太困了,要睡觉了,不多说了,直接放代码.

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package com.syj;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
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;

import javax.mail.BodyPart;
import javax.mail.Multipart;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMultipart;

import com.sun.istack.internal.ByteArrayDataSource;

/**
* <P>
* Title:用java发送邮件的例子
* </P>
*
* <P>
* Description:发送图片附件并在html中使用该图片
* </P>
*
* <P>
* Copyright: Copyright (c) 2007
* </P>
*
* @author 孙钰佳
* @main [email protected]
* @date Jun 10, 2008 12:35:26 AM
*/
public class SendMail {
private static String username = "xxxx";
private static String password = "xxxx";
private static String smtpServer = "smtp.163.com";
private static String fromMailAddress = "[email protected]";
private static String toMailAddress = "[email protected]";

public static void main(String[] args) throws Exception {
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.host", smtpServer);
// 获得邮件会话对象
Session session = Session.getDefaultInstance(props,
new SmtpAuthenticator(username, password));
/** *************************************************** */
// 创建MIME邮件对象
MimeMessage mimeMessage = new MimeMessage(session);
mimeMessage.setFrom(new InternetAddress(fromMailAddress));// 发件人
mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(
toMailAddress));// 收件人
mimeMessage.setSubject("主题");
mimeMessage.setSentDate(new Date());// 发送日期
Multipart mp = new MimeMultipart("related");// related意味着可以发送html格式的邮件
/** *************************************************** */
BodyPart bodyPart = new MimeBodyPart();// 正文
bodyPart.setDataHandler(new DataHandler("测<img src="cid:IMG1" />试",
"text/html;charset=GBK"));// 网页格式
/** *************************************************** */
BodyPart attachBodyPart = new MimeBodyPart();// 普通附件
FileDataSource fds = new FileDataSource("c:/boot.ini");
attachBodyPart.setDataHandler(new DataHandler(fds));
attachBodyPart.setFileName("=?GBK?B?"
+ new sun.misc.BASE64Encoder().encode(fds.getName().getBytes())
+ "?=");// 解决附件名中文乱码
mp.addBodyPart(attachBodyPart);
/** *************************************************** */
MimeBodyPart imgBodyPart = new MimeBodyPart(); // 附件图标
byte[] bytes = readFile("C:/button.gif");
ByteArrayDataSource fileds = new ByteArrayDataSource(bytes,
"application/octet-stream");
imgBodyPart.setDataHandler(new DataHandler(fileds));
imgBodyPart.setFileName("button.gif");
imgBodyPart.setHeader("Content-ID", "<IMG1></IMG1>");// 在html中使用该图片方法src="cid:IMG1"
mp.addBodyPart(imgBodyPart);
/** *************************************************** */
mp.addBodyPart(bodyPart);
mimeMessage.setContent(mp);// 设置邮件内容对象
Transport.send(mimeMessage);// 发送邮件

}

/**
* 读取文件
*
* @param file
* 文件路径
* @return 返回二进制数组
*/
public static byte[] readFile(String file) {
FileInputStream fis = null;
ByteArrayOutputStream bos = null;
try {
fis = new FileInputStream(file);
bos = new ByteArrayOutputStream();
int bytesRead;
byte buffer[] = new byte[1024 * 1024];
while ((bytesRead = fis.read(buffer)) != -1) {
bos.write(buffer, 0, bytesRead);
Arrays.fill(buffer, (byte) 0);
}
} catch (IOException e1) {
e1.printStackTrace();
} finally {
try {
if (bos != null)
bos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return bos.toByteArray();
}
}

/**
* Smtp认证
*/
class SmtpAuthenticator extends Authenticator {
String username = null;
String password = null;

// SMTP身份验证
public SmtpAuthenticator(String username, String password) {
this.username = username;
this.password = password;
}

public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(this.username, this.password);
}

}