Java email sending program (it can be sent to multiple addresses at the same time and can contain attachments)

Email Recipient Program

Import java. util. properties;
Import common. util. email_autherticatorbean;
Import javax. Mail. authenticator;
Import javax. Mail. Internet. internetaddress;
Import org. Apache. commons. Lang. stringutils;
Import javax. Mail. Internet. mimebodypart;
Import javax. Mail. multipart;
Import javax. Activation. filedatasource;
Import javax. Mail. Internet. mimemultipart;
Import javax. Activation. datahandler;
Import javax. Mail. Internet. mimeutility;
Import java. util. date;

/**
* Use the java. Mail email sending program
*/

Public class sendmailtest
{
Public static void main (string [] ARGs)
{
String title = "titletest"; // the title of the sent Email
String from = "sir_znp@163.com"; // send from there
String sendto [] = {"znp@163.net", "sir_znp@163.com"}; // send to there
// The text content of the email, which can contain HTML tags to display as HTML pages
String content = "mail test !!!!!! <Br> <a href = #> AAA </a> ";
// Include the attachment and rename the attachment
String filenames [] = {"F: \ music \ text1.txt,text1.txt", "F: \ music \ text2.txt,text2.txt "};
Try {
// Mailsender = new mailsender ();
Sendmail (title, from, sendto, content, filenames, "text/html; charset = gb2312 ");
} Catch (exception ex) {ex. printstacktrace ();}
}

Public static void Sendmail (string subject, string from, string [] to, string text, string [] filenames, string mimetype) throws exception
{
// Resourcebundle mailprops = resourcebundle. getbundle ("mail"); corresponding parameters can be read from the configuration file
Properties props = new properties ();

String SMTP = "smtp.163.com"; // you can specify the SMTP used to send emails.
String servername = "sir_znp ";
String serverpawd = "123 ";

Javax. Mail. Session mailsession; // mail Session Object
Javax. Mail. Internet. mimemessage mimemsg; // mime email object

Props = java. Lang. system. getproperties (); // obtain the system property object
Props. Put ("mail. SMTP. Host", SMTP); // set the SMTP host
Props. Put ("mail. SMTP. Auth", "true"); // verify the server user name and password
// Verify that the user name and password sent are correct on the server
Email_autherticatorbean myemailauther = new email_autherticatorbean (servername, serverpaswd );
// Set the email session
Mailsession = javax. Mail. session. getinstance (props, (authenticator) myemailauther );
// Set the transmission protocol
Javax. Mail. Transport transport = mailsession. gettransport ("SMTP ");
// Set information such as from and
Mimemsg = new javax. Mail. Internet. mimemessage (mailsession );
If (! Stringutils. isempty (from ))
{
Internetaddress sentfrom = new internetaddress (from );
Mimemsg. setfrom (sentfrom); // sets the sender address.
}

Internetaddress [] sendto = new internetaddress [to. Length];
For (INT I = 0; I <to. length; I ++)
{
System. Out. println ("sent to:" + to [I]);
Sendto [I] = new internetaddress (to [I]);
}

Mimemsg. setrecipients (javax. Mail. Internet. mimemessage. recipienttype. To, sendto );
Mimemsg. setsubject (subject, "gb2312 ");

Mimebodypart messagebodypart1 = new mimebodypart ();
// Messagebodypart. settext (unicodetochinese (text ));
Messagebodypart1.setcontent (text, mimetype );

Multipart = new mimemultipart (); // The attachment transmission format.
Multipart. addbodypart (messagebodypart1 );

For (INT I = 0; I <filenames. length; I ++ ){
Mimebodypart messagebodypart2 = new mimebodypart ();
// Select the name of each attachment
String filename = filenames [I]. Split (",") [0];
System. Out. println ("attachment name:" + filename );
String displayname = filenames [I]. Split (",") [1];
// Obtain the data source
Filedatasource FDS = new filedatasource (filename );
// Obtain the attachment and add it to the bodypart
Messagebodypart2.setdatahandler (New datahandler (FDS ));
// Get the same name as bodypart
// Messagebodypart2.setfilename (displayname );
// Messagebodypart2.setfilename (FDS. getname ());
Messagebodypart2.setfilename (mimeutility. encodetext (displayname ));
Multipart. addbodypart (messagebodypart2 );
}
Mimemsg. setcontent (multipart );
// Set the sending date of the mail header
Mimemsg. setsentdate (new date ());
Mimemsg. savechanges ();
// Send an email
Transport. Send (mimemsg );
Transport. Close ();
}

}

Verification class
Package common. util;
Import javax. Mail. authenticator;
Import javax. Mail. passwordauthentication;
Public class email_autherticatorbean extends authenticator
{
Private string m_username = NULL;
Private string m_userpass = NULL;

Public void setusername (string username)
{
M_username = username;
}

Public void setuserpass (string userpass)
{
M_userpass = userpass;
}

Public email_autherticatorbean (string username, string userpass)
{
Super ();
Setusername (username );
Setuserpass (userpass );

}
Public passwordauthentication getpasswordauthentication ()
{

Return new passwordauthentication (m_username, m_userpass );
}
}