在下载使用javax.mail的jar包时候，注意：
有的jar没有包含sun的实现，只包含了api，这类jar名称通常为javax.mail-api-x.x.x.jar，在使用smtp协议发邮件过程中会报错：
- java.lang.ClassNotFoundException: com.sun.mail.util.MailLogger
另一种jar是包含了sun的实现的，名称通常为javax.mail-x.x.x.jar，使用smtp协议发邮件正常！
示例代码：
- package test.mail;
- import javax.mail.Message;
- import javax.mail.Session;
- import javax.mail.Transport;
- import javax.mail.internet.InternetAddress;
- import javax.mail.internet.MimeMessage;
- import java.util.Date;
- import java.util.Properties;
- public class TestMail {
- public static void sendMail(String fromMail, String user, String password,
- String toMail,
- String mailTitle,
- String mailContent) throws Exception {
- Properties props = new Properties(); //可以加载一个配置文件
- // 使用smtp：简单邮件传输协议
- props.put("mail.smtp.host", "smtp.163.com");//存储发送邮件服务器的信息
- props.put("mail.smtp.auth", "true");//同时通过验证
- Session session = Session.getInstance(props);//根据属性新建一个邮件会话
- // session.setDebug(true); //有他会打印一些调试信息。
- MimeMessage message = new MimeMessage(session);//由邮件会话新建一个消息对象
- message.setFrom(new InternetAddress(fromMail));//设置发件人的地址
- message.setRecipient(Message.RecipientType.TO, new InternetAddress(toMail));//设置收件人,并设置其接收类型为TO
- message.setSubject(mailTitle);//设置标题
- //设置信件内容
- // message.setText(mailContent); //发送 纯文本 邮件 todo
- message.setContent(mailContent, "text/html;charset=gbk"); //发送HTML邮件，内容样式比较丰富
- message.setSentDate(new Date());//设置发信时间
- message.saveChanges();//存储邮件信息
- //发送邮件
- // Transport transport = session.getTransport("smtp");
- Transport transport = session.getTransport();
- transport.connect(user, password);
- transport.sendMessage(message, message.getAllRecipients());//发送邮件,其中第二个参数是所有已设好的收件人地址
- transport.close();
- }
- public static void main(String[] args) throws Exception {
- sendMail("用户名@163.com", "用户", "密码",
- "[email protected]",
- "Java Mail 测试邮件",
- "<a>html 元素</a>：<b>邮件内容</b>");
- }
- }
以上来源：http://blog.csdn.net/conquer0715/article/details/44831851
另：结合以上可以实现一个Email的工具
代码如下：
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.SendFailedException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import org.apache.log4j.Logger;
public class EmailHelper {
private final static String default_charset = "UTF-8";
public static enum EncryptionTypes {
Default, TLS, SSL;
public static EncryptionTypes parseValue(int number){
switch(number){
case 2:
return TLS;
case 3:
return SSL;
default:
return Default;
}
}
public static EncryptionTypes parseValue(String str){
switch(str){
case "2":
return TLS;
case "3":
return SSL;
default:
return Default;
}
}
}
private static Logger logger = Logger.getLogger(EmailHelper.class);
private String mail_host = "";
private int mail_port = 25;
private EncryptionTypes encryptionType = EncryptionTypes.Default;
private String mail_host_account = "";
private String mail_host_password = "";
private boolean isHtml = false;
private boolean isAuth = true;
public EmailHelper(String mail_host, int mail_port, EncryptionTypes encryptionType, String account, String password, boolean isHtml) {
this.mail_host = mail_host;
this.mail_port = mail_port;
this.encryptionType = encryptionType;
this.mail_host_account = account;
this.mail_host_password = password;
this.isHtml = isHtml;
}
public void sendEmail(String senderAddress, String senderName,
String receiverAddress, String sub, String msg) throws Exception {
String[] address = receiverAddress.split(";");
List<String> recipients = new ArrayList<String>();
for (int i = 0; i < address.length; i++) {
if (address[i].trim().length() > 0) {
recipients.add(address[i]);
}
}
this.sendEmail(senderAddress, senderName, recipients, sub, msg);
}
public void sendEmail(String senderAddress, String senderName, List<String> recipients, String sub, String msg)
