Summary of JavaMail Operations (3)

Principle: The message can be seen as a number of parts, such as the body is a part of the attachment is a part, so use BodyPart to set the format of the message
Message.addrecipient (message.recipienttype.to,new internetaddress (mail_to));
BodyPart Messagebodypart = new MimeBodyPart ();
Messagebodypart.settext ("Pardon Ideas");
Multipart Multipart = new Mimemultipart ();
Multipart.addbodypart (Messagebodypart);

Messagebodypart = new MimeBodyPart ();
DataSource Source = new Filedatasource ("./20020423/test.zip")//set of attachments for messages
Messagebodypart.setdatahandler (new DataHandler (source));
Messagebodypart.setfilename ("Test.zip");
Multipart.addbodypart (Messagebodypart);
Message.setcontent (multipart);
Transport.send (message);
System.out.println ("Send ok!");
}
catch (Exception ex)
{
System.out.println ("Faild" +ex);
}

}
This piece of code is used to send messages with attachments
void Jbutton6_actionperformed (ActionEvent e) {
Try
{
Properties props = System.getproperties ();
Authenticator auth = new Email_autherticator ();
Props.put ("Mail.smtp.host", host);
Props.put ("Mail.smtp.auth", "true");
Session session = Session.getdefaultinstance (Props,auth); Establish session
Store store = Session.getstore ("POP3");
Store.connect (Host,username,password);

After connecting to the store,you can get a Folder,which must is opened before you can read messages from it:
Folder folder = Store.getfolder ("INBOX");
Folder.open (Folder.read_write);
Message message[] = Folder.getmessages ();

for (int i=0,n=message.length;i {
Get part of the message, such as head information, the sender's signature, the messenger's e-mail address.
String Out_from_person = ((internetaddress) message[i].getfrom () [0]). getpersonal ();
String out_from_address = ((internetaddress) message[i].getfrom () [0]). getaddress ();
System.out.println ("From:" +out_from_person+ ")";
SYSTEM.OUT.PRINTLN ("Address:" +out_from_address+ ");
String out_subject = Message[i].getsubject ();
System.out.println ("Subject:" +out_subject+ ")";

The following code is used to get body information for a message
Part messagepart = Message[i];
Object out_content = Messagepart.getcontent ();
if (out_content instanceof Multipart)
{
MessagePart = ((Multipart) out_content). Getbodypart (0);
System.out.println ("[Multipart message]");
}
String Out_content_type = Messagepart.getcontenttype ();
System.out.println ("CONTENT:" +out_content_type);

if (Out_content_type.startswith ("Text/plain") | | | out_content_type.startswith ("text/html")
{
InputStream ipstm = Messagepart.getinputstream ();
BufferedReader bufreader = new BufferedReader (new InputStreamReader (ipstm));
String thisline = Bufreader.readline ();
while (Thisline!= null)
{
System.out.println ("Thisline:" +thisline);
Thisline = Bufreader.readline ();
}
}
Get attachments
Multipart MP = (Multipart) message[i].getcontent ();
for (int j=0,m=mp.getcount (); j {
SYSTEM.OUT.PRINTLN ("* * *" +m+ "* * *");
Part part = Mp.getbodypart (j);
String disposition = part.getdisposition ();
if (disposition!= null) && (Disposition.equals (part. Attachment)) | | (Disposition.equals (part. INLINE)))
{

The following code saves the obtained attachment to the current directory, Part.getfilename () as the file name, and is the name of the attachment.
File filename = new file (Part.getfilename ());
for (int k=0;filename.exists (); k++)
{
filename = new File (Part.getfilename () +k);
}
FileOutputStream Myfileoutputstream = new FileOutputStream (filename);
int chunk = Part.getsize ();//the size of the attachment is not necessarily accurate.

byte [] buffer = new Byte[chunk];
InputStream instream = Part.getinputstream ();
Instream.read (Buffer,0,chunk);
Myfileoutputstream.write (Buffer,0,chunk);
Instream.close ();
Myfileoutputstream.close ();
}
}
System.out.println ("------------------------------------------------------------");
Message[i].setflag (flags.flag.deleted,true);
}
Folder.close (TRUE);
Store.close ();//Close
}
catch (Exception ej2)
{
System.out.println (EJ2);
}
}