Java sends e-mail through SMTP

 PackageCom.sm.modules.oa.web;Importjavax.mail.Session;ImportJavax.mail.Transport;Importjavax.mail.internet.InternetAddress;ImportJavax.mail.internet.MimeMessage;Importjava.util.Date;Importjava.util.Properties; Public classSend {//Sender's mailbox and password (replaced by their mailbox and password)//PS: Some mailbox servers in order to increase the security of the mailbox itself password, to the SMTP client set up a separate password (some mailboxes called "Authorization Code"),//for a mailbox with a separate password, the password for the mailbox must be used for this individual password (authorization code).      Public StaticString myemailaccount = "[Email protected]";  Public StaticString Myemailpassword = "abcd2110401"; //the SMTP server address of the sender's mailbox must be accurate, different mail server addresses are different, general (only general, not absolute) format: smtp.xxx.com//NetEase 163 The SMTP server address of the mailbox is: smtp.163.com     Public StaticString myemailsmtphost = "smtp.163.com"; //recipient mailbox (replace with a valid mailbox that you know)     Public StaticString receivemailaccount = "[Email protected]";  Public Static voidMain (string[] args)throwsException {//1. Create parameter configuration to connect to the mail server's parameter configurationProperties props =NewProperties ();//parameter ConfigurationProps.setproperty ("Mail.transport.protocol", "SMTP");//protocol Used (JavaMail specification requirements)Props.setproperty ("Mail.smtp.host", myemailsmtphost);//SMTP server address for sender's mailboxProps.setproperty ("Mail.smtp.auth", "true");//Request Authentication Required//PS: Some mailbox servers require SSL security authentication for SMTP connections (for enhanced security, the mailbox supports SSL connections and can be turned on itself),//If you cannot connect to the mail server, look carefully at the log printed by the console, if there are errors such as "Connection failed, require SSL secure connection" ,//Open the SSL secure connection by opening the comment code between/* ... */.         /*the port of the SMTP server (the port of the non-SSL connection is generally default to 25, can not be added, if the SSL connection is turned on,//The Port of the SMTP server that needs to be the corresponding mailbox, the specific        Can see the corresponding mailbox service Help,//QQ mailbox SMTP (SLL) port 465 or 587, other mailboxes to see for themselves) Final String smtpport = "465";        Props.setproperty ("Mail.smtp.port", Smtpport);        Props.setproperty ("Mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");        Props.setproperty ("Mail.smtp.socketFactory.fallback", "false");        Props.setproperty ("Mail.smtp.socketFactory.port", Smtpport); */        //2. Create a Session object based on the configuration to interact with the mail serverSession session =session.getdefaultinstance (props); Session.setdebug (true);//set to debug mode, you can view detailed send log//3. Create a messageMimeMessage message =Createmimemessage (Session, Myemailaccount, Receivemailaccount); //4. Get mail Transfer objects according to SessionTransport Transport =Session.gettransport (); //5. Use the email account and password to connect to the mail server, where the authenticated mailbox must be consistent with the sender mailbox in the message, otherwise the error//         //ps_01: The key to success or failure in this sentence, if the connection server fails, it will output the log of the corresponding failure reason in the console .//carefully review the reason for the failure, and some mailbox servers will return an error code or see a link to the error type, depending on the given error//type to the corresponding mail server on the help site to see the specific failure reason. //        //ps_02: The reason for the connection failure is usually the following, carefully examining the code://(1) The mailbox does not have SMTP service turned on; //(2) e-mail password error, for example, some mailboxes open a separate password; //(3) The mailbox server requires that SSL secure connection be used; //(4) The request is too frequent or other reasons, the mail server refused service; //(5) If the above points are OK, go to the mail server website to find help. //        //ps_03: Look at log carefully, read the log carefully, read the log, the cause of the error is described in log. Transport.connect (Myemailaccount, Myemailpassword); //6. Send the email to all of the receiving addresses, message.getallrecipients () Get all the recipients that were added when the message object was created, Cc, BCCtransport.sendmessage (Message, message.getallrecipients ()); //7. Close the connectionTransport.close (); }    /*** Create a simple message that contains only text * *@paramsession with server interaction *@paramsendMail Sender Email *@paramreceivemail Recipient Mailbox *@return     * @throwsException*/     Public StaticMimeMessage Createmimemessage (Session session, String SendMail, String receivemail)throwsException {//1. Create a messageMimeMessage message =NewMimeMessage (session); //2. From: the senderMessage.setfrom (NewInternetAddress (SendMail, "x Net", "UTF-8")); //3. To: Recipient (can add multiple recipients, CC, BCC)Message.setrecipient (MimeMessage.RecipientType.TO,NewInternetAddress (Receivemail, "xx user", "UTF-8")); //4. Subject: Mail SubjectMessage.setsubject ("Full 50 percent", "UTF-8"); //5. Content: Message body (HTML tags can be used)Message.setcontent ("xx user Hello, I love you, can I order a little praise of it ..." "," Text/html;charset=utf-8 "); //6. Set the sender timeMessage.setsentdate (NewDate ()); //7. Save Settingsmessage.savechanges (); returnmessage; }}

Java sends e-mail through SMTP