J2EE
JavaMail - Connecting GMail using POP3 with SSL
Tips:Remember to replace with your gmail account and password.
import java.util.Date;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.FetchProfile;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Part;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.URLName;
import javax.mail.internet.ContentType;
import javax.mail.internet.ParseException;
import com.sun.mail.pop3.POP3SSLStore;
public class GmailUtilities {
private Session session = null;
private Store store = null;
private String username, password;
private Folder folder;
public GmailUtilities() {
}
public void setUserPass(String username, String password) {
this.username = username;
this.password = password;
}
public void connect() throws Exception {
String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
Properties pop3Props = new Properties();
pop3Props.setProperty("mail.pop3.socketFactory.class", SSL_FACTORY);
pop3Props.setProperty("mail.pop3.socketFactory.fallback", "false");
pop3Props.setProperty("mail.pop3.port", "995");
pop3Props.setProperty("mail.pop3.socketFactory.port", "995");
URLName url = new URLName("pop3", "pop.gmail.com", 995, "",
username, password);
session = Session.getInstance(pop3Props, null);
store = new POP3SSLStore(session, url);
store.connect();
}
public void openFolder(String folderName) throws Exception {
// Open the Folder
folder = store.getDefaultFolder();
folder = folder.getFolder(folderName);
if (folder == null) {
throw new Exception("Invalid folder");
}
// try to open read/write and if that fails try read-only
try {
folder.open(Folder.READ_WRITE);
} catch (MessagingException ex) {
folder.open(Folder.READ_ONLY);
}
}
public void closeFolder() throws Exception {
folder.close(false);
}
public int getMessageCount() throws Exception {
return folder.getMessageCount();
}
public int getNewMessageCount() throws Exception {
return folder.getNewMessageCount();
}
public void disconnect() throws Exception {
store.close();
}
public void printMessage(int messageNo) throws Exception {
System.out.println("Getting message number: " + messageNo);
Message m = null;
try {
m = folder.getMessage(messageNo);
dumpPart(m);
} catch (IndexOutOfBoundsException iex) {
System.out.println("Message number out of range");
}
}
public void printAllMessageEnvelopes() throws Exception {
// Attributes & Flags for all messages ..
Message[] msgs = folder.getMessages();
// Use a suitable FetchProfile
FetchProfile fp = new FetchProfile();
fp.add(FetchProfile.Item.ENVELOPE);
folder.fetch(msgs, fp);
for (int i = 0; i < msgs.length; i++) {
System.out.println("--------------------------");
System.out.println("MESSAGE #" + (i + 1) + ":");
dumpEnvelope(msgs[i]);
}
}
public void printAllMessages() throws Exception {
// Attributes & Flags for all messages ..
Message[] msgs = folder.getMessages();
// Use a suitable FetchProfile
FetchProfile fp = new FetchProfile();
fp.add(FetchProfile.Item.ENVELOPE);
folder.fetch(msgs, fp);
for (int i = 0; i < msgs.length; i++) {
System.out.println("--------------------------");
System.out.println("MESSAGE #" + (i + 1) + ":");
dumpPart(msgs[i]);
}
}
public static void dumpPart(Part p) throws Exception {
if (p instanceof Message)
dumpEnvelope((Message)p);
Object content = p.getContent();
System.out.println(content);
String ct = p.getContentType();
try {
pr("CONTENT-TYPE: " + (new ContentType(ct)).toString());
} catch (ParseException pex) {
pr("BAD CONTENT-TYPE: " + ct);
}
/*
* Using isMimeType to determine the content type avoids
* fetching the actual content data until we need it.
*/
if (p.isMimeType("text/plain")) {
pr("This is plain text");
pr("---------------------------");
System.out.println((String)p.getContent());
} else {
// just a separator
pr("---------------------------");
}
}
public static void dumpEnvelope(Message m) throws Exception {
pr(" ");
Address[] a;
// FROM
if ((a = m.getFrom()) != null) {
for (int j = 0; j < a.length; j++)
pr("FROM: " + a[j].toString());
}
// TO
if ((a = m.getRecipients(Message.RecipientType.TO)) != null) {
for (int j = 0; j < a.length; j++) {
pr("TO: " + a[j].toString());
}
}
// SUBJECT
pr("SUBJECT: " + m.getSubject());
// DATE
Date d = m.getSentDate();
pr("SendDate: " +
(d != null ? d.toString() : "UNKNOWN"));
}
static String indentStr = " ";
static int level = 0;
/**
* Print a, possibly indented, string.
*/
public static void pr(String s) {
System.out.print(indentStr.substring(0, level * 2));
System.out.println(s);
}
public static void main(String[] args) {
try {
GmailUtilities gmail = new GmailUtilities();
gmail.setUserPass("your gmail account name","your password");
gmail.connect();
gmail.openFolder("INBOX");
int totalMessages = gmail.getMessageCount();
int newMessages = gmail.getNewMessageCount();
System.out.println("Total messages = " + totalMessages);
System.out.println("New messages = " + newMessages);
System.out.println("-------------------------------");
//gmail.printAllMessageEnvelopes();
gmail.printAllMessages();
gmail.closeFolder();
} catch(Exception e) {
e.printStackTrace();
// System.exit(-1);
}
}
}
JavaMail: Send HTML Mail Using Gmail's SMTP Server
public static void htmlMail(String from, String password, String to,
String subject, String body) throws Exception {
String host = "smtp.gmail.com";
Properties props = System.getProperties();
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", host);
props.put("mail.smtp.user", from);
props.put("mail.smtp.password", password);
props.put("mail.smtp.port", "587");
props.put("mail.smtp.auth", "true");
Session mailSession = Session.getDefaultInstance(props, null);
// mailSession.setDebug(true);
MimeMessage message = new MimeMessage(mailSession);
message.setSubject(subject);
message.setFrom(new InternetAddress(from));
message.setContent(body, "text/html");
InternetAddress toAddress = new InternetAddress(to);
message.addRecipient(Message.RecipientType.TO, toAddress);
Transport transport = mailSession.getTransport("smtp");
transport.connect(host, from, password);
transport.sendMessage(message, message.getAllRecipients());
transport.close();
}
JavaMail: Send Plain Mail Using Gmail's SMTP Server
public static void simpleMail(String from, String password, String to,
String subject, String body) throws Exception {
String host = "smtp.gmail.com";
Properties props = System.getProperties();
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", host);
props.put("mail.smtp.user", from);
props.put("mail.smtp.password", password);
props.put("mail.smtp.port", "587");
props.put("mail.smtp.auth", "true");
Session session = Session.getDefaultInstance(props, null);
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
InternetAddress toAddress = new InternetAddress(to);
message.addRecipient(Message.RecipientType.TO, toAddress);
message.setSubject(subject);
message.setText(body);
Transport transport = session.getTransport("smtp");
transport.connect(host, from, password);
transport.sendMessage(message, message.getAllRecipients());
transport.close();
}