java实现邮件发送， 抄送及多附件发送

1. 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 = "service@zhuxiongxian.cc"; // 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 = {"10086@qq.com", "xx@zhuxiongxian.cc"};String[] copyto = {"123456@163.com"};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);}
}