用Java接收带有附件的电子邮件

收到电子邮件后, 我们还可以使用JavaMail API中的Multipart和BodyPart类来接收附件。

为了更好地理解此示例, 请首先学习使用JavaMail API发送电子邮件的步骤。

为了使用JavaMail API接收或发送电子邮件, 你需要加载两个jar文件：

• mail.jar
• activation.jar

下载这些jar文件

（或）访问Oracle网站以下载最新版本。

用Java接收带有附件的电子邮件的示例

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
import java.io.*;

class ReadAttachment{
  public static void main(String [] args)throws Exception{
   
   String host="mail.srcmini02.com";
   final String user="sonoojaiswal@srcmini02.com";
   final String password="xxxxx";//change accordingly

   Properties properties = System.getProperties();
   properties.setProperty("mail.smtp.host", host );
   properties.put("mail.smtp.auth", "true");

   Session session = Session.getDefaultInstance(properties, new javax.mail.Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
     return new PasswordAuthentication(user, password);
    }
   });
      
     Store store = session.getStore("pop3");
     store.connect(host, user, password);

     Folder folder = store.getFolder("inbox");
     folder.open(Folder.READ_WRITE);

     Message[] message = folder.getMessages();


  for (int a = 0; a < message.length; a++) {
    System.out.println("-------------" + (a + 1) + "-----------");
    System.out.println(message[a].getSentDate());

    Multipart multipart = (Multipart) message[a].getContent();
 
    for (int i = 0; i < multipart.getCount(); i++) {
     BodyPart bodyPart = multipart.getBodyPart(i);
     InputStream stream = bodyPart.getInputStream();
     BufferedReader br = new BufferedReader(new InputStreamReader(stream));

      while (br.ready()) {
       System.out.println(br.readLine());
      }
     System.out.println();
    }
   System.out.println();
  }

  folder.close(true);
  store.close();
  }
}