Question

以下代码用于从gmail帐户检索电子邮件。此代码以某种方式适用于我..我可以从主题和地址获取但无法读取邮件内容。谢谢，如果任何人有任何解决方案

    import java.util.Properties;

import javax.mail.Address;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;

/**
* Class reads emails
*
* @author itcuties
*
*/
public class JavaMailReader {

   public static void main(String[] args) {
       readEmails(true);
   }

   /**
    * Method reads emails from the IMAP or POP3 server.
    * @param isImap - if true then we are reading messages from the IMAP server, if no then read from the POP3 server.
    */
   private static void readEmails(boolean isImap) {
       // Create all the needed properties - empty!
       Properties connectionProperties = new Properties();
       // Create the session
       Session session = Session.getDefaultInstance(connectionProperties,null);

       try {
           System.out.print("Connecting to the IMAP server...");
           // Connecting to the server
           // Set the store depending on the parameter flag value
           String storeName = isImap ? "imaps" : "pop3";   
           Store store = session.getStore(storeName);

           // Set the server depending on the parameter flag value
           String server = isImap ? "imap.gmail.com" : "pop3.gmail.com";
           store.connect(server,"coding@gmail.com","P@ssw0rd1");

           System.out.println("done!");

           // Get the Inbox folder
           Folder inbox = store.getFolder("Inbox");

           // Set the mode to the read-only mode
           inbox.open(Folder.READ_ONLY);

           // Get messages
           Message messages[] = inbox.getMessages();

           System.out.println("Reading messages...");

           // Display the messages
           for(Message message:messages) {
               for (Address a: message.getFrom())
                   System.out.println("From:" + a);

               System.out.println("Title: " + message.getSubject());
               System.out.println();
               System.out.println(message.getContent());
               System.out.println("---");
           }

       } catch (Exception e) {
           e.printStackTrace();
       }

   }

}

Answer 1

这是你的问题：

Message#getContent()

因此，一旦你拥有了对象，Object content = message.getContent()，你应该进行实例检查，看看它是String还是Multipart类。即。

Object content = message.getContent()
if ( content instanceof String )
{
    String text = (String) content;
    // Do things
}
else if ( content instanceof Multipart ) 
{
    Multipart multiPart = (Multipart) content;
    // Do things
}

我可以阅读Gmail邮件的内容吗？

1 个答案: