java 收邮件 使用 mail包

import java.util.Properties;
import javax.mail.FetchProfile;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.internet.InternetAddress;

public class ReceiveMail
{
public ReceiveMail(){}

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

public static void receive()
{
try
{
Properties props = new Properties();
Session s = Session.getInstance(props);
Store store = s.getStore("pop3");

//对应改成自己的用户名和密码
store.connect("pop.sina.com", "userName", "******");

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

FetchProfile profile = new FetchProfile();
profile.add(FetchProfile.Item.ENVELOPE);
Message arraymessage[] = folder.getMessages();
folder.fetch(arraymessage, profile);

System.out.println("收件箱的邮件数：" + arraymessage.length);
for (int i = 0; i < arraymessage.length; i++)
{
//邮件发送者
String from = arraymessage[i].getfrom()[0].toString();
InternetAddress ia = new InternetAddress(from);

System.out.println("******" + i + "******");

System.out.println("from:" + ia.getPersonal() + '(' + ia.getAddress() + ')');

//邮件标题
System.out.println("Title:" + arraymessage[i].getSubject());

//邮件大小
System.out.println("Size:" + arraymessage[i].getSize(