java简易版email邮箱发送邮件

1. 首先是引入jar包，activation.jar和mail.jar(在资源中已上传了这两个包)。

2. 紧接着是发送用户的邮箱和开通邮箱smtp的密钥，关于开通邮箱smtp的方法自己去百度一下哈。

3. public static class MailAuthenticator extends Authenticator {
           private String strUser;
           private String strPwd;
   
           public MailAuthenticator() {
               super();
           }
   
           @Override
           public PasswordAuthentication getPasswordAuthentication() {
               String username = this.strUser;
               String password = this.strPwd;
               if ((username != null) && (username.length() > 0) && (password != null) && (password.length() > 0)) {
   
                   return new PasswordAuthentication(username, password);
               }
   
               return null;
           }
   
           public MailAuthenticator(String user, String password) {
               this.strUser = user;
               this.strPwd = password;
           }
       }

    

4. 紧接着是调用方法，我将电子信箱的一些配置做在数据库中，这样可以灵活的进行配置。参数to是指接收邮件的邮箱，参数content是指邮箱所要发送的内容。关于信箱的一些配置，你们可以自己进行替换补充。

   public String sendMail(String to,String content)throws Exception{
   		if (to !=null){
               String host = (String) CHSApp.getSysParamBykey("email.host"); //发件人使用发邮件的电子信箱服务器
               String from = (String) CHSApp.getSysParamBykey("email.user"); //发邮件的出发地（发件人的信箱）
               String password = (String) CHSApp.getSysParamBykey("email.pwd"); //发邮件的密码
               String subject = (String) CHSApp.getSysParamBykey("email.subject"); //发邮件的主题
               String port = (String) CHSApp.getSysParamBykey("email.smtp.port"); //电子信箱服务器的端口号
               try {
                   Properties properties = System.getProperties();
                   properties.put("mail.smtp.host", host);
                   properties.put("mail.smtp.auth", "true");
                   properties.put("mail.user", from);
                   properties.put("mail.password", password);
                   properties.put("mail.smtp.port", port);
                   properties.put("mail.smtp.starttls.enable", "true");
                   MailAuthenticator mailAuthenticator = new MailAuthenticator(from,password);
                   Session session = Session.getInstance(properties, mailAuthenticator);
                   session.setDebug(true);
                   MimeMessage mimeMessage = new MimeMessage(session);
                   mimeMessage.setFrom(new InternetAddress(from));
                   mimeMessage.addRecipient(Message.RecipientType.TO,
                           new InternetAddress(to));
                   mimeMessage.setSubject(subject);
                   MimeBodyPart mimeBodyPart = new MimeBodyPart();
                   mimeBodyPart.setContent(content, "text/html;charset=utf-8");
                   Multipart multipart = new MimeMultipart();
                   multipart.addBodyPart(mimeBodyPart);
                   mimeMessage.setContent(multipart);
                   mimeMessage.setSentDate(new Date());
                   mimeMessage.saveChanges();
                   Transport.send(mimeMessage);
               }catch (Exception e){
                   e.printStackTrace();
                   return "failure";
               }
               return "success";
   		}else {
   		    return "failure";
           }
   	}