Javamail Study Notes (3). Use SMTP protocol to send emails (all)

Package Org. yangxin. study. JM; import Java. io. file; import Java. io. fileinputstream; import Java. io. filenotfoundexception; import Java. io. fileoutputstream; import Java. io. ioexception; import Java. io. inputstream; import Java. util. date; import Java. util. properties; import javax. activation. datahandler; import javax. activation. datasource; import javax. activation. filedatasource; import javax. mail. address; import javax. Mail. authenticator; import javax. mail. message; import javax. mail. message. recipienttype; import javax. mail. messagingexception; import javax. mail. passwordauthentication; import javax. mail. session; import javax. mail. transport; import javax. mail. internet. internetaddress; import javax. mail. internet. mimebodypart; import javax. mail. internet. mimemessage; import javax. mail. internet. mimemultipart; import javax. mail. I Nternet. mimeutility;/*** use SMTP protocol to send emails */public class sendmailtest {// mail sending protocol private final static string protocol = "SMTP "; // SMTP Mail Server private final static string host = "smtp.sina.com"; // SMTP Mail Server default port private final static string port = "25 "; // whether authentication is required private final static string is_auth = "true"; // whether to enable debug mode (enable debug mode to print the response message that is answered when the client interacts with the server) private Final Static string is_enabled_debug_mod = "true"; // Sender Private Static string from = "xyang0917@sina.com"; // recipient Private Static string to = "xyang0917@163.com "; // initialize the session information Private Static Properties props = NULL; static {props = new properties (); props. setproperty ("mail. transport. protocol ", Protocol); props. setproperty ("mail. SMTP. host ", host); props. setproperty ("mail. SMTP. port ", Port); props. setproperty ("mail. SMTP. auth ", is_auth); props. setpropert Y ("mail. debug ", is_enabled_debug_mod);} public static void main (string [] ARGs) throws exception {// send text mail sendtextemail (); // send simple HTML mail sendhtmlemail (); // send the HTML email sendhtmlwithinnerimageemail () with embedded images; // send the combined message sendmultipleemail (); // send the generated EML email // sendmailforeml ();} /*** send a simple text email */public static void sendtextemail () throws exception {// create a session instance object session = session. getdefaultinstance (props ); // Create the mimemessage Instance Object mimemessage message = new mimemessage (session); // set the sender message. setfrom (New internetaddress (from); // sets the mail subject message. setsubject ("use javamail to send a simple text email"); // set the recipient message. setrecipient (recipienttype. to, new internetaddress (to); // sets the sending time message. setsentdate (new date (); // set the plain text content to the mail body message. settext ("use POP3 protocol to send text mail test !!! "); // Save and generate the final message. savechanges (); // obtain the transport Instance Object transport Transport = session. gettransport (); // open the connection transport. connect ("xyang0917", "123456abc"); // pass the message object to the transport object and send the email to transport. sendmessage (message, message. getallrecipients (); // close the connection to transport. close ();}/*** send simple HTML mail */public static void sendhtmlemail () throws exception {// create session instance object session = session. getinstance (Props, new myauthenticator (); // create the mimemessage Instance Object mimemessage message = new mimemessage (session); // set the message of the mail subject. setsubject ("HTML mail subject"); // sets the sender message. setfrom (New internetaddress (from); // sets the sending time message. setsentdate (new date (); // sets the recipient message. setrecipients (recipienttype. to, internetaddress. parse (to); // set the HTML content to the mail body, specify the MIME type to the text/html type, and specify the character encoding to gbkmessage. setcontent ("<span style = 'color: red; '> HT ML mail test... </span> "," text/html; charset = GBK "); // save and generate the final message. savechanges (); // send the transport email. send (Message);}/*** send an HTML email with embedded images */public static void sendhtmlwithinnerimageemail () throws messagingexception {// create a session instance object session = session. getdefaultinstance (props, new myauthenticator (); // create the mail content mimemessage message = new mimemessage (session); // The mail subject, and specify the message encoding format. setsubject ("h with Embedded Image TML mail "," UTF-8 "); // The sender message. setfrom (New internetaddress (from); // recipient message. setrecipients (recipienttype. to, internetaddress. parse (to); // CC message. setrecipient (recipienttype. CC, new internetaddress ("java_test@sohu.com"); // bcc (not displayed in the recipient list) message. setrecipient (recipienttype. BCC, new internetaddress ("417067629@qq.com"); // send time message. setsentdate (new date (); // create a mimemu with the mime subtype "related" Ltipart object mimemultipart MP = new mimemultipart ("related"); // create a mimebodypart object that represents the body, and add it to the previously created mimemultipart object mimebodypart htmlpart = new mimebodypart (); MP. addbodypart (htmlpart); // create a mimebodypart object that represents image resources and add it to the mimemultipart object created earlier. mimebodypart imagepart = new mimebodypart (); MP. addbodypart (imagepart); // sets the mimemultipart object to the message of the entire email. setcontent (MP); // set the embedded image email body datasource DS = new filedatasou RCE (new file ("resource/firefoxlogo.png"); datahandler DH = new datahandler (DS); imagepart. setdatahandler (DH); imagepart. setcontentid ("firefoxlogo.png"); // you can specify the content ID to reference other email bodies. // create a mimemultipart object with the mime subtype "alternative, mimemultipart htmlmultipart = new mimemultipart ("alternative"); // create a mimebodypart object mimebodypart htmlbodypart = new mimebodypart () that represents the html body (); // cid = androidlogo. gi F refers to the image inside the email, that is, imagepart. setcontentid ("androidlogo.gif"); htmlbodypart of the image saved by the method. setcontent ("<span style = 'color: red; '> This is an HTML email with embedded images !!!  </span> "," text/html; charset = UTF-8 "); htmlmultipart. addbodypart (htmlbodypart); htmlpart. setcontent (htmlmultipart); // save and generate the final message. savechanges (); // send the transport email. send (Message);}/*** send with embedded images, attachments, and multiple recipients (display email name), mail priority, read receipt complete HTML mail */public static void sendmultipleemail () throws exception {string charset = "UTF-8 "; // specify the Chinese encoding format // create a session instance object session = sessio N. getinstance (props, new myauthenticator (); // creates the mimemessage Instance Object mimemessage message = new mimemessage (session); // sets the topic message. setsubject ("use javamail to send a mail test of the hybrid combination type"); // set the sender message. setfrom (New internetaddress (from, "Sina test mailbox", charset); // set the recipient message. setrecipients (recipienttype. to, new address [] {// parameter 1: email address, parameter 2: Name (only the name is displayed on the client, not the email address), parameter 3: name Chinese character string encoding new internetaddress ("java_test@sohu.com", "Michael _ Sohu ", Charset), new internetaddress ("xyang0917@163.com", "_ 163", charset),}); // sets the CC message. setrecipient (recipienttype. CC, new internetaddress ("xyang0917@gmail.com", "Wang Wu _ Gmail", charset); // set BCC message. setrecipient (recipienttype. BCC, new internetaddress ("xyang0917@qq.com", "Zhao liu_qq", charset); // set the sending time message. setsentdate (new date (); // sets the recipient (the default recipient) message when the recipient replies to this email. setreplyto (internetaddress. parse ("\"" + Mimeutility. encodetext ("Tian Qi") + "\" <417067629@qq.com> "); // sets the priority (1: urgent 3: Normal 5: Low) message. setheader ("X-priority", "1"); // read receipt (the recipient will prompt to reply to the sender when reading the email, indicating that the email has been received and read) message. setheader ("disposition-Notification-to", from); // create a mimemultipart object with the mime subtype "mixed, indicates that this is a message of the hybrid combination type mimemultipart mailcontent = new mimemultipart ("mixed"); message. setcontent (mailcontent); // The attachment mimebodypart attach1 = new mimebodypart (); Mimebodypart attach2 = new mimebodypart (); // content mimebodypart mailbody = new mimebodypart (); // Add the attachment and content to the mail mailcontent. addbodypart (attach1); mailcontent. addbodypart (attach2); mailcontent. addbodypart (mailbody); // Appendix 1 (using the JAF framework to read the data source to generate the email body) datasource ds1 = new filedatasource ("resource/earth.bmp "); datahandler dh1 = new datahandler (ds1); attach1.setfilename (mimeutility. encodetext ("earth.bmp"); attach1.setdata Handler (dh1); // Annex 2 datasource ds2 = new filedatasource ("resource/ c.txt .txt"); datahandler DH2 = new datahandler (DS2); handler (DH2); attach2.setfilename (mimeutility. encodetext (" cc.txt .txt"); // The Mail body (Embedded Image + HTML text) mimemultipart body = new mimemultipart ("related"); // The Mail body is also a combination, you need to specify the combined link mailbody. setcontent (body); // The Mail body consists of HTML and images. mimebodypart imgpart = new mimebodypart (); mimebodypart htmlp Art = new mimebodypart (); body. addbodypart (imgpart); body. addbodypart (htmlpart); // body image datasource DS3 = new filedatasource ("resource/firefoxlogo.png"); datahandler DH3 = new datahandler (DS3); imgpart. setdatahandler (DH3); imgpart. setcontentid ("firefoxlogo.png"); // mimemultipart htmlmultipart = new mimemultipart ("alternative"); htmlpart. setcontent (htmlmultipart); mimebodypart htmlcontent = new mime Bodypart (); htmlcontent. setcontent ("<span style = 'color: red'> This is an email I sent using Java mail! "+"  </span> "," text/html; charset = GBK "); htmlmultipart. addbodypart (htmlcontent); // Save the email content and modify the message. savechanges ();/* file EML = buildemlfile (Message); sendmailforeml (EML); * // send the email transport. send (Message);}/*** generate the email content into an EML file * @ Param message the email content */public static file buildemlfile (message) throws messagingexception, filenotfoundexception, ioexception {file = new file ("C :\\" + mimeutility. decodetext (message. getsubject () + ". eml "); message. writeto (New fileoutputstream (File); Return file;}/*** send the locally generated email file */public static void sendmailforeml (File EML) throws exception {// get the mail session = session. getinstance (props, new myauthenticator (); // get the email content, that is, the EML file inputstream generated during the lifetime is = new fileinputstream (EML); mimemessage message = new mimemessage (Session, is); // send the email transport. send (Message);}/*** submit authentication information to the email server */static class myauthenticator extends authenticator {private string username = "xyang0917"; private string Password = "123456abc "; public myauthenticator () {super ();} public myauthenticator (string username, string password) {super (); this. username = username; this. password = PASSWORD ;}@ overrideprotected passwordauthentication getpasswordauthentication () {return New passwordauthentication (username, password );}}}

Test results:

1. Send a text email

2. Send simple HTML emails

3. Send HTML emails with embedded Images

4. Send a hybrid email combination