throws SendFailedException {
logger.debug("mail subject=" + sub + ", mail_port=" + this.mail_port
+ ", encryptionType=" + this.encryptionType + ", auth=" + isAuth
+ ", mail_host_account=" + this.mail_host_account
+ ", mail_host_password=" + this.mail_host_password);
Transport transport = null;
try {
Properties props = this.getProperties();
Session session = this.getSession(props);
MimeMessage message = new MimeMessage(session);
if (this.getDefaultIsHtml()) {
message.addHeader("Content-type", "text/html");
} else {
message.addHeader("Content-type", "text/plain");
}
message.setSubject(sub, default_charset);
message.setFrom(new InternetAddress(senderAddress, senderName));
for (Iterator<String> it = recipients.iterator(); it.hasNext();) {
String email = (String) it.next();
message.addRecipients(Message.RecipientType.TO, email);
}
Multipart mp = new MimeMultipart();
MimeBodyPart contentPart = new MimeBodyPart();
if (this.getDefaultIsHtml()) {
contentPart.setContent(
"<meta http-equiv=Content-Type content=text/html; charset="
+ default_charset + ">" + msg,
"text/html;charset=" + default_charset);
} else {
contentPart.setText(msg, default_charset);
}
mp.addBodyPart(contentPart);
message.setContent(mp);
message.setSentDate(new Date());
if (this.getDefaultEncryptionType() == EncryptionTypes.SSL) {
Transport.send(message);
} else {
transport = session.getTransport("smtp");
transport.connect(this.mail_host, this.mail_port, this.mail_host_account, this.mail_host_password);
transport.sendMessage(message, message.getAllRecipients());
}
logger.debug("Send email successfully by " + this.getDefaultEncryptionType());
} catch (Exception e) {
logger.error("send mail error", e);
} finally {
if (transport != null) {
try {
transport.close();
} catch (Exception ex) {
}
}
}
}
private Properties getProperties() {
Properties props = System.getProperties();
EncryptionTypes defaultEncryptionType = this.getDefaultEncryptionType();
//do not need to authenticate smtp account if the user name and password are not set
if(this.mail_host_account == null || "".equals(this.mail_host_account) || this.mail_host_password == null || "".equals(this.mail_host_password)){
isAuth = false;
props.put("mail.smtp.auth", "false");
} else {
props.put("mail.smtp.auth", "true");
}
props.put("mail.smtp.host", this.mail_host);
if (defaultEncryptionType == EncryptionTypes.TLS) {
props.put("mail.smtp.starttls.enable", "true");
} else if (defaultEncryptionType == EncryptionTypes.SSL) {
props.put("mail.smtp.socketFactory.port", this.mail_port);
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.debug", "true");
props.put("mail.smtp.port", this.mail_port);
}
return props;
}
private Session getSession(Properties props) {
Session session = null;
if (this.getDefaultEncryptionType() == EncryptionTypes.TLS) {
session = Session.getInstance(props);
} else if (this.getDefaultEncryptionType() == EncryptionTypes.SSL) {
session = Session.getInstance(props, new SMTPAuthenticator(this.mail_host_account, this.mail_host_password));
} else {
session = Session.getDefaultInstance(props);
}
return session;
}
private boolean getDefaultIsHtml() {
boolean rst = this.isHtml;
return rst;
}
private class SMTPAuthenticator extends Authenticator {
String user;
String password;
public SMTPAuthenticator(String user, String password) {
this.user = user;
this.password = password;
}
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(this.user, this.password);
}
}
private EncryptionTypes getDefaultEncryptionType() {
EncryptionTypes rst = this.encryptionType;
if (this.encryptionType == EncryptionTypes.Default) {
if (this.mail_port == 465) {
rst = EncryptionTypes.SSL;
} else if (this.mail_port == 587) {
rst = EncryptionTypes.TLS;
}
}
return rst;
}
}