java web邮件发送实例

        邮件发送工具类，这里使用了多个发送者进行轮询，每次选择发送频次最低的发送者进行发送，目的是为了防止同一发送方发送的过于频繁被屏蔽。使用的java mail版本是1.4.7

        maven配置如下：

<dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.4.7</version>
</dependency>

        发送方封装类

 

package com.special.utils.mail;

/**
 * file MailInfo
 * 邮件发送者的模型，实现comparable接口，根据发送次数比较大小
 *
 * @author ds
 * @version 1.0 2015
 *          date 15-3-9
 */
public class MailInfo implements Comparable<MailInfo> {
    /**
     * 发送的主机地址
     */
    String hostName;
    /**
     * 发送人邮箱
     */
    String userName;
    /**
     * 发送人邮箱密码
     */
    String password;
    /**
     * 该发送方发送邮件次数
     */
    Integer count = 0;

    public int compareTo(MailInfo other) {
        int o = other.getCount() == null ? 0 : other.getCount();
        return count - o;
    }

    /**
     * 邮件发送类型
     */
    enum MailType {
        HTML,
        TEXT
    }

    /**
     * 无参构造函数
     */
    public MailInfo() {
    }

    /**
     * 含参数构造函数
     *
     * @param hostName 服务器主机SMTP地址
     * @param userName 发送者邮箱
     * @param password 发送者邮箱密码
     */
    public MailInfo(String hostName, String userName, String password) {
        this.hostName = hostName;
        this.userName = userName;
        this.password = password;
    }

    public String getHostName() {
        return hostName;
    }

    public void setHostName(String hostName) {
        this.hostName = hostName;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Integer getCount() {
        return count;
    }

    public void setCount(Integer count) {
        this.count = count;
    }

    public String toString() {
        return hostName + ":" + userName + ":" + count;
    }

}

          邮件发送类

package com.special.utils.mail;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import java.util.*;

/**
 * file MailUtil
 * 使用JAVA mail进行邮件发送的工具类
 *
 * @author ds
 * @version 1.0 2015
 *          date 15-3-9
 */
public class MailUtil {
    protected static Log logger = LogFactory.getLog("com.special.utils.mail.MailUtil");
    /**
     * 存放发送方信息
     */
    private static List<MailInfo> mailFromList = new ArrayList<MailInfo>();

    /**
     * 标记初始化发送方信息
     */
    private static boolean flag = true;
    /**
     * 邮件发送发生异常后重复发送的次数
     */
    private static Integer exceptionCount = 5;

    /**
     * 初始化发送方信息
     *
     * @param list 发送方列表
     */
    public static void init(List<MailInfo> list) {
        if (flag) {
            mailFromList = list;
            flag = false;
        }
    }

    /**
     * 发送邮件
     *
     * @param subject 邮件主题
     * @param type    邮件类型，html或者文本
     * @param content 邮件内容
     * @param to      收件人，有逗号隔开
     * @param cc      抄送，逗号隔开
     * @param bcc     暗送，逗号隔开
     * @return boolean true 发送成功 false 发送失败
     */
    public static boolean send(String subject, MailInfo.MailType type, String content, String to, String cc, String bcc) {
        boolean result = true;
        //首先列表排序
        Collections.sort(mailFromList);
        //获取发送频率最小的一个值
        final MailInfo mailInfo = mailFromList.get(0) == null ? new MailInfo() : mailFromList.get(0);
        logger.info(mailInfo.toString());
        /**
         * 每使用一次mail服务器就递增一次发送次数，而不是发送成功之后才递增，
         * 这样做的目的是避免某一台mail服务器故障后无法发送邮件但永远频次最低，
         * 故永远选择这台故障机发送，所带来的问题
         */
        mailInfo.setCount(mailInfo.getCount() + 1);
        // 以下为发送程序，用户无需改动
        Properties props = new Properties();
        props.put("mail.smtp.host", mailInfo.getHostName());
        //身份验证，一般邮件服务器都需要身份验证
        props.put("mail.smtp.auth", "true");
        Session ssn = Session.getInstance(props, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(mailInfo.getUserName(), mailInfo.getPassword());    //To change body of overridden methods use File | Settings | File Templates.
            }

        });
        MimeMessage message = new MimeMessage(ssn);
        InternetAddress fromAddress;
        try {
            fromAddress = new InternetAddress(mailInfo.getUserName());
            message.setFrom(fromAddress);
            //收件人，以逗号隔开
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to, false));
            //抄送，以逗号隔开
            if (null != cc && !"".equals(cc)) {
                message.setRecipients(Message.RecipientType.CC, InternetAddress.parse(cc));
            }
            //暗送，逗号隔开
            if (null != bcc && !"".equals(bcc)) {
                message.setRecipients(Message.RecipientType.BCC, InternetAddress.parse(bcc));
            }
            message.setSubject(subject);
            switch (type) {
                case HTML:
                    MimeBodyPart mbp = new MimeBodyPart();
                    // 设定邮件内容的类型为 text/plain 或 text/html
                    mbp.setContent(content, "text/html;charset=UTF-8");
                    Multipart mp = new MimeMultipart();
                    mp.addBodyPart(mbp);
                    message.setContent(mp);
                    break;
                case TEXT:
                    //发送文本邮件
                    message.setText(content);
                    break;
            }
            message.setSentDate(new Date());
            //发送邮件，还有另外一种写法
            /*Transport transport = ssn.getTransport("smtp");
            transport.connect(mailInfo.getHostName(), mailInfo.getUserName(), mailInfo.getPassword());
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();*/
            Transport.send(message);
            logger.info("mail send successfully from " + mailInfo.getUserName() + " to " + to + " and cc to " + cc);
        } catch (Exception e) {
            result = false;
            synchronized (exceptionCount) {
                if (exceptionCount <= 0) {
                    exceptionCount = 5;
                } else {
                    exceptionCount--;
                    if (send(subject, type, content, to, cc, bcc)) {
                        result = true;
                        exceptionCount = 5;
                    }
                    logger.info("mail send failure ,from " + mailInfo.getUserName() + " to " + to);
                }
            }
            e.printStackTrace();
        }

        return result;
    }

    public boolean test() {
        boolean r = true;
        try {
            logger.info(1 / 0);
        } catch (Exception e) {
            r = false;
            e.printStackTrace();
        }
        return r;
    }

    public static void main(String[] args) {
        MailInfo info;
        String hostName = "mail.sino****.com.cn";
        info = new MailInfo(hostName, "[e-mail]", "pwd1");
        mailFromList.add(info);
        info = new MailInfo(hostName, "[e-mail]", "pwd");
        mailFromList.add(info);


        boolean r = MailUtil.send("test", MailInfo.MailType.HTML, "<div style=\"color:red\">from new mail test</div>", "8****@qq.com", "", "");
        logger.info(r);
    }
}