maven:

      
     
      javax.mail
       
     
      mail
       
     
      ${javax-mail.version}
      
     
    
      config.properties:
    

######发送邮件配置########## mail.smtp.host = mail.smtp.port=465 mail.smtp.protocol=smtp #######发送方账号和密码 mail.sender.username= mail.sender.password= #######收件人邮箱，多人以逗号(英文)隔开 mail.receive.user=

code: package com.exl.analysis.core.util; import com.exl.framework.common.util.PropertyUtils; import com.exl.framework.log.CustomLogger; import com.sun.mail.util.MailSSLSocketFactory; import javax.activation.DataHandler; import javax.activation.DataSource; import javax.activation.FileDataSource; import javax.mail.*; import javax.mail.internet.*; import java.security.GeneralSecurityException; import java.util.List; import java.util.Properties; public class SendEmailUtil {
      private MimeMessage message;     private String mailHost = "";     private String mailPort = "";     private String mailProtocol = "";     private String sender_username = "";     private String sender_password = "";     // 收件人列表，以","分割     private Properties properties = new Properties();     /*      * 初始化方法      */     public SendEmailUtil(Boolean debug) {
          this.mailHost = PropertyUtils.get("mail.smtp.host");         this.mailPort = PropertyUtils.get("mail.smtp.port");         this.mailProtocol = PropertyUtils.get("mail.smtp.protocol");         this.sender_username = PropertyUtils .get("mail.sender.username");         this.sender_password = PropertyUtils.get("mail.sender.password");     }     /**      * 指定发送邮件      *      * @param subject      *            邮件主题      * @param sendHtml      *            邮件内容      * @param filePath      *            附件列表      * @param receiveUser      *            收件人（多个以英文逗号隔开）      */     public boolean sendEmail(String subject,String sendHtml,List
    
      filePath,String receiveUser){
          Properties prop = new Properties();         // 协议         prop.setProperty("mail.transport.protocol", mailProtocol);         // 服务器         prop.setProperty("mail.smtp.host", mailHost);         // 端口         prop.setProperty("mail.smtp.port", mailPort);         // 使用smtp身份验证         prop.setProperty("mail.smtp.auth", "true");         // 使用SSL，企业邮箱必需！         // 开启安全协议         MailSSLSocketFactory sf = null;         try {
              sf = new MailSSLSocketFactory();             sf.setTrustAllHosts(true);         } catch (GeneralSecurityException e1) {
              System.out.println("开启SSL加密异常！");             e1.printStackTrace();             return false;         }         prop.put("mail.smtp.ssl.enable", "true");         prop.put("mail.smtp.ssl.socketFactory", sf);         Session session = Session.getDefaultInstance(prop, new MyAuthenticator(                 sender_username, sender_password));         // 开启DEBUG模式,在控制台中或日志中有日志信息显示，也就是可以从控制台中看一下服务器的响应信息；         session.setDebug(true);         message = new MimeMessage(session);         try{
              message.setFrom(new InternetAddress(sender_username));             //邮件主题             message.setSubject(subject);             // 向multipart对象中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(sendHtml, "text/html;charset=UTF-8");             multipart.addBodyPart(contentPart);             if (filePath != null && filePath.size() > 0) {
                  for (String filename : filePath) {
                      BodyPart attachmentBodyPart = new MimeBodyPart();                     DataSource source = new FileDataSource(filename);                     attachmentBodyPart.setDataHandler(new DataHandler(                             source));                     // MimeUtility.encodeWord可以避免文件名乱码                     attachmentBodyPart.setFileName(MimeUtility                             .encodeWord(source.getName()));                     multipart.addBodyPart(attachmentBodyPart);                 }                 // 移走集合中的所有元素                 filePath.clear();             }             // 将multipart对象放到message中             message.setContent(multipart);             message.setRecipients(Message.RecipientType.TO,receiveUser);             message.saveChanges();             // 发送             Transport.send(message);             System.out.println("send success!");             return true;         }catch (Exception e){
              return false;         }     } }