使用Java Mail Authenticator子类进行用户认证来发送电子邮件示例

]/**
* CrazyItTest
* 使用JavaMail的Authenticator类进行用户认证发送带附件的电子邮件示例
*/
package com.labci.javamail.test;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.Message.RecipientType;
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 javax.mail.internet.MimeUtility;
/**
* @author Bill Tu
* @since May 26, 2011(21:03:36 PM)
*
*/
public class SendEmailTest {
private static final String USERNAME="iwtxokhtd";//用户名
private static final String PASSWORD="123456";//密码
private static final String PROTOCOL="smtp";//邮件传输协议
private static final String HOST="smtp.163.com";//SMTP服务器主机地址

/**
* 客户端程序自己实现Authenticator子类用于用户认证
*/
static class MyAuthenricator extends Authenticator{
String user=null;
String pass="";
public MyAuthenricator(String user,String pass){
this.user=user;
this.pass=pass;
}
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user,pass);
}

}

private static Session getSession(){
Properties mailProps=new Properties();
mailProps.put("mail.smtp.auth", "true");//向SMTP服务器提交用户认证
mailProps.put("mail.transport.protocol", PROTOCOL);//指定发送邮件协议
mailProps.put("mail.host", HOST);//SMTP服务器主机地址

//拿session的时候传入Authenticator子类进行验证
Session session=Session.getDefaultInstance(mailProps,new MyAuthenricator(USERNAME,PASSWORD));
return session;
}

private static void sendEmail(MimeMessage message) throws MessagingException{
//从session中取mail.smtp.protocol指定协议的Transport
Transport transport=getSession().getTransport();
//建立与指定的SMTP服务器的连接
transport.connect();//此时不需要任务参数
//发给所有指定的收件人,若使用message.getAllRecipients()则还包括抄送和暗送的人
transport.sendMessage(message, message.getRecipients(RecipientType.TO));
//关闭连接
transport.close();

/**
* Transport的send静态方法包括了connect,saveChanges,sendMessage,close等一系列操作，
* 但它连接同一个SMTP服务器每发一封邮件给服务器都得重新建立连接和断开连接,
* 虽然使用较方便，但开销较大,不值得推荐。
*/
// Transport.send(message, message.getRecipients(RecipientType.TO));
}

private static MimeMessage getTextMessage(Session session) throws AddressException,
MessagingException, UnsupportedEncodingException{
MimeMessage message=new MimeMessage(session);
String from="iwtxokhtd@163.com";//发送方邮件地址
String to="277515433@qq.com";//接收方邮件地址

String subject="从163发过来的邮件";//邮件主题，注意是中文的

String content="<h1>看看能收到不,JavaMail写的邮件发送程序，带附件哦</h1><img src="cid:my1.jpg" mce_src="cid:my1.jpg"/>";//cid为my1.jpg，下文会设置此cid
message.setFrom(new InternetAddress(from));
message.setRecipient(RecipientType.TO, new InternetAddress(to));
message.setSubject(subject);
message.setSentDate(new Date());//发送时间

MimeBodyPart picBodyPart=getPicBodyPart(content,"F://My头像.jpg");
MimeBodyPart attached1BodyPart=getAttachedBodyPart("F://nginx中文.txt");//注意附件名是中文的
MimeBodyPart attached2BodyPart=getAttachedBodyPart("F://nginx英文.doc");

MimeMultipart mmp=new MimeMultipart("mixed");//MIME消息头组合类型是mixed(html+附件)
mmp.addBodyPart(picBodyPart);
mmp.addBodyPart(attached1BodyPart);
mmp.addBodyPart(attached2BodyPart);

message.setContent(mmp);
message.saveChanges();

return message;

}

/**
* 处理文件名
* 此处是针对Window下的。
* @param filePath
* @return
*/
private static String doHandlerFileName(String filePath){
String fileName=filePath;
if(null !=filePath && !"".equals(filePath)){
fileName=filePath.substring(filePath.lastIndexOf("//")+1);
}
return fileName;
}

private static MimeBodyPart getAttachedBodyPart(String filePath) throws MessagingException,
UnsupportedEncodingException{
MimeBodyPart attached=new MimeBodyPart();
FileDataSource fds=new FileDataSource(filePath);
attached.setDataHandler(new DataHandler(fds));
String fileName=doHandlerFileName(filePath);
attached.setFileName(MimeUtility.encodeWord(fileName));//处理附件文件的中文名问题
return attached;
}

/**
* 处理html加图片的类型(related)
* @param content
* @param picName
* @return
* @throws MessagingException
*/
private static MimeBodyPart getPicBodyPart(String content,String picName) throws MessagingException{
MimeBodyPart contentPart=new MimeBodyPart();

MimeMultipart mmp=new MimeMultipart("related");//此处MIME消息头组合类型为related
MimeBodyPart contented=new MimeBodyPart();
contented.setContent(content,"text/html;charset=gb2312");//因正文内容中有中文

mmp.addBodyPart(contented);

MimeBodyPart picBodyPart=new MimeBodyPart();
FileDataSource fds=new FileDataSource(picName);
picBodyPart.setDataHandler(new DataHandler(fds));
picBodyPart.setContentID("my1.jpg");//设置contentId

mmp.addBodyPart(picBodyPart);

contentPart.setContent(mmp);

return contentPart;
}

public static void main(String[] args) throws AddressException,
MessagingException, FileNotFoundException, IOException {
sendEmail(getTextMessage(getSession()));

}
}