Send mail via Java code

To send mail in Java, you must import a new package

mail.jar– Core pack of E-mails

activation.jar– encrypt the user and password.

There are three core classes in Mail.jar:

Javax.mail.session– refers to a session with a mail server. Only one on the whole project is available.

Javax.mail.Message (interface)-ready to send data information.

MimeMessage-You can set the type of data information.

transport– it has a way to send a message.

First step; import two jar packages

A second step; send a simple message

@Test Public voidSendMail ()throwsexception{//first step: Declaring the Properties object drop informationProperties prop =NewProperties (); //set which server to connect toProp.setproperty ("Mail.host", "smtp.126.com"); //set whether to validateProp.setproperty ("Mail.smtp.auth", "true"); //Step Two: Declare the user name and passwordAuthenticator auth =NewAuthenticator () {//This adapting returns the user and password objects             Publicpasswordauthentication getpasswordauthentication () {passwordauthentication PA=NewPasswordauthentication ("wj_leaf12345", "1QAZ2WSX"); returnPA;        }        }; ////Step Two: Get the Session objectSession session =session.getdefaultinstance (Prop,auth); //set debug mode for sessionSession.setdebug (true); //Step Three: declaring informationMimeMessage MM1 =NewMimeMessage (session); //Fourth Step: Set Sender emailAddress from =NewInternetAddress ("[Email protected]");        Mm1.setfrom (from); //Fifth Step: Set the recipientMm1.setrecipient (Recipienttype.to,NewInternetAddress ("[Email protected]")); Mm1.setrecipient (recipienttype.cc,NewInternetAddress ("[Email protected]")); Mm1.setrecipient (RECIPIENTTYPE.BCC,NewInternetAddress ("[Email protected]")); //Sixth step: Set the themeMm1.setsubject ("This is mail with Java 3"); Mm1.setcontent ("Hello, this is the mail sent with Java, 3333 try again", "Text/plain;charset=utf-8"); //Seventh Step:transport.send (MM1); }

Step three: Send a message with an extra connection

Mm1.setsubject ("This is a mail sfasdf3 sent with Java");        Mm1.setcontent ("Hello, this is the mail sent with Java, <a href= ' http://www.baidu.com ' > ' Wisdom </a>", "Text/html;charset=utf-8 " );                 // Seventh Step:        Transport.send (MM1);

Fourth step: Attachment of mail

 Public classSendattechmentdemo {@Test Public voidSendFile ()throwsexception{Properties P=NewProperties (); P.setproperty ("Mail.host", "smtp.163.com"); P.setproperty ("Mail.smtp.auth", "true"); Session s= Session.getdefaultinstance (P,NewAuthenticator () {@Override Publicpasswordauthentication getpasswordauthentication () {return NewPasswordauthentication ("wj_leaf12345", "1QAZ2WSX");        }        }); S.setdebug (true); //Statement MimeMessageMimeMessage msg =NewMimeMessage (s); Msg.setfrom (NewInternetAddress ("[Email protected]")); Msg.setrecipient (Recipienttype.to,NewInternetAddress ("[Email protected]")); Msg.setsubject ("Picture of"); //first step: Declaring a multi-processing partMimemultipart mm =NewMimemultipart (); //Step Two: DeclareMimeBodyPart body1 =NewMimeBodyPart (); //Step Three: Set up the character pieceDataSource ds =NewFiledatasource (NewFile ("./img/a.jpg"))); DataHandler DH=NewDataHandler (DS);        Body1.setdatahandler (DH); //You have to set the nameBody1.setfilename (Mimeutility.encodetext ("beauty. jpg"))); MimeBodyPart Body2=NewMimeBodyPart (); //Step Three: Set up the character pieceDataSource DS2 =NewFiledatasource (NewFile ("./img/b.jpg"))); DataHandler DH2=NewDataHandler (DS2);        Body2.setdatahandler (DH2); //You have to set the nameBody2.setfilename (Mimeutility.encodetext ("Beauty 2.jpg")); MimeBodyPart body3=NewMimeBodyPart (); //Step Three: Set up the character pieceDataSource DS3 =NewFiledatasource (NewFile ("./img/m.mp3"))); DataHandler DH3=NewDataHandler (DS3);        Body3.setdatahandler (DH3); //You have to set the nameBody3.setfilename (Mimeutility.encodetext ("The end of the century. mp3")); //add body1 to mmMm.addbodypart (body1);        Mm.addbodypart (BODY2);                Mm.addbodypart (BODY3);                Msg.setcontent (mm); //Sendtransport.send (msg); }}

Send mail via Java code