transport = session.getTransport("smtp");
transport.connect(this.smtpHost, this.user, this.password);
message.saveChanges();
//transport.sendMessage(message, message.getAllRecipients());
transport.sendMessage(message,
message.getRecipients(Message.
RecipientType.TO));
transport.close();
}
}
catch (Exception e)
{
e.printStackTrace();
throw new MessagingException( e.toString() );
}
}
//sendMail start method
public void startSend() throws MessagingException {
sendMail();
}
}