郵件發(fā)送源碼：
SendMail.java
package com.lzw.mail;
import java.util.Arrays;
import java.util.Date;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.NoSuchProviderException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import com.lzw.io.Out;
/**
* 郵件發(fā)送程序
* @author 李趙偉 Create: 2007-12-19
*/
public class SendMail {
private Session session; //會(huì )話(huà)
private Transport transport; //發(fā)送郵件
private User user; //郵件相關(guān)的帳戶(hù)信息
private MailAddress mailAddress; //收件人地址
private MailBody mailBody; //郵件內容
private final String MAIL_SMTP_HOST = "mail.smtp.host";
private final String MAIL_SMTP_AUTH = "mail.smtp.auth";
public SendMail(User user) {
this.user = user;
init();
}
/**
* 初始化<code> Session, Transport </code>
*/
private void init() {
Authenticator auth = new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user.getUsername(), user
.getPassword());
}
};
Properties props = new Properties();
// 設置發(fā)送郵件的郵件服務(wù)器的屬性（這里使用網(wǎng)易的smtp服務(wù)器）
props.put(MAIL_SMTP_HOST, user.getHost());
// 需要經(jīng)過(guò)授權，也就是有戶(hù)名和密碼的校驗，這樣才能通過(guò)驗證（一定要有這一條）
props.put(MAIL_SMTP_AUTH, "true");
// 用剛剛設置好的props對象構建一個(gè)session
session = Session.getDefaultInstance(props, auth);
try {
// 發(fā)送郵件
transport = session.getTransport("smtp");
// 連接服務(wù)器的郵箱
transport.connect(user.getHost(), user.getUsername(), user
.getPassword());
} catch (NoSuchProviderException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
}
Out.pln("與 " + user.getHost() + " 成功建立會(huì )話(huà)");
}
/**
* 設置收件人地址
*
* @param mailAddress
*/
public void setAddress(MailAddress mailAddress) {
this.mailAddress = mailAddress;
}
/**
* 設置郵件內容
*
* @param mailBody
*/
public void setMailBody(MailBody mailBody) {
this.mailBody = mailBody;
}
/**
* 構造郵件的內容
*
* @return
* @throws AddressException
* @throws MessagingException
*/
private Message createMessage() throws AddressException, MessagingException {
// 用session為參數定義消息對象
MimeMessage message = new MimeMessage(session);
// 加載發(fā)件人地址
message.setFrom(new InternetAddress(user.getFrom()));
message.setSentDate(new Date());
// 加載收件人地址
message.addRecipients(Message.RecipientType.TO, getAddress(mailAddress
.getTo()));
if (mailAddress.isHasCC())
message.addRecipients(Message.RecipientType.CC,
getAddress(mailAddress.getCc()));
// 加載標題
message.setSubject(mailBody.getSubject());
if (mailBody.isContentFlag() || mailBody.isAffixFlag()) {
// 向multipart對象中添加郵件的各個(gè)部分內容，包括文本內容和附件
Multipart multipart = new MimeMultipart();
if (mailBody.isContentFlag()) {
// 設置郵件的文本內容
MimeBodyPart contentPart = new MimeBodyPart();
if (mailBody.isMimeContent())
contentPart.setContent(mailBody.getContent(),
"text/html;charset=GBK");
else
contentPart.setText(mailBody.getContent());
multipart.addBodyPart(contentPart);
}
if (mailBody.isAffixFlag()) {
// 添加附件
BodyPart affixBody = new MimeBodyPart();
DataSource source = new FileDataSource(mailBody.getAffix());
// 添加附件的內容
affixBody.setDataHandler(new DataHandler(source));
// 添加附件的標題這里很重要，通過(guò)下面的Base64編碼的轉換可以保證你的
// 中文附件標題名在發(fā)送時(shí)不會(huì )變成亂碼
sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
String fileName = "=?GBK?B?"
