javamail发送邮件

import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

public class sendEmail {
    
    static int port = 587;
     
    static String server = "smtp.qq.com";//邮件服务器mail.cpip.net.cn
 
    static String from = "**";//发送者,显示的发件人名字
 
    static String user = "**";//发送者邮箱地址
 
    static String password = "**";//密码
    
    public static void main(String[] args) throws MessagingException, UnsupportedEncodingException {
        
        System.out.println("ceshi");
        
        sendEmail("***","哈哈哈哈","哈哈哈");//收件人
        System.out.println("ok");
    }
    
    public static void sendEmail(String email, String subject, String body) throws UnsupportedEncodingException {
        try {
            Properties props = new Properties();
            props.put("mail.smtp.host",server);
            props.put("mail.smtp.port",port);
            props.put("mail.smtp.auth","true"); 
            Transport transport = null;
            Session session = Session.getDefaultInstance(props, null);
            transport = session.getTransport("smtp");
            transport.connect(server, user, password);
            MimeMessage msg = new MimeMessage(session);
            msg.setSentDate(new Date());
            InternetAddress fromAddress = new InternetAddress(user,from,"UTF-8");
            msg.setFrom(fromAddress);
            InternetAddress[] toAddress = new InternetAddress[1];
            toAddress[0] = new InternetAddress(email);
            msg.setRecipients(Message.RecipientType.TO, toAddress);
            msg.setSubject(subject, "UTF-8");   
            msg.setText(body, "UTF-8");
            msg.saveChanges();
            transport.sendMessage(msg, msg.getAllRecipients());
            transport.close();
        } catch (NoSuchProviderException e) {
            e.printStackTrace();
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}