jar包：
javax.mail-1.5.5.jar
maven配置：
com.sun.mail javax.mail 1.5.5
代码：
package com.test;import java.io.File;import java.util.ArrayList;import java.util.List;import java.util.Properties;import javax.activation.DataHandler;import javax.activation.DataSource;import javax.activation.FileDataSource;import javax.mail.BodyPart;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.apache.log4j.Logger;import com.test.MailAuthenticator;public class SendMail { // 日志记录 private static Logger logger = Logger.getLogger(SendMail.class); public static MailAuthenticator authenticator; private MimeMessage message; private Session session; private Transport transport; private Properties properties = new Properties(); private String mailHost = null; private String sender_username = null; private String sender_password = null; /** * 构造方法 */ public SendMail() { super(); } /** * 供外界调用的发送邮件接口 */ public boolean sendEmail(String title, String content, List receivers, List fileList) { try { // 初始化smtp发送邮件所需参数 initSmtpParams(); // 发送邮件 doSendHtmlEmail(title, content, receivers, fileList); } catch (Exception e) { logger.error(e); } return true; } /** * 初始化smtp发送邮件所需参数 */ private boolean initSmtpParams() { mailHost = "邮箱smtp服务器"; // 邮箱类型不同值也会不同 sender_username = "发件人邮箱"; sender_password = "发件人邮箱密码"; properties.put("mail.smtp.host", mailHost);// mail.envisioncitrix.com properties.put("mail.smtp.auth", "true"); properties.put("mail.transport.protocol", "smtp"); properties.put("mail.smtp.starttls.enable", "true"); properties.put("mail.smtp.ssl.checkserveridentity", "false"); properties.put("mail.smtp.ssl.trust", mailHost); authenticator = new MailAuthenticator(sender_username, sender_password); session = Session.getInstance(properties, authenticator); session.setDebug(false);// 开启后有调试信息 message = new MimeMessage(session); return true; } /** * 发送邮件 */ private boolean doSendHtmlEmail(String title, String htmlContent, List receivers, List fileList) { try { // 发件人 InternetAddress from = new InternetAddress(sender_username); message.setFrom(from); // 收件人(多个) InternetAddress[] sendTo = new InternetAddress[receivers.size()]; for (int i = 0; i < receivers.size(); i++) { sendTo[i] = new InternetAddress(receivers.get(i)); } message.setRecipients(MimeMessage.RecipientType.TO, sendTo); // 邮件主题 message.setSubject(title); // 添加邮件的各个部分内容，包括文本内容和附件 Multipart multipart = new MimeMultipart(); // 添加邮件正文 BodyPart contentPart = new MimeBodyPart(); contentPart.setContent(htmlContent, "text/html;charset=UTF-8"); multipart.addBodyPart(contentPart); // 遍历添加附件 if (fileList != null && fileList.size() > 0) { for (File file : fileList) { BodyPart attachmentBodyPart = new MimeBodyPart(); DataSource source = new FileDataSource(file); attachmentBodyPart.setDataHandler(new DataHandler(source)); attachmentBodyPart.setFileName(file.getName()); multipart.addBodyPart(attachmentBodyPart); } } // 将多媒体对象放到message中 message.setContent(multipart); // 保存邮件 message.saveChanges(); // SMTP验证，就是你用来发邮件的邮箱用户名密码 transport = session.getTransport("smtp"); transport.connect(mailHost, sender_username, sender_password); // 发送邮件 transport.sendMessage(message, message.getAllRecipients()); System.out.println(title + " Email send success!"); } catch (Exception e) { logger.error(e); } finally { if (transport != null) { try { transport.close(); } catch (MessagingException e) { logger.error(e); } } } return true; } /** * 测试main */ public static void main(String[] args) { // 邮件主题 String title = "邮件主题"; // 邮件正文 String htmlContent = "邮件内容"; // 收件人 List receivers = new ArrayList (); receivers.add("收件人邮箱1"); receivers.add("收件人邮箱2"); // 附件 String fileName1 = "附件路径1"; File file1 = new File(fileName1); String fileName2 = "附件路径2"; File file2 = new File(fileName2); List fileList = new ArrayList (); fileList.add(file1); fileList.add(file2); // 执行发送 new SendMail().sendEmail(title, htmlContent, receivers, fileList); }} 代码：
package com.test;import javax.mail.Authenticator;import javax.mail.PasswordAuthentication;/** * 通过账号密码进行身份验证 */public class MailAuthenticator extends Authenticator { private String userName; private String password; 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; } @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(userName, password); } public MailAuthenticator(String username, String password) { this.userName = username; this.password = password; }}