Java mail entry instance

The first class smtpauth:

 

import javax.mail.Authenticator;import javax.mail.PasswordAuthentication;public class SmtpAuth extends Authenticator {private String username, password;public SmtpAuth(String username, String password) {this.username = username;this.password = password;}protected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication(username, password);}}

The second mail type:

Import Java. util. date; import Java. util. enumeration; import Java. util. hashmap; import Java. util. properties; import Java. util. vector; import javax. activation. datahandler; import javax. activation. filedatasource; import javax. mail. address; import javax. mail. authenticationfailedexception; import javax. mail. message; import javax. mail. messagingexception; import javax. mail. multipart; 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; public class mail {// The name displayed by the sender: Private string displayname; // the recipient's private string to; // the sender's address: Private string from; // SMTP server address private string smtpserver; // Mail User Name private string username; // Mail User Password private string password ;/ /Email Subject name private string subject; // email content private string content; private Boolean ifauth; // whether the server requires Identity Authentication // the file path of the attachment is private string filename = ""; private Vector file = new vector (); // a collection of file names used to save the attachments sent/*** set SMTP server address */Public void setsmtpserver (string smtpserver) {This. smtpserver = smtpserver;}/*** set the sender address */Public void setfrom (string from) {This. from = from;}/*** set the name displayed by the sender */Public void setdisplaynam E (string displayname) {This. displayname = displayname;}/*** sets whether the server requires Identity Authentication */Public void setifauth (Boolean ifauth) {This. ifauth = ifauth;}/*** set the email user name */Public void setusername (string username) {This. username = username;}/*** set the email password */Public void setpassword (string password) {This. password = password;}/*** set receiver */Public void setto (string to) {This. to = to;}/*** set Topic */Public void Sets Ubject (string subject) {This. subject = subject;}/*** set subject content */Public void setcontent (string content) {This. content = content;}/*** this method is used to collect the attachment name */Public void addattachfile (string fname) {file. addelement (fname);} public mail () {}/*** initialize the SMTP server address, Sender's e-mail address, sender's name, user name, password, receiver, subject, and content */public mail (string smtpserver, string from, string displayname, string username, string password, string to, string s Ubject, string content) {This. smtpserver = smtpserver; this. from = from; this. displayname = displayname; this. ifauth = true; this. username = username; this. password = password; this. to = to; this. subject = subject; this. content = content;}/*** initialize the SMTP server address, Sender's e-mail address, sender's name, receiver, subject, and content */public mail (string smtpserver, string from, string displayname, string to, string subject, string content) {This. smtpser Ver = smtpserver; this. from = from; this. displayname = displayname; this. ifauth = false; this. to = to; this. subject = subject; this. content = content;}/*** send email */Public hashmap send () {hashmap map = new hashmap (); map. put ("State", "success"); string message = "the email is sent successfully! "; Session session = NULL; properties props = system. getproperties (); props. put ("mail. SMTP. host ", smtpserver); If (ifauth) {// The server requires authentication props. put ("mail. SMTP. auth "," true "); smtpauth = new smtpauth (username, password); Session = session. getdefaultinstance (props, smtpauth);} else {props. put ("mail. SMTP. auth "," false "); Session = session. getdefaultinstance (props, null);} session. setdebug (true); Transp ORT trans = NULL; try {message MSG = new mimemessage (session); try {address from_address = new internetaddress (from, displayname); MSG. setfrom (from_address);} catch (Java. io. unsupportedencodingexception e) {e. printstacktrace ();} internetaddress [] address = {New internetaddress (to)}; MSG. setrecipients (message. recipienttype. to, address); MSG. setsubject (subject); multipart MP = new mimemultipart (); mimebod Ypart MBP = new mimebodypart (); MBP. setcontent (content. tostring (), "text/html; charset = gb2312"); MP. addbodypart (MBP); If (! File. isempty () {// There is an attachment enumeration efile = file. elements (); While (efile. hasmoreelements () {MBP = new mimebodypart (); filename = efile. nextelement (). tostring (); // select the name of each attachment filedatasource FDS = new filedatasource (filename); // obtain the data source MBP. setdatahandler (New datahandler (FDS); // obtain the attachment and import it to bodypartmbp. setfilename (FDS. getname (); // get the same name as bodypartmp. addbodypart (MBP);} file. removeallelements ();} MSG. SETCO Ntent (MP); // Add the multipart to the Message MSG. setsentdate (new date (); // set the sending date of the mail header // send the mail MSG. savechanges (); Trans = session. gettransport ("SMTP"); Trans. connect (smtpserver, username, password); Trans. sendmessage (MSG, MSG. getallrecipients (); Trans. close ();} catch (authenticationfailedexception e) {map. put ("State", "failed"); message = "failed to send email! Error cause: \ n "+" authentication error! "; E. printstacktrace ();} catch (messagingexception e) {message =" failed to send the email! Error cause: \ n "+ E. getmessage (); map. put ("State", "failed"); E. printstacktrace (); Exception EX = NULL; If (EX = E. getnextexception ())! = NULL) {system. out. println (ex. tostring (); Ex. printstacktrace () ;}// system. out. println ("\ n prompt:" + message); map. put ("message", message); Return map;} public static void main (string [] ARGs) {mail = new mail (); mail. setsmtpserver ("smtp.126.com"); mail. setfrom ("xxx@126.com"); mail. setdisplayname ("test email"); mail. setifauth (true); mail. setusername ("XXX"); mail. setpassword ("yyy"); mail. setto ("654476371@qq.com "); Mail. setsubject ("Haha"); mail. setcontent ("this is the mail content. "); Mail. addattachfile (" F: // Kankan // description .txt "); mail. Send ();}}

With the above two classes, you can.

 

Modify the xxx@126.com for your mailbox account, XXX For the user name, YYY for your mailbox password.