java邮件收发

http://blog.csdn.net/ycg01/article/details/1394465

java邮件收发

标签： java import exception null user class

2006-11-18 16:41 1259人阅读评论(0) 收藏举报

一.邮件收发.

以gmail为例.(不知道为啥,用同一个帐户给自己收发,或者用两个帐户同时相互收发,会造成邮件收发混乱.估计与连接,和服务器端处理有关.)正常的收发可以成功.

package cn.edu.nju.vicken;

import java.io.File;

import java.util.ArrayList;

import java.util.Date;

import java.util.Properties;

import javax.activation.DataHandler;

import javax.activation.FileDataSource;

import javax.mail.Authenticator;

import javax.mail.BodyPart;

import javax.mail.FetchProfile;

import javax.mail.Folder;

import javax.mail.Message;

import javax.mail.Multipart;

import javax.mail.PasswordAuthentication;

import javax.mail.Session;

import javax.mail.Store;

import javax.mail.Transport;

import javax.mail.Message.RecipientType;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeBodyPart;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMultipart;

class PopupAuthenticator extends Authenticator{

String username=null;

String password=null;

public PopupAuthenticator(String user,String pass)

{

username = user;

password = pass;

}

public PasswordAuthentication performCheck(String user,String pass)

{

username = user;

password = pass;

return getPasswordAuthentication();

}

protected PasswordAuthentication getPasswordAuthentication()

{

return new PasswordAuthentication(username, password);

}

public class EmailProcessor {

protected String smtp_host = "smtp.gmail.com";

protected String pop3_host = "pop.gmail.com";

protected String pop3_port = "995";

protected String smtp_port = "465";

protected String user = "";

protected String password = "";

private Session mailsessionpop3 = null;

private Session mailsessionsmtp = null;

public EmailProcessor(String user,String password){

this.user = user;

this.password = password;

}

private void createSessionPop3(){

if(mailsessionpop3==null){

Properties props = System.getProperties();

props.put("mail.pop3.host", pop3_host);

props.put("mail.pop3.port", pop3_port);

props.put("mail.pop3.socketFactory.class", "javax.net.ssl.SSLSocketFactory");

props.put("mail.pop3.socketFactory.fallback", "false");

props.put("mail.pop3.socketFactory.port", pop3_port);

PopupAuthenticator popAuthenticator = new PopupAuthenticator(user,password);

mailsessionpop3 = Session.getDefaultInstance(props,popAuthenticator);

}

private void createSessionSmtp(){

if(mailsessionsmtp==null){

Properties props = System.getProperties();

props.put("mail.smtp.host", smtp_host);

props.put("mail.smtp.port", smtp_port);

props.put("mail.smtp.auth","true");

props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");

props.put("mail.smtp.socketFactory.fallback", "false");

props.put("mail.smtp.socketFactory.port", smtp_port);

PopupAuthenticator popAuthenticator = new PopupAuthenticator(user,password);

mailsessionsmtp = Session.getDefaultInstance(props,popAuthenticator);

}

public ArrayList getAllEmail() throws Exception{

createSessionPop3();

ArrayList ret = new ArrayList();

Store store = mailsessionpop3.getStore("pop3");

store.connect();

Folder folder = store.getFolder("INBOX");

folder.open(Folder.READ_ONLY);

Message[] messages = folder.getMessages();

for (int i = 0; i < messages.length; i++) {

ret.add(messages[i].getSubject());

}

return ret;

}

public void sendEmail(String recv,String title,String text,File file) throws Exception{

createSessionSmtp();

MimeMessage mimeMsg =new MimeMessage(mailsessionsmtp);

mimeMsg.setFrom(new InternetAddress(user+"@gmail.com"));

mimeMsg.setRecipients(RecipientType.TO,InternetAddress.parse(recv+"@gmail.com"));

mimeMsg.setSubject(title);

mimeMsg.setSentDate(new Date());

mimeMsg.setText(text);

BodyPart bp = new MimeBodyPart();

FileDataSource fileds = new FileDataSource(file);

bp.setDataHandler(new DataHandler(fileds));

bp.setFileName(fileds.getName());

Multipart mp = new MimeMultipart();;

mp.addBodyPart(bp);

mimeMsg.setContent(mp);

Transport.send(mimeMsg);

}