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);
    }
}