这个例子是张三同学写给李四mm的一封email情书...

import java.util.Date;

import java.util.Properties; import javax.mail.Address;

import javax.mail.Authenticator;

import javax.mail.Message;

import javax.mail.PasswordAuthentication;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;

/**

*

* @author：Ellrien

* @date: 2013-10-8上午10:26:26

* @version: 1.0

*/

public class EmailSupport {

/**

* 发送普通邮件

*/

// 邮箱服务器

private String host = "smtp.126.com";

// 这个是你的邮箱用户名

private String username = "zhangsan";

// 你的邮箱密码

private String password = "password";

private String mail_head_name = "this is head of this mail";

private String mail_head_value = "this is head of this mail";

//收件人email地址

private String mail_to = "lisi@163.com";

//发件人email地址

private String mail_from = "zhangsan@126.com";

//邮件主题

private String mail_subject = "邮件主题";

//邮件内容

private String mail_body = "邮件内容：李四mm，巴拉巴拉一大堆令李四mm心动的话...";

//发件人名称

private String personalName = "发件人姓名";

/**

* 此段代码用来发送普通电子邮件

*/

public void send() throws Exception {

try {

Properties props = new Properties(); // 获取系统环境

Authenticator auth = new Email_Autherticator(); // 进行邮件服务器用户认证

props.put("mail.smtp.host", host);

props.put("mail.smtp.auth", "true");

Session session = Session.getDefaultInstance(props, auth);

// 设置session,和邮件服务器进行通讯。

MimeMessage message = new MimeMessage(session);

// message.setContent("foobar, "application/x-foobar"); // 设置邮件格式

message.setSubject(mail_subject); // 设置邮件主题

message.setText(mail_body); // 设置邮件正文

message.setHeader(mail_head_name, mail_head_value); // 设置邮件标题

message.setSentDate(new Date()); // 设置邮件发送日期

Address address = new InternetAddress(mail_from, personalName);

message.setFrom(address); // 设置邮件发送者的地址

Address toAddress = new InternetAddress(mail_to); // 设置邮件接收方的地址

message.addRecipient(Message.RecipientType.TO, toAddress);

Transport.send(message); // 发送邮件

System.out.println("send ok!");

} catch (Exception ex) {

ex.printStackTrace();

throw new Exception(ex.getMessage());

}

}

/**

* 用来进行服务器对用户的认证

*/

public class Email_Autherticator extends Authenticator {

public Email_Autherticator() {

super();

}

public Email_Autherticator(String user, String pwd) {

super();

username = user;

password = pwd;

}

public PasswordAuthentication getPasswordAuthentication() {

return new PasswordAuthentication(username, password);

}

}

public static void main(String[] args) {

EmailSupport sendmail = new EmailSupport();

try {

sendmail.send();

} catch (Exception ex) {

}

}

}

需要：javamail.jar，下载地址见下面的评论。