java通过SMTP发送QQ邮件的完全步骤

╰半橙微兮° 2022-07-12 02:26 125阅读 0赞

阿里云 ECS smtp.exmail.qq.com 25 端口不通  
所以下面设置的25端口是不行的，替换成465端口并修改协议为ssl即可  
阿里云的参考这篇博客

http://blog.csdn.net/u013412790/article/details/72904038

import org.apache.logging.log4j.LogManager;
    import org.apache.logging.log4j.Logger;
    
    import java.util.Calendar;
    import java.util.Properties;
    
    import javax.mail.MessagingException;
    import javax.mail.Session;
    import javax.mail.Transport;
    import javax.mail.Message.RecipientType;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeMessage;
    
    /** * @version V1.0 * @Description: 发送邮件的工具类 * @Modified By:Ming Created in 16:51 2017/2/6 */
    public class SendEmail { 
    
        private static final Logger logger = LogManager.getLogger(SendEmail.class);
    
        private final static String smtpHost = "smtp.qq.com";//配置Email session对象
        private final static String messageType = "text/html;charset=UTF-8";//相应内容类型，编码类型
        private final static String subject = "iYo (社联网) 密码修改";//主题
        private final static String fromEmail = "272194539@qq.com";//发送邮件的邮箱
        private final static String password = "xxxxxxxxxxxxxxxx";//密码(口令)
    
        @SuppressWarnings("static-access")
        public boolean sendMessage(String to, int id) {
            try {
                String messageText = appendString(id);
                //第一步：配置javax.mail.Session对象
                Properties props = new Properties();   // 创建Properties 类用于记录邮箱的一些属性
                props.put("mail.smtp.host", smtpHost);  //此处填写SMTP服务器
                props.put("mail.smtp.starttls.enable", "true");//使用 STARTTLS安全连接
                props.put("mail.smtp.port", "25");             //google使用465或587端口
                props.put("mail.smtp.auth", "true");       // 表示SMTP发送邮件，必须进行身份验证
                props.put("mail.debug", "true");
                Session mailSession = Session.getInstance(props, new MyAuthenticator(fromEmail, password));//此处填写你的账号和口令(16位口令)
    
                //第二步：编写消息
                InternetAddress fromAddress = new InternetAddress(fromEmail);// 设置发件人的邮箱
                InternetAddress toAddress = new InternetAddress(to); // 设置收件人的邮箱
                MimeMessage message = new MimeMessage(mailSession);
                message.setFrom(fromAddress);
                message.addRecipient(RecipientType.TO, toAddress);
                message.setSentDate(Calendar.getInstance().getTime());
                message.setSubject(subject);   // 设置邮件标题
                message.setContent(messageText, messageType);// 设置邮件的内容体
    
                // 第三步：发送消息
                Transport transport = mailSession.getTransport("smtp");
                transport.connect(smtpHost, fromEmail, password);
                transport.send(message, message.getRecipients(RecipientType.TO)); // 发送邮件啦
    
                return true;
            } catch (MessagingException e) {
                e.printStackTrace();
                logger.error("邮件发送错误" + e.getMessage());
                return false;
            } catch (Exception e) {
                logger.error("邮件发送错误" + e.getMessage());
                return false;
            }
        }
    
        /** * @Author: Ming * @param: id 用户id * @Description: 添加发送的短信的信息 * @Date: 17:12 2017/2/6 */
        public static String appendString(int id) {
            int i;
            String t = "&nbsp";
            String messageText = "";
    
            for (i = 0; i < 4; i++) messageText += t;
            messageText += "xxxxxxxxx~<br/>";
    
            for (i = 0; i < 12; i++) messageText += t;
            messageText += "没关系，xxxxxxxxx<br/>";
    
            for (i = 0; i < 20; i++) messageText += t;
            messageText += "工作室地点：xxxxxxxxx~<br/><br/>";
    
            for (i = 0; i < 28; i++) messageText += t;
            messageText += "请点击：http://xxxxxxxxx";
            return messageText;
        }
    
    }

import javax.mail.Authenticator;
    import javax.mail.PasswordAuthentication;
    
    /** * @version V1.0 * @Description: 构建授权信息，用于进行SMTP进行身份验证 * @Modified By:Ming Created in 10:22 2017/2/7 */
    class MyAuthenticator extends Authenticator { 
        private String userName="";
        private String password="";
    
        public MyAuthenticator(String userName,String password){
            this.userName=userName;
            this.password=password;
        }
        protected PasswordAuthentication getPasswordAuthentication(){
            return new PasswordAuthentication(userName, password);
        }
    }

注意：

如果出现这个错误:javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure 
    
    这个是jdk导致的，jdk里面有一个jce的包，安全性机制导致的访问https会报错，官网上有替代的jar包，换掉就好了
    
    目录 %JAVA_HOME%\jre\lib\security里的local_policy.jar,US_export_policy.jar
    
    JDK7 http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html
    
    JDK8 http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html

借鉴：

http://www.cnblogs.com/1995hxt/p/6185399.html

至此，邮件就应该能成功发出去啦。  
本文是日常开发的随手记录，如有问题，请博内留言以帮助我改正和完善，一起努力，一起学习，一起进步！如果觉得有帮助，记得赞一个哟。