java实现邮件发送， 抄送及多附件发送

1. 所需的jar包
   mailapi.jar和smtp.jar
   或
   javax-mail-xxx.jar(如javax.mail-1.5.6.jar)
   http://www.oracle.com/technetwork/java/index-138643.html

2. 代码

import java.io.UnsupportedEncodingException;import java.util.Properties;import javax.activation.DataHandler;import javax.activation.FileDataSource;import javax.mail.BodyPart;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 javax.mail.internet.MimeUtility;/** * 邮件管理器 * java 实现邮件的发送， 抄送及多附件 * @author zhuxiongxian * @version 1.0 * @created at 2016年10月8日 下午3:52:11 */public class EmailManager {    public static String username = "[e-mail]"; // 服务邮箱(from邮箱)    public static String password = "yourpassword"; // 邮箱密码    public static String senderNick = "XX科技";   // 发件人昵称    private Properties props; // 系统属性     private Session session; // 邮件会话对象     private MimeMessage mimeMsg; // MIME邮件对象     private Multipart mp;   // Multipart对象,邮件内容,标题,附件等内容均添加到其中后再生成MimeMessage对象     private static EmailManager instance = null;     public EmailManager() {        props = System.getProperties();        props.put("mail.smtp.auth", "true");        props.put("mail.transport.protocol", "smtp");        props.put("mail.smtp.host", "smtp.exmail.qq.com");        props.put("mail.smtp.port", "25");        props.put("username", username);        props.put("password", password);        // 建立会话        session = Session.getDefaultInstance(props);        session.setDebug(false);    }    public static EmailManager getInstance() {        if (instance == null) {            instance = new EmailManager();        }        return instance;     }    /**     * 发送邮件     * @param from 发件人     * @param to 收件人     * @param copyto 抄送     * @param subject 主题     * @param content 内容     * @param fileList 附件列表     * @return     */    public boolean sendMail(String from, String[] to, String[] copyto, String subject, String content, String[] fileList) {        boolean success = true;        try {            mimeMsg = new MimeMessage(session);            mp = new MimeMultipart();             // 自定义发件人昵称            String nick = "";            try {                nick = javax.mail.internet.MimeUtility.encodeText(senderNick);            } catch (UnsupportedEncodingException e) {                e.printStackTrace();            }            // 设置发件人//          mimeMsg.setFrom(new InternetAddress(from));            mimeMsg.setFrom(new InternetAddress(from, nick));            // 设置收件人            if (to != null && to.length > 0) {                String toListStr = getMailList(to);                mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(toListStr));            }            // 设置抄送人            if (copyto != null && copyto.length > 0) {                String ccListStr = getMailList(copyto);                mimeMsg.setRecipients(Message.RecipientType.CC, InternetAddress.parse(ccListStr));             }            // 设置主题            mimeMsg.setSubject(subject);            // 设置正文            BodyPart bp = new MimeBodyPart();             bp.setContent(content, "text/html;charset=utf-8");            mp.addBodyPart(bp);            // 设置附件            if (fileList != null && fileList.length > 0) {                for (int i = 0; i < fileList.length; i++) {                    bp = new MimeBodyPart();                    FileDataSource fds = new FileDataSource(fileList[i]);                     bp.setDataHandler(new DataHandler(fds));                     bp.setFileName(MimeUtility.encodeText(fds.getName(), "UTF-8", "B"));                    mp.addBodyPart(bp);                 }            }            mimeMsg.setContent(mp);             mimeMsg.saveChanges();             // 发送邮件            if (props.get("mail.smtp.auth").equals("true")) {                Transport transport = session.getTransport("smtp");                 transport.connect((String)props.get("mail.smtp.host"), (String)props.get("username"), (String)props.get("password")); //              transport.sendMessage(mimeMsg, mimeMsg.getRecipients(Message.RecipientType.TO)); //              transport.sendMessage(mimeMsg, mimeMsg.getRecipients(Message.RecipientType.CC));                transport.sendMessage(mimeMsg, mimeMsg.getAllRecipients());                transport.close();             } else {                Transport.send(mimeMsg);            }            System.out.println("邮件发送成功");        } catch (MessagingException e) {            e.printStackTrace();            success = false;        } catch (UnsupportedEncodingException e) {            e.printStackTrace();            success = false;        }        return success;    }    /**     * 发送邮件     * @param from 发件人     * @param to 收件人, 多个Email以英文逗号分隔     * @param cc 抄送, 多个Email以英文逗号分隔     * @param subject 主题     * @param content 内容     * @param fileList 附件列表     * @return     */    public boolean sendMail(String from, String to, String cc, String subject, String content, String[] fileList) {        boolean success = true;        try {            mimeMsg = new MimeMessage(session);            mp = new MimeMultipart();             // 自定义发件人昵称            String nick = "";            try {                nick = javax.mail.internet.MimeUtility.encodeText(senderNick);            } catch (UnsupportedEncodingException e) {                e.printStackTrace();            }            // 设置发件人//          mimeMsg.setFrom(new InternetAddress(from));            mimeMsg.setFrom(new InternetAddress(from, nick));            // 设置收件人            if (to != null && to.length() > 0) {                mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));            }            // 设置抄送人            if (cc != null && cc.length() > 0) {                mimeMsg.setRecipients(Message.RecipientType.CC, InternetAddress.parse(cc));             }            // 设置主题            mimeMsg.setSubject(subject);            // 设置正文            BodyPart bp = new MimeBodyPart();             bp.setContent(content, "text/html;charset=utf-8");            mp.addBodyPart(bp);            // 设置附件            if (fileList != null && fileList.length > 0) {                for (int i = 0; i < fileList.length; i++) {                    bp = new MimeBodyPart();                    FileDataSource fds = new FileDataSource(fileList[i]);                     bp.setDataHandler(new DataHandler(fds));                     bp.setFileName(MimeUtility.encodeText(fds.getName(), "UTF-8", "B"));                    mp.addBodyPart(bp);                 }            }            mimeMsg.setContent(mp);             mimeMsg.saveChanges();             // 发送邮件            if (props.get("mail.smtp.auth").equals("true")) {                Transport transport = session.getTransport("smtp");                 transport.connect((String)props.get("mail.smtp.host"), (String)props.get("username"), (String)props.get("password"));                 transport.sendMessage(mimeMsg, mimeMsg.getAllRecipients());                transport.close();             } else {                Transport.send(mimeMsg);            }            System.out.println("邮件发送成功");        } catch (MessagingException e) {            e.printStackTrace();            success = false;        } catch (UnsupportedEncodingException e) {            e.printStackTrace();            success = false;        }        return success;    }    public String getMailList(String[] mailArray) {        StringBuffer toList = new StringBuffer();        int length = mailArray.length;        if (mailArray != null && length < 2) {            toList.append(mailArray[0]);        } else {            for (int i = 0; i < length; i++) {                toList.append(mailArray[i]);                if (i != (length - 1)) {                    toList.append(",");                }            }        }        return toList.toString();    }    public static void main(String[] args) {        String from = username;        String[] to = {"[e-mail]", "[e-mail]"};        String[] copyto = {"[e-mail]"};        String subject = "测试一下";        String content = "这是邮件内容，仅仅是测试，不需要回复.";        String[] fileList = new String[3];        fileList[0] = "d:/zxing.png";        fileList[1] = "d:/urls.txt";        fileList[2] = "d:/surname.txt";        EmailManager.getInstance().sendMail(from, to, copyto, subject, content, fileList);    }}