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| import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Message.RecipientType;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Part;
import javax.mail.Session;
import com.sun.mail.pop3.POP3Store;
/**
* A utility class the retrieves e-mail messages from a POP3 server
* @author Ha Minh Nam
*
*/
public class EmailReceiver {
/**
* Retrieves new incoming e-mail messages from inbox of a POP3 account
* @param host host name of the POP3 server
* @param port port number of the server
* @param userName user name of the e-mail account
* @param password password of the e-mail account
* @throws MessagingException
* @throws IOException
*/
public void getEmail(String host, String port, String userName, String password)
throws MessagingException, IOException {
// sets POP3 properties
Properties properties = new Properties();
properties.put("mail.pop3.host", host);
properties.put("mail.pop3.port", port);
// sets POP3S properties
properties.setProperty("mail.pop3.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
properties.setProperty("mail.pop3.socketFactory.fallback", "false");
properties.setProperty("mail.pop3.socketFactory.port", "995");
// connects to the POP3 server
Session session = Session.getDefaultInstance(properties);
POP3Store emailStore = (POP3Store) session.getStore("pop3");
emailStore.connect(userName, password);
Folder emailFolder = emailStore.getFolder("INBOX");
emailFolder.open(Folder.READ_ONLY);
Message[] messages = emailFolder.getMessages();
for (int messageCount = 0; messageCount < messages.length; messageCount++) {
Message aMessage = messages[messageCount];
String senderAddress = aMessage.getFrom()[0].toString();
String subject = aMessage.getSubject();
// parses recipient address in To field
String toAddresses = "";
Address[] listTO = aMessage.getRecipients(RecipientType.TO);
if (listTO != null) {
for (int toCount = 0; toCount < listTO.length; toCount++) {
toAddresses += listTO[toCount].toString() + ", ";
}
}
if (toAddresses.length() > 1) {
toAddresses = toAddresses.substring(0, toAddresses.length() - 2);
}
// parses recipient addresses in CC field
String ccAddresses = "";
Address[] listCC = aMessage.getRecipients(RecipientType.CC);
if (listCC != null) {
for (int ccCount = 0; ccCount < listCC.length; ccCount++) {
ccAddresses = listCC[ccCount].toString() + ", ";
}
}
if (ccAddresses.length() > 1) {
ccAddresses = ccAddresses.substring(0, ccAddresses.length() - 2);
}
String sentDate = aMessage.getSentDate().toString();
String contentType = aMessage.getContentType();
String textMessage = "";
String attachFiles = "";
if (contentType.contains("text/plain") || contentType.contains("text/html")) {
textMessage = aMessage.getContent() != null ? aMessage.getContent().toString() : "";
} else if (contentType.contains("multipart")) {
Multipart multiPart = (Multipart) aMessage.getContent();
int numberOfParts = multiPart.getCount();
for (int partCount = 0; partCount < numberOfParts; partCount++) {
BodyPart part = multiPart.getBodyPart(partCount);
if (Part.ATTACHMENT.equalsIgnoreCase(part.getDisposition())) {
attachFiles += part.getFileName() + ", ";
storeAttachment(part);
} else {
textMessage = part.getContent() != null ? part.getContent().toString() : "";
}
}
if (attachFiles.length() > 1) {
attachFiles = attachFiles.substring(0, attachFiles.length() - 2);
}
}
// prints out the message details
System.out.println("Message #" + messageCount + ":");
System.out.println("\t From: " + senderAddress);
System.out.println("\t To: " + toAddresses);
System.out.println("\t CC: " + ccAddresses);
System.out.println("\t Subject: " + subject);
System.out.println("\t Sent Date: " + sentDate);
System.out.println("\t Message: " + textMessage);
System.out.println("\t Attachments: " + attachFiles);
System.out.println("--------------------------------------");
}
// closes the folder and disconnects from the server
emailFolder.close(false);
emailStore.close();
}
/**
* Saves an attachment part to a file on disk
* @param part a part of the e-mail's multipart content.
* @throws MessagingException
* @throws IOException
*/
private void storeAttachment(BodyPart part) throws MessagingException, IOException {
String destFilePath = "D:/Attachment/" + part.getFileName();
FileOutputStream output = new FileOutputStream(destFilePath);
InputStream input = part.getInputStream();
byte[] buffer = new byte[4096];
int byteRead;
while ((byteRead = input.read(buffer)) != -1) {
output.write(buffer, 0, byteRead);
}
output.close();
}
} |
code source JavaMail
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