java 邮件发送与带附件的实现方法

java 邮件发送与带附件的实现方法
java邮件发送也一样，可以实现传入的参数有port地址、密码、姓名、谁发、发给谁、主题、正文内容、smtp地址、发送类型
等功能。
方法一

简单的JavaMail邮件发送
dev.firnow.com 时间 ： 2009-04-05 作者：匿名 编辑：sky 点击： 683 [ 评论 ]
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import javax.mail.*;
import java.util.*;
import javax.mail.internet.*;

/**
* @author caoyx
*
*/
public class MailTest {

/**
* 构造方法
*/
public MailTest() {

}

/**

*

*javamail发送测试

*/

public void SendEmailTest() {

Properties props教程 = new Properties();
props.put("mail.smtp.host", "smtp.163.com");

// 允许smtp校验
props.put("mail.smtp.auth", "true");
Session sendMailSession = Session.getInstance(props, null);

try {
Transport transport = sendMailSession.getTransport("smtp");

// 邮箱服务器 登陆邮箱用户名 登陆密码
transport.connect("smtp.163.com", "xxx", "xxx");
Message newMessage = new MimeMessage(sendMailSession);

// 设置mail主题
String mail_subject = "邮件发送测试(mail标题)";
newMessage.setSubject(mail_subject);

// 设置发信人地址
String strFrom = "[email protected]";
strFrom = new String(strFrom.getBytes(), "8859_1");
newMessage.setFrom(new InternetAddress(strFrom));
Address addressFrom[] = {
new InternetAddress("[email protected]"),
new InternetAddress("[email protected] dfgdom") };

// 改变发件人地址
newMessage.addFrom(addressFrom);

// 设置收件人地址
Address addressTo[] = { new InternetAddress("[email protected]") };
newMessage.setRecipients(Message.RecipientType.TO, addressTo);

// 设置mail正文
newMessage.setSentDate(new java.util.Date());

String mail_text = "邮件发送测试.来自: "+strFrom;
newMessage.setText(mail_text);

// 保存发送信息
newMessage.saveChanges();

// 发送邮件
transport.sendMessage(newMessage, newMessage
.getRecipients(Message.RecipientType.TO));

transport.close();

System.out.println("OK");
} catch (Exception e) {
System.out.println(e);
}

}

public static void main(String args[]) throws Exception {
MailTest SEmail = new MailTest();
SEmail.SendEmailTest();
}

}

测试：

在eclipse中创建一个Java Application

引入mail.jar activation.jar

实例二

import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Part;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.URLName;
import javax.mail.internet.InternetAddress;

public class MainClass {

public static void main(String[] args) throws Exception {
URLName server = new URLName("protocol://username@host/foldername");

Session session = Session.getDefaultInstance(new Properties(), new MailAuthenticator());

Folder folder = session.getFolder(server);
if (folder == null) {
System.out.println("Folder " + server.getFile() + " not found.");
System.exit(1);
}
folder.open(Folder.READ_ONLY);

Message[] messages = folder.getMessages();
for (int i = 0; i System.out.println(messages[i].getSize() + " bytes long.");
System.out.println(messages[i].getLineCount() + " lines.");
String disposition = messages[i].getDisposition();
if (disposition == null){
; // do nothing
}else if (disposition.equals(Part.INLINE)) {
System.out.println("This part should be displayed inline");
} else if (disposition.equals(Part.ATTACHMENT)) {
System.out.println("This part is an attachment");
String fileName = messages[i].getFileName();
System.out.println("The file name of this attachment is " + fileName);
}
String description = messages[i].getDescription();
if (description != null) {
System.out.println("The description of this message is " + description);
}
}
folder.close(false);
}
}

class MailAuthenticator extends Authenticator {

public MailAuthenticator() {
}

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

如何使用FileDataSource通过邮件发送一个文件

import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

public class sendfile {

public static void main(String[] args) {
if (args.length != 5) {
System.out.println("usage: java sendfile true|false");
System.exit(1);
}

String to = args[0];
String from = args[1];
String host = args[2];
String filename = args[3];
boolean debug = Boolean.valueOf(args[4]).booleanValue();
String msgText1 = "Sending a file.n";
String subject = "Sending a file";

// create some properties and get the default Session
Properties props = System.getProperties();
props.put("mail.smtp.host", host);

Session session = Session.getInstance(props, null);
session.setDebug(debug);

try {
// create a message
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(from));
InternetAddress[] address = {new InternetAddress(to)};
msg.setRecipients(Message.RecipientType.TO, address);
msg.setSubject(subject);

// create and fill the first message part
MimeBodyPart mbp1 = new MimeBodyPart();
mbp1.setText(msgText1);

// create the second message part
MimeBodyPart mbp2 = new MimeBodyPart();

// attach the file to the message
FileDataSource fds = new FileDataSource(filename);
mbp2.setDataHandler(new DataHandler(fds));
mbp2.setFileName(fds.getName());

// create the Multipart and add its parts to it
Multipart mp = new MimeMultipart();
mp.addBodyPart(mbp1);
mp.addBodyPart(mbp2);

// add the Multipart to the message
msg.setContent(mp);

// set the Date: header
msg.setSentDate(new Date());

// send the message
Transport.send(msg);

} catch (MessagingException mex) {
mex.printStackTrace();
Exception ex = null;
if ((ex = mex.getNextException()) != null) {
ex.printStackTrace();
}
}
}
}