JavaMail：阅读 Ubuntu 上的电子邮件

Question

我的 Ubuntu 邮箱中的电子邮件进入了 /var/mail 这样的目录。其中有一个名为 "root" 的文件，其中包含所有收到的电子邮件。我使用 "mail" 命令以更加用户友好的方式访问这些电子邮件。有什么方法可以配置 JavaMail 来阅读这些电子邮件，而不必像解析文本文件一样解析 "root" 电子邮件文件？

Answer 1

下面来自 http://www.tutorialspoint.com/javamail_api/javamail_api_checking_emails.htm 的代码从 POP3 帐户读取电子邮件。

package com.tutorialspoint;

import java.util.Properties;

import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Store;

public class CheckingMails {

   public static void check(String host, String storeType, String user,
      String password) 
   {
      try {

      //create properties field
      Properties properties = new Properties();

      properties.put("mail.pop3.host", host);
      properties.put("mail.pop3.port", "995");
      properties.put("mail.pop3.starttls.enable", "true");
      Session emailSession = Session.getDefaultInstance(properties);

      //create the POP3 store object and connect with the pop server
      Store store = emailSession.getStore("pop3s");

      store.connect(host, user, password);

      //create the folder object and open it
      Folder emailFolder = store.getFolder("INBOX");
      emailFolder.open(Folder.READ_ONLY);

      // retrieve the messages from the folder in an array and print it
      Message[] messages = emailFolder.getMessages();
      System.out.println("messages.length---" + messages.length);

      for (int i = 0, n = messages.length; i < n; i++) {
         Message message = messages[i];
         System.out.println("---------------------------------");
         System.out.println("Email Number " + (i + 1));
         System.out.println("Subject: " + message.getSubject());
         System.out.println("From: " + message.getFrom()[0]);
         System.out.println("Text: " + message.getContent().toString());

      }

      //close the store and folder objects
      emailFolder.close(false);
      store.close();

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

   public static void main(String[] args) {

      String host = "pop.gmail.com";// change accordingly
      String mailStoreType = "pop3";
      String username = "yourmail@gmail.com";// change accordingly
      String password = "*****";// change accordingly

      check(host, mailStoreType, username, password);

   }

}

Answer 2

JavaMail 可以使用 "mbox" provider.

为您解析 Unix 邮件文件

JavaMail：阅读 Ubuntu 上的电子邮件

JavaMail: Read Email on Ubuntu

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