Java 发送邮件简单实现

电玩女神 2022-05-18 05:29 201阅读 0赞

一、引入POM文件

<dependency>
    	<groupId>javax.mail</groupId>
    	<artifactId>mail</artifactId>
    	<version>1.4.7</version>
    </dependency>

二、Java实现

public class FirstMail {
    	public static void main(String[] args) throws AddressException, MessagingException {
    		Long start = System.currentTimeMillis();
    		
    		// 设置属性
    		Properties props = new Properties();
            props.setProperty("mail.smtp.auth", "true");
            props.setProperty("mail.transport.protocol", "smtp");
            // 用SMTP协议发送Email时通常要设置mail.smtp.host(mail.protocol.host协议特定邮件服务器名)属性
            props.put("mail.smtp.host","smtp.163.com");// smtp服务器地址
            
            // javax.mail.Session保存邮件系统的配置属性和提供用户验证的信息，发送email首先要获取session对象
            // 		Session.getInstance(java.util.Properties)获取非共享的session对象
            // 		Session.getDefaultInstance(java.utilProperties)获取共享的session对象
            Session session = Session.getInstance(props);
            session.setDebug(true);
            
            // 配置邮件会话之后，要编写消息
            // 		要编写消息就要生成javax.mail.Message子类的实例
            //		或对Internet邮件使用javax.mail.interet.MimeMessage类
            Message msg = new MimeMessage(session);
            
            // 消息发送者、日期、主题 
            msg.setSubject("第一封测试邮件");
            msg.setText("你好!这是一封测试邮件");
            msg.setSentDate(new Date());
            
            // 设置消息的接受者与发送者（寻址接收）
            msg.setFrom(new InternetAddress("xuli1005@163.com"));//发件人邮箱(我的163邮箱)
            msg.setRecipient(Message.RecipientType.TO,
                    new InternetAddress("1176922337@qq.com")); //收件人邮箱(我的QQ邮箱)
            msg.saveChanges();
    
            // 发送Email,这里以文本消息为例 javax.mail.Transport类来发送消息。
            //		这时Transport对象与相应传输协议通信，这里是SMTP协议
            Transport transport = session.getTransport();
            
            // 登录邮箱 。配置发件人邮箱,密码或授权码
            transport.connect("xuli1005@163.com","xxxxxx");
            //发送邮件
            transport.sendMessage(msg, msg.getAllRecipients());
            
            System.out.println("邮件发送成功...");
            transport.close();
            System.out.println("发送一封邮件耗时："+(System.currentTimeMillis()-start)+"ms");
    	}
    }

三、日志输出

DEBUG: setDebug: JavaMail version 1.4.7
    DEBUG: getProvider() returning 
    javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
    DEBUG SMTP: useEhlo true, useAuth true
    DEBUG SMTP: trying to connect to host "smtp.163.com", port 25, isSSL false
    220 163.com Anti-spam GT for Coremail System (163com[20141201])
    DEBUG SMTP: connected to host "smtp.163.com", port: 25
    
    EHLO ZV7PFJKWMI36W1H
    250-mail
    250-PIPELINING
    250-AUTH LOGIN PLAIN
    250-AUTH=LOGIN PLAIN
    250-coremail 
    1Uxr2xKj7kG0xkI17xGrU7I0s8FY2U3Uj8Cz28x1UUUUU7Ic2I0Y2UrwCj_RUCa0xDrUUUUj
    250-STARTTLS
    250 8BITMIME
    DEBUG SMTP: Found extension "PIPELINING", arg ""
    DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
    DEBUG SMTP: Found extension "AUTH=LOGIN", arg "PLAIN"
    DEBUG SMTP: Found extension "coremail", arg 
    "1Uxr2xKj7kG0xkI17xGrU7I0s8FY2U3Uj8Cz28x1UUUUU7Ic2I0Y2UrwCj_RUCa0xDrUUUUj"
    DEBUG SMTP: Found extension "STARTTLS", arg ""
    DEBUG SMTP: Found extension "8BITMIME", arg ""
    DEBUG SMTP: Attempt to authenticate using mechanisms: LOGIN PLAIN DIGEST-MD5 NTLM 
    DEBUG SMTP: AUTH LOGIN command trace suppressed
    DEBUG SMTP: AUTH LOGIN succeeded
    DEBUG SMTP: use8bit false
    MAIL FROM:<xuli1005@163.com>
    250 Mail OK
    RCPT TO:<1176922337@qq.com>
    250 Mail OK
    DEBUG SMTP: Verified Addresses
    DEBUG SMTP:   1176922337@qq.com
    DATA
    354 End data with <CR><LF>.<CR><LF>
    Date: Mon, 30 Jul 2018 17:32:18 +0800 (CST)
    From: xuli1005@163.com
    To: 1176922337@qq.com
    Message-ID: <317574433.0.1532943138175.JavaMail.Administrator@ZV7PFJKWMI36W1H>
    Subject: =?UTF-8?B?56ys5LiA5bCB5rWL6K+V6YKu5Lu2?=
    MIME-Version: 1.0
    Content-Type: text/plain; charset=UTF-8
    Content-Transfer-Encoding: base64
    
    5L2g5aW9Iei/meaYr+S4gOWwgea1i+ivlemCruS7tg==
    .
    250 Mail OK queued as smtp7,C8CowAB3qzUi215bTjm6LQ--.18449S2 1532943148
    邮件发送成功...
    QUIT
    221 Bye
    发送一封邮件耗时：9685ms

四、总结

java的邮件分发还有其他类型，这里是最简单的文本类型，但是原理都差不多。可以看到这里发送一次邮件的时间还是比较长的，我们真正在项目中的实现肯定是要使用多线程的方式。