Java Send mail

1. Install the required e-mail jar package

2. Send a simple e-mail

 PackageCom.mylight;Importjava.util.Properties;ImportJava.util.UUID;ImportJavax.mail.Authenticator;ImportJavax.mail.Message;Importjavax.mail.MessagingException;Importjavax.mail.PasswordAuthentication;Importjavax.mail.Session;ImportJavax.mail.Transport;Importjavax.mail.internet.InternetAddress;ImportJavax.mail.internet.MimeMessage; Public classTestmail { Public Static voidMain (string[] args) {//recipient e-mailString to = "****@163.com"; //Sender e-mailString from = "* * * * @qq. com";    Senemail (to, from); }    Private Static voidSenemail (String to, string from) {//specifies that the host sending the message is smtp.qq.com          FinalString host = "smtp.163.com";//QQ Mail Server//Get System Properties          FinalProperties Properties =system.getproperties (); //setting up a mail serverProperties.setproperty ("Mail.smtp.host", host); Properties.put ("Mail.smtp.auth", "true"); //get the default Session object          FinalSession session = Session.getdefaultinstance (properties,NewAuthenticator () { Publicpasswordauthentication getpasswordauthentication () {return NewPasswordauthentication (From, "* * *");//Sender Mail user name, password (authorization password) and login password are different            }           }); Try{             //to create a default MimeMessage object             FinalMimeMessage message =NewMimeMessage (session); //Set from: Header fieldMessage.setfrom (Newinternetaddress (from)); //Set to: Header fieldMessage.addrecipient (Message.RecipientType.TO,Newinternetaddress (to)); //Set Subject: Head header fieldMessage.setsubject ("Verification Code")); //set the message bodyMessage.settext ("Your captcha is:" + string.valueof (Uuid.randomuuid ()). substring (0, 6). toUpperCase ()); //Send Messagetransport.send (message); System.out.println ("Sent Message successfully....from.com"); }Catch(FinalMessagingexception Mex)          {Mex.printstacktrace (); }    }}

3. Send an HTML email

 PackageCom.mylight;Importjava.util.Properties;ImportJavax.mail.Authenticator;ImportJavax.mail.Message;Importjavax.mail.MessagingException;Importjavax.mail.PasswordAuthentication;Importjavax.mail.Session;ImportJavax.mail.Transport;Importjavax.mail.internet.InternetAddress;ImportJavax.mail.internet.MimeMessage; Public classHtmltestemail { Public Static voidMain (string[] args) {//recipient e-mailString to = "****@163.com"; //Sender e-mailString from = "****@163.com"; //specifies that the host sending the message is localhostString host = "Smtp.163.com"; //Get System PropertiesProperties Properties =system.getproperties (); //setting up a mail serverProperties.setproperty ("Mail.smtp.host", host); //Set up validationProperties.put ("Mail.smtp.auth", "true"); //Gets the default Session object. Session session = Session.getdefaultinstance (properties,NewAuthenticator () { Publicpasswordauthentication getpasswordauthentication () {return NewPasswordauthentication (From, "* * *");//Sender Mail user name, password                }        }); Try{             //creates a default MimeMessage object. MimeMessage message =NewMimeMessage (session); //Set from: Header fieldMessage.setfrom (Newinternetaddress (from)); //Set to: Header fieldmessage.addrecipient (Message.RecipientType.TO,Newinternetaddress (to)); //Set Subject: Header fieldMessage.setsubject ("This is the Subject line!"); //send HTML messages to insert HTML tagsMessage.setcontent (",                                "Text/html" ); //Send Messagetransport.send (message); System.out.println ("Sent message successfully ..."); }Catch(Messagingexception Mex) {mex.printstacktrace (); }    }}

4. Send an email with an attachment

 PackageCom.mylight;ImportJava.io.File;Importjava.util.Properties;ImportJavax.activation.DataHandler;ImportJavax.activation.DataSource;ImportJavax.activation.FileDataSource;ImportJavax.mail.Authenticator;ImportJavax.mail.BodyPart;ImportJavax.mail.Message;Importjavax.mail.MessagingException;ImportJavax.mail.Multipart;Importjavax.mail.PasswordAuthentication;Importjavax.mail.Session;ImportJavax.mail.Transport;Importjavax.mail.internet.InternetAddress;ImportJavax.mail.internet.MimeBodyPart;ImportJavax.mail.internet.MimeMessage;ImportJavax.mail.internet.MimeMultipart; Public classFjtestemail { Public Static voidMain (string[] args) {//recipient e-mailString to = "****@163.com"; //Sender e-mailString from = "****@163.com"; //specifies that the host sending the message is localhostString host = "Smtp.163.com"; //Get System PropertiesProperties Properties =system.getproperties (); //setting up a mail serverProperties.setproperty ("Mail.smtp.host", host); //Set up validationProperties.put ("Mail.smtp.auth", "true"); //Gets the default Session object. Session session = Session.getdefaultinstance (properties,NewAuthenticator () { Publicpasswordauthentication getpasswordauthentication () {return NewPasswordauthentication (From, "lcy1992111");               }                      }); Try{             //creates a default MimeMessage object. MimeMessage message =NewMimeMessage (session); //Set from: Header fieldMessage.setfrom (Newinternetaddress (from)); //Set to: Header fieldmessage.addrecipient (Message.RecipientType.TO,Newinternetaddress (to)); //Set Subject: Header fieldMessage.setsubject ("This is the Subject line!"); //Create a message partBodyPart Messagebodypart =NewMimeBodyPart (); //messageMessagebodypart.settext ("This is message body"); //Creating multiple MessagesMultipart Multipart =NewMimemultipart (); //set text message partMultipart.addbodypart (Messagebodypart); //Accessories SectionMessagebodypart =NewMimeBodyPart (); //Path of attachments sentFile File =NewFile ("C:\\users\\sxcd\\desktop\\work\\codecommit.txt"); DataSource Source=Newfiledatasource (file); Messagebodypart.setdatahandler (NewDataHandler (source)); Messagebodypart.setfilename ("Code");                  Multipart.addbodypart (Messagebodypart); //Send Full Messagemessage.setcontent (multipart); //Send Messagetransport.send (message); System.out.println ("Sent message successfully ..."); }Catch(Messagingexception Mex) {mex.printstacktrace (); }    }}

Java Send mail