JavaMail开发笔记

开发前要先下载mail.jar,如果用Myeclipse开发会有冲突，因myeclipse中自带有mail.jar,但不好用，解决办法:删除相关 mail类，如我的删除方法是找到myeclipse安装目录
D:\Program Files\Genuitec\Common\plugins\com.genuitec.eclipse.j2eedt.core_8.6.0.me201007292038\data\libraryset \EE_5\javaee.jar，
用7-zip压缩软件打开，删除下面的mail文件夹


像java.net类那样，JavaMail API通过使用授权者类（Authenticator）以用户名、密码的方式访问那些受到保护的资源，在这里“资源”就是指邮件服务器。
在 javax.mail包中可以找到这个JavaMail的授权者类（Authenticator）。在使用Authenticator这个抽象类时，我们必须采用继承该抽象类的方式，
并且该继承类必须具有返回PasswordAuthentication对象（用于存储认证时要用到的用户名、密码）getPasswordAuthentication()方法。并且要在Session中进行注册，
使Session能够了解在认证时该使用哪个类。

账号密码的封装类
package com.tg.email;

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

public class MailAuthenticator extends Authenticator {
    public static String MAIL_USER = "[email protected]";
    
    public static String MAIL_PASSWORD = "888888";

    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(MAIL_USER, MAIL_PASSWORD);
    }
}

邮件发送类 
package com.tg.email;
import java.io.IOException;
import java.util.Date;
import java.util.Properties;
import javax.mail.AuthenticationFailedException;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
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.springframework.stereotype.Component;


public class SendMail{
    private String mailTo = null; // 邮件接收者
    private String mailReply = null; // 邮件回复地址
    private String smtpHost = null; // SMTP服务器
    private boolean debug = false;
    private String subject; // 邮件主题
    private String msgContent; // 邮件内容
    private String messageContentMimeType = "text/html;charset=utf-8"; // 邮件内容格式

    /**
     * 填充邮件相关信息Method
     *
     * @param session
     * @param msg
     * @throws IOException
     * @throws MessagingException
     */
    private void fillMail(MimeMessage msg) throws IOException, MessagingException {
   
    if (mailReply != null) {
        msg.setFrom(new InternetAddress(mailReply));
        System.out.println("发送人Mail地址：" + mailReply);
    } else {
        System.out.println("没有指定发送人邮件地址！");
        return;
    }
    if (mailTo != null) {
        msg.setRecipients(Message.RecipientType.TO, mailTo);
        System.out.println("接收人Mail地址：" + mailTo);
    } else {
        System.out.println("没有指定收件人邮件地址！");
        return;
    }
    msg.setSubject(subject);
    InternetAddress[] replyAddress = { new InternetAddress(mailReply) };
    msg.setReplyTo(replyAddress);

    MimeBodyPart mBodyContent = new MimeBodyPart(); // 设置内容编码和内容
    if (msgContent != null) {
        mBodyContent.setContent(msgContent, messageContentMimeType);
    } else {
        mBodyContent.setContent("", messageContentMimeType);
    }
    Multipart mPart = new MimeMultipart(); // 模拟信息所需邮件内容方法的参数
    mPart.addBodyPart(mBodyContent);
    msg.setContent(mPart);
    msg.setSentDate(new Date());
    }

    @SuppressWarnings("static-access")
    public int sendMail() throws IOException, MessagingException {
    Properties props = System.getProperties(); // JavaMail需要Properties来创建一个session对象，其属性值就是发送邮件的主机
    props.put("mail.smtp.host", smtpHost);
    props.put("mail.smtp.auth", "true");

    Authenticator auth = new MailAuthenticator();
    Session session = Session.getInstance(props, auth); // 创建session对象
    // 启动JavaMail调试功能，可以返回与SMTP服务器交互的命令信息
    // 可以从控制台中看一下服务器的响应信息
    session.setDebug(debug);
    MimeMessage msg = new MimeMessage(session); // 创建模拟邮件信息
    Transport trans = null; // 创建发送对象
    fillMail(msg);

    try {
        trans = session.getTransport("smtp");
        try {

        trans.connect(smtpHost, MailAuthenticator.MAIL_USER, MailAuthenticator.MAIL_PASSWORD);
         System.out.println("smtp服务器连接成功.....");
        } catch (AuthenticationFailedException e) {
         System.out.println("发送邮件失败：错误代码"+e.getMessage());
        return 3;
        } catch (MessagingException e) {
         System.out.println("发送邮件失败：错误代码"+e.getMessage());
        return 3;
        }
        System.out.println("邮件发送中.....");
        trans.send(msg); // 发送邮件
        System.out.println("邮件发送成功！");
        trans.close();
    } catch (MessagingException e) {
        System.out.println("发送邮件失败：错误代码"+e.getMessage());
    } finally {
        try {
        if (trans != null && trans.isConnected()) {
            trans.close();
        }
        } catch (Exception e) {
        System.out.println(e.toString());
        }
    }
    return 0;
    }

    public int sendMail(String smtpHost, String replyAddress, String mailTo, String subject, String content) throws IOException, MessagingException {
    this.smtpHost = smtpHost == null ? "smtp.163.com" : smtpHost;
    this.mailReply = replyAddress == null ? MailAuthenticator.MAIL_USER : replyAddress;
    this.mailTo = mailTo;
    this.subject = subject;
    this.msgContent = content;
    return sendMail();
    }
    public SendMail() {
    }
}
  
     /**
     * main方法测试
     * @param args
      */
    public static void main(String[] args) {
        SendMail sm=new SendMail();
        sm.setSmtpHost("smtp.163.com");
         sm.setMailReply("[email protected]");
         sm.setMailTo("[email protected]");
         sm.setMsgContent("测试邮件，请注意查收，如有问题，请联系开发人员！");
         sm.setSubject("邮件标题");
       try {
            sm.sendMail();
        } catch (IOException e) {
             e.printStackTrace();
        } catch (MessagingException e) {
             e.printStackTrace();
         }
     }
setter和getter可根据需求生成