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);    }    }    }