+ enc.encode(mailBody.getAffixName().getBytes()) + "?=";
affixBody.setFileName(fileName);
multipart.addBodyPart(affixBody);
}
// 將multipart對象放到message中
message.setContent(multipart);
}
// 保存郵件
message.saveChanges();
return message;
}
/**
* 發(fā)送郵件，包含：郵件正文、（1個(gè)附件）
*
* @param debug
* 調試設置
*/
public void send(boolean debug) {
// 有了這句便可以在發(fā)送郵件的過(guò)程中在console處顯示過(guò)程信息，供調試使
// 用（你可以在控制臺（console)上看到發(fā)送郵件的過(guò)程）
session.setDebug(debug);
try {
Message message = createMessage();
transport.sendMessage(message, message.getAllRecipients());
} catch (AddressException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
}
Out.pln("\n----------------------------------------------------------");
Out.pln("- 郵件成功發(fā)送！");
Out.pln("- TO : " + Arrays.toString(mailAddress.getTo()));
if (mailAddress.isHasCC())
Out.pln("- CC : " + Arrays.toString(mailAddress.getCc()));
Out.pln("----------------------------------------------------------\n");
}
/**
* 關(guān)閉資源
*
* @throws MessagingException
*/
public void close() throws MessagingException {
if (null != transport)
transport.close();
}
public Address[] getAddress(String[] address) throws AddressException {
Address[] addrs = new InternetAddress[address.length];
for (int i = 0; i < address.length; i++)
addrs[i] = new InternetAddress(address[i]);
return addrs;
}
/**
* 測試
*/
public static void main(String[] args) {
String host = "smtp.sina.com";
String username = "";
String password = "";
// String from = "";
String to = "";
// String cc = null;
String subject = "測試";
String content = "<a href=http://www.baidu.com>baidu</a>";
boolean mimeContent = true;
String affix = "d:/temp/temp.txt";
String affixName = "temp.txt";
boolean debug = false;
// String userFile = "user.properties";
// String addressFile = "mailaddress.properties";
SendMail mail = null;
try {
try {
User user = new User(host, username, password);
MailAddress mailAddress = new MailAddress(to);
// User user = new User(userFile);
// MailAddress mailAddress = new MailAddress(SendMail.class
// .getResourceAsStream(addressFile));
MailBody mailBody = new MailBody(subject, content, mimeContent,
affix, affixName);
mail = new SendMail(user);
// for (int i = 0; i < 5; i++) {
// 設置發(fā)件人地址、收件人地址和郵件標題
mail.setAddress(mailAddress);
// 設置要發(fā)送附件的位置和標題
mail.setMailBody(mailBody);
// 設置smtp服務(wù)器以及郵箱的賬號和密碼
mail.send(debug);
// try {
// Thread.sleep(1 * 1000);
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
// mailBody = new MailBody(subject + "_" + (i + 1), content);
// }
} finally {
if (null != mail)
mail.close();
}
} catch (AddressException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
// } catch (IOException e) {
// e.printStackTrace();
}
}
}
使用JavaMail發(fā)送郵件需要注意的地方：
使用免費的郵件服務(wù)器發(fā)送郵件時(shí)，需要對用戶(hù)的身份做驗證；而進(jìn)行身份驗證的過(guò)程又比較消耗時(shí)間，當用戶(hù)需要發(fā)送多封郵件時(shí)如果每次都做身份驗證的話(huà)時(shí)間的消耗是非常大的；
在整個(gè)郵件發(fā)送過(guò)程中Session（會(huì )話(huà)）的建立只需要一次，也就是說(shuō)身份驗證也只做一次就可以了，即Session session = Session. getDefaultInstance(props, auth);
發(fā)送郵件的過(guò)程相對比較簡(jiǎn)單，有一個(gè)需要注意的地方就是連接郵件服務(wù)器時(shí)transport.connect(user.getHost(), user.getUsername(), user.getPassword());也只需要執行一次即可，這個(gè)過(guò)程和身份驗證一樣都需要消耗大量時(shí)間。
該程序只允許發(fā)送帶有一個(gè)附件的郵件；
本文來(lái)自CSDN博客，轉載請標明出處：http://blog.csdn.net/lizhaowei/archive/2007/12/26/1967575.aspx
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