java之邮件读取和解析

import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.*;
 
public class EmailReader {
    public static void main(String[] args) {
        String host = "your.imap.host";
        String username = "your-username";
        String password = "your-password";
 
        Properties properties = new Properties();
        properties.put("mail.imap.host", host);
        properties.put("mail.imap.port", "993");
        properties.put("mail.imap.starttls.enable", "true");
 
        Session emailSession = Session.getDefaultInstance(properties);
        try {
            Store store = emailSession.getStore("imap");
            store.connect(host, username, password);
 
            Folder emailFolder = store.getFolder("INBOX");
            emailFolder.open(Folder.READ_ONLY);
 
            Message[] messages = emailFolder.getMessages();
            for (Message message : messages) {
                Address[] fromAddress = message.getFrom();
                String from = fromAddress[0].toString();
                
                String subject = message.getSubject();
                String content = message.getContent().toString();
                
                System.out.println("FROM: " + from);
                System.out.println("SUBJECT: " + subject);
                System.out.println("CONTENT: " + content);
            }
 
            emailFolder.close(false);
            store.close();
        } catch (NoSuchProviderException | MessagingException | IOException e) {
            e.printStackTrace();
        }
    }
}

这段代码演示了如何使用JavaMail API从IMAP服务器读取邮件，并打印出发件人、主题和内容。需要替换your.imap.host, your-username, 和 your-password为实际的邮件服务器地址和凭据。