Simple example of a letter of receipt: Simplereceiver

Import javax.mail.*;
Import javax.mail.internet.*;
Import java.util.*;
Import java.io.*;

/**
* A Simple email receiver class.
*/
public class simplereceiver{
/**
* Main method to receive messages from the mail server specified
* As command line arguments.
*/
public static void Main (String args[]) {
try{
String Popserver=args[0];
String Popuser=args[1];
String poppassword=args[2];
Receive (Popserver, Popuser, Poppassword);
}catch (Exception ex) {
System.out.println ("Usage:java com.lotontech.mail.SimpleReceiver" + "Popserver popuser Poppassword");
}
System.exit (0);
}
/**
* "Receive" method to fetch messages and process them.
*/
public static void Receive (String popserver, String popuser, String Poppassword) {
Store Store=null;
Folder Folder=null;
try{
--Get hold of the ' default session--
Properties props = System.getproperties ();
Session session = Session.getdefaultinstance (props, null);
--Get hold's a POP3 message store, and connect to it--
store = Session.getstore ("POP3");
Store.connect (Popserver, Popuser, Poppassword);
--Try to get hold of the default folder--
folder = Store.getdefaultfolder ();
if (folder = = null) throw new Exception ("No default folder");
--... and its INBOX--
folder = Folder.getfolder ("INBOX");
if (folder = = null) throw new Exception ("No POP3 INBOX");
--Open the folder for read only--
Folder.open (folder.read_only);
--Get the message wrappers and process them--
message[] msgs = Folder.getmessages ();
for (int msgnum = 0; msgnum < msgs.length; msgnum++) {
Printmessage (Msgs[msgnum]);
}
}catch (Exception ex) {
Ex.printstacktrace ();
}
finally{
--Close down nicely--
try{
if (Folder!=null) Folder.close (false);
if (store!=null) store.close ();
}catch (Exception ex2) {
Ex2.printstacktrace ();
}
}
}
/**
* "Printmessage ()" method to print a message.
*/
public static void Printmessage (Message message) {
try{
Get the header information
String from= ((internetaddress) message.getfrom () [0]). getpersonal ();
if (from==null) from= (internetaddress) message.getfrom () [0]). getaddress ();
System.out.println ("From:" +from);
String Subject=message.getsubject ();
System.out.println ("SUBJECT:" +subject);
---Get the message part (i.e. the itself)--
Part messagepart=message;
Object content=messagepart.getcontent ();
--or its-a-multipart message-
if (content instanceof Multipart) {
Messagepart= ((Multipart) content). Getbodypart (0);
System.out.println ("[Multipart message]");
}
--Get the content type--
String Contenttype=messagepart.getcontenttype ();
--If The content is plain text, we can print it--
System.out.println ("CONTENT:" +contenttype);
if (Contenttype.startswith ("Text/plain") | |
Contenttype.startswith ("text/html")) {
InputStream is = Messagepart.getinputstream ();
BufferedReader reader=new BufferedReader (New InputStreamReader (IS));
String Thisline=reader.readline ();
while (Thisline!=null) {
System.out.println (Thisline);
Thisline=reader.readline ();
}
}
System.out.println ("-----------------------------");
}catch (Exception ex) {
Ex.printstacktrace ();
}
}
}