Java Mail发送邮件

package javamailtest; 
import java.util.Date; 
import java.util.Properties; 
import javax.mail.Folder; 
import javax.mail.Message; 
import javax.mail.Session; 
import javax.mail.Store; 
import javax.mail.Transport; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeMessage; 
/** 
* 邮件的收发器
* @author liudong 
*/ 
public class MailDemo { 
    public static void main(String[] args) { 
//        receive(); 
    	send();
    } 
    /** 
    * 邮件接收
    */ 
    protected static void receive() { 
        try { 
            Properties prop = new Properties(); 
            Session ses = Session.getInstance(prop); 
            // 使用 pop3 Provider ,Store用于接收邮件
            Store store = ses.getStore("pop3");
           
//          store.connect("hostName",userName,password); //hostName为邮件服务器的地址
            store.connect("pop3.sina.com", "[email protected]","xxx"); 
            if (store.isConnected()) { 
                Folder inbox = store.getFolder("INBOX"); //收件箱
                if (inbox.exists()) { 
                    inbox.open(Folder.READ_ONLY);  //打开收件箱
                    int nCount = inbox.getMessageCount(); //获取邮件数量
                    System.out.println("Inbox contains " + nCount + " messages");
                    // 依次显示收件箱中的每封邮件
                    for(int i=1;i<=nCount;i++){ 
                        MimeMessage msg = (MimeMessage) inbox.getMessage(i); 
                        System.out.println("Subject : " + msg.getSubject()); 
                        System.out.println("From : " + msg.getFrom()[0].toString()); 
                        System.out.println("Content type : " + msg.getContentType());
                        System.out.println(msg.getContent()); 
                    } 
                } 
            } 
        } catch (Exception ex) { 
            ex.printStackTrace(); 
        } 
    }
    
    
    /** 
    * 邮件发送
    */ 
    protected static void send() { 
        try { 
            Properties prop = new Properties(); 
            // 邮件发送者地址
            prop.setProperty("mail.sohu.from","[email protected]"); 
            Session ses = Session.getInstance(prop);                           
            // Transport用于邮件发送的，使用smtp 协议
            Transport transport = ses.getTransport("smtp");
            // 连接到 Hotmail 服务器，请替换为自己的用户名和口令
            transport.connect("smtp.sohu.com", "[email protected]","xxx"); 
            // 准备要发送的邮件
            MimeMessage txMsg = new MimeMessage(ses); 
            txMsg.setSubject("This is the subject"); 
            // 邮件发送者地址
            InternetAddress addrFrom = new InternetAddress("[email protected]"); 
            txMsg.setFrom(addrFrom); 
            // 邮件接收者地址
            InternetAddress addrTo = new InternetAddress("[email protected]", "ziji");
            txMsg.addRecipient(Message.RecipientType.TO, addrTo); 
            // 邮件内容
            txMsg.setText("Hello world !testtest"); 
            txMsg.setSentDate(new Date()); 
            // 发送邮件
            transport.sendMessage(txMsg, txMsg.getAllRecipients()); //发送邮件
        } catch (Exception ex) { 
            ex.printStackTrace(); 
        } 
    } 
} 

Transport用于发送邮件，Store用于接收邮件，这两个对象都是通过session来获取的，根据协议的名称来获取不同的provider