Java-收邮件

import java.util.Properties;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;
public class SimpleRecMail {
    public static void main(String[] args) {
        String host = "pop3.163.com";
        String username = "mchotdog_011";
        String password = "mchotdog";
        // Create empty properties
        try{
        Properties props = new Properties();
        // Get session
        Session session = Session.getDefaultInstance(props, null);
        // Get the store
        Store store = session.getStore("pop3");
        store.connect(host, username, password);
        // Get folder
        Folder folder = store.getDefaultFolder();
        if(folder == null) throw new Exception("No default folder");
        folder = folder.getFolder("INBOX");
        if(folder == null) throw new Exception("No POP3 INBOX");
        folder.open(Folder.READ_ONLY);
        // Get directory
        Message message[] = folder.getMessages();
        for (int i = 0, n = message.length; i < n; i++) {
            System.out.println(message[i]);
            System.out.println(i + ": " + message[i].getFrom()
            + "\t" + message[i].getSubject());
        }
        // Close connection
        folder.close(false);
        store.close();
        }catch(Exception ex){
            ex.printStackTrace();
        }
    }
}