Source Code : Download All Email With Attachment Form Gmail Using Java Mail

Download All Email With Attachment Form Gmail Using Java Mail

Code :-
import java.io.*;
import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.*;

public class DownloadEmailWithAttachment {
  public static void main (String args[]) throws Exception {
   
  // gmail pop3 host name   
  String host = "pop.gmail.com";
  // your email id like nayanrami@gmail.com
  String username = "nayanhrstrides@gmail.com"; //Put here Gmail Username without @ sign
  //Your Email Password For Account
  String password = "PASSWORD";

  Session session = Session.getInstance(new Properties(), null);
  Store store = session.getStore("pop3s");
  store.connect(host, username, password);
   
  // Your INBOX Folder --->>
  Folder folder = store.getFolder("INBOX");

  folder.open(Folder.READ_ONLY);

  BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

  Message message[] = folder.getMessages();
  int i,n;
  for(i = 0; i  System.out.println(i + ": " + message[i].getFrom()[0]+ "\t" + message[i].getSubject());
  System.out.println("Want to get the content? [Y to read/Q to end]");
  String ans = "y";
  ans=ans.toLowerCase();
  if ("y".equals(ans)) {
  Object content = message[i].getContent();
  if (content instanceof Multipart) {
  handleMultipart((Multipart)content);
  }
  else {
  handlePart(message[i]);
  }
  }
  else if ("q".equals(ans)) {
  break;
  }
  }
  folder.close(false);
  store.close();
  }

  public static void handleMultipart(Multipart multipart) throws MessagingException, IOException {
  for (int i=0; i  handlePart(multipart.getBodyPart(i));
  }
  }

  public static void handlePart(Part part)  throws MessagingException, IOException {
  String dposition = part.getDisposition();
  String cType = part.getContentType();
  if (dposition == null) {
  System.out.println("Null: "  + cType);
  if ((cType.length() >= 10) && (cType.toLowerCase().substring(0, 10).equals("text/plain"))) {
  part.writeTo(System.out);
  }
  else {
  System.out.println("Other body: " + cType);
  part.writeTo(System.out);
  }
  }
  else if (dposition.equalsIgnoreCase(Part.ATTACHMENT)) {
  System.out.println("Attachment: " + part.getFileName() + " : " + cType);
  saveFile(part.getFileName(), part.getInputStream());
  }
  else if (dposition.equalsIgnoreCase(Part.INLINE)) {
  System.out.println("Inline: " + part.getFileName() +  " : " + cType);
  saveFile(part.getFileName(), part.getInputStream());
  }
  else {  
  System.out.println("Other: " + dposition);
  }
  }
   
  public static void saveFile(String filename,InputStream input) throws IOException {
  if (filename == null) {
  filename = File.createTempFile("MailAttacheFile", ".out").getName();
  }
  System.out.println("downloading attachment...");
  File file = new File(filename);
  for (int i=0; file.exists(); i++) {
  file = new File(filename+i);
  }
  FileOutputStream fos = new FileOutputStream(file);
  BufferedOutputStream bos = new BufferedOutputStream(fos);
  BufferedInputStream bis = new BufferedInputStream(input);
  int fByte;
  while ((fByte = bis.read()) != -1) {
  bos.write(fByte);
  }
  bos.flush();
  bos.close();
  bis.close();
  System.out.println("done attachment...");
  }
}