java使用smtp发送邮件问题

原先使用smtp通过邮箱发送邮件不需要认证，但是后来发现如果使用的是QQ邮箱会报认证失败的异常。原来QQ邮箱是需要ssl认证的，需要先到QQ邮箱里的 设置--账户--POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服务 开通POP3/SMTP服务获得授权码，在transport.connect的时候传的是这个授权码，并且需要在props里添加几个参数，于是在原来的基础上做了修改加了一个了方法，QQ邮箱也可以发送了.

开通SMTP服务

props添加代码

props.put("mail.smtp.ssl.enable", "true");
props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.setProperty("mail.smtp.socketFactory.port", "465");

java使用smtp发送邮件代码

import java.util.Properties;
import java.util.StringTokenizer;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

public class SendMail {
    String      SMTPServer ;
    String      user ;
    String      password ;
    Properties  props = new Properties();
    Session     sendMailSession;
    Store       store;
    Transport   transport;
    MimeMessage newMessage;
    public SendMail(String SMTPServer,String user,String password){
    this.SMTPServer = SMTPServer;
    this.user       = user;
    this.password   = password;
    try {    
            props.put("mail.smtp.host", SMTPServer);
            props.put("mail.smtp.auth", "true");

            qqMailConf(SMTPServer, props);

            sendMailSession=Session.getInstance(props, null);

            sendMailSession.setDebug(false);
            newMessage = new MimeMessage(sendMailSession); 
        }catch(Exception e) {
    System.err.println(e.getMessage());
}
}

   /**
    * qq邮箱设置
    */
   public void qqMailConf(String SMTPServer, Properties props){
   if(SMTPServer.indexOf("smtp.qq.com")!=-1){
   props.put("mail.smtp.ssl.enable", "true");   
   props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
   props.setProperty("mail.smtp.socketFactory.port", "465");
   }

   }

/**
      * 下面是邮件发送的方法　
      * 参数注释
      * from:   发信人邮箱地址
      * to:     收信人邮箱地址
      * cc:     抄送人  　　　可以为null
      * bcc:    暗送人        可以为null
      * subject:主题
      * content:内容
      */
    public  String send(String from,String to,String cc,String bcc,String subject,String content) {
        try {
        System.out.println("hhhh");
            newMessage.setFrom(new InternetAddress(from, ""));
            newMessage.setSubject(subject);
            newMessage.setSentDate(new java.util.Date());
            StringTokenizer tokenTO     = new StringTokenizer(to, ",");        
            InternetAddress[] addrArrTO = new InternetAddress[tokenTO.countTokens()];
            int i = 0;
            while(tokenTO.hasMoreTokens()) {
                addrArrTO[i] = new InternetAddress(tokenTO.nextToken().toString());
                i++;
            }
            newMessage.saveChanges();

            transport = sendMailSession.getTransport("smtp");
            transport.connect(SMTPServer, user, password);
            if(i>0)
                 newMessage.setRecipients(Message.RecipientType.TO, addrArrTO);
            else   
                if(to!=null) newMessage.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));

            if(cc!=null)  
               newMessage.setRecipients(Message.RecipientType.CC, InternetAddress.parse(cc));
            if(bcc!=null) 
               newMessage.setRecipients(Message.RecipientType.BCC, InternetAddress.parse(bcc));

            newMessage.setText(content);
            transport.sendMessage(newMessage, newMessage.getAllRecipients());

        }
        catch(Exception e) {
        e.printStackTrace();
            return e.toString();//邮件发送失败
        }
        return "OK";           //邮件发送成功
     }   


    public static void main(String[] arg) {
    SendMail sendMail = new SendMail("smtp.qq.com", "*******@qq.com", "..授权码..");
    for (int i = 0; i < 1; i++) {
      String msg = sendMail.send("*******@qq.com","[e-mail]",null,null,"测试subject" + 1,"测试contents");
          System.out.println("Message:"+ i + msg);
    }
    }

}