Java发送邮件的几种方式

布满荆棘的人生 2022-05-17 02:50 150阅读 0赞

最近的一个项目中用到了邮件发送，所以研究了一下。将其总结下来。   
要发送邮件就要用到java中的JavaMail,关于JavaMailAPI的详解呢在   
([http://blog.csdn.net/imain/article/details/1453677][http_blog.csdn.net_imain_article_details_1453677]“)中有非常详尽的介绍，我就直接上代码了。   
1：使用JavaMail发送邮件

// 1.创建一个程序与邮件服务器会话对象 Session
     Properties props = new Properties();
     props.setProperty("mail.transport.protocol", "SMTP");
     props.setProperty("mail.smtp.host", "smtp.163.com");
     props.setProperty("mail.smtp.port", "25");
     // 指定验证为true
     props.setProperty("mail.smtp.auth", "true");
     props.setProperty("mail.smtp.timeout","1000");
     // 验证账号及密码，密码需要是第三方授权码
     Authenticator auth = new Authenticator() {
     public PasswordAuthentication getPasswordAuthentication({
        return new PasswordAuthentication("*******@163.com", "*******");
                }
            };
     Session session = Session.getInstance(props, auth);
    
    // 2.创建一个Message，它相当于是邮件内容
    Message message = new MimeMessage(session);
    // 设置发送者
    message.setFrom(new InternetAddress("*******@163.com"));
    // 设置发送方式与接收者
    message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(email));
    // 设置主题
    message.setSubject("邮件发送测试");
    // 设置内容
    message.setContent(emailMsg, "text/html;charset=utf-8");
    
    // 3.创建 Transport用于将邮件发送
    Transport.send(message);

2：我用的是spring框架,spring 封装了一个简单易用的关于邮件发送的工具类JavaMailSenderImpl ,所以可以用JavaMailSenderImpl 来实现邮件发送。

public class MailService {
        private static final String HOST = "smtp.163.com";
        private static final Integer PORT = 25;
        private static final String USERNAME = "*******@163.com";
        private static final String PASSWORD = "*******";
        private static final String EMAILFORM = "*******@163.com";
        private static JavaMailSenderImpl mailSender = createMailSender();
        /**
         * 邮件发送器
         *
         * @return 配置好的工具
         */
        private static JavaMailSenderImpl createMailSender() {
            JavaMailSenderImpl sender = new JavaMailSenderImpl();
            sender.setHost(HOST);
            sender.setPort(PORT);
            sender.setUsername(USERNAME);
            sender.setPassword(PASSWORD);
            sender.setDefaultEncoding("Utf-8");
            Properties p = new Properties();
            p.setProperty("mail.smtp.timeout", "25000");
            p.setProperty("mail.smtp.auth", "false");
            sender.setJavaMailProperties(p);
            return sender;
        }
    
        /**
         * 发送邮件
         *
         * @param to 接受人
         * @param subject 主题
         * @param html 发送内容
         * @throws MessagingException 异常
         * @throws UnsupportedEncodingException 异常
         */
        public static void sendHtmlMail(String to, String subject, String html) throws MessagingException,UnsupportedEncodingException {
            MimeMessage mimeMessage = mailSender.createMimeMessage();
            // 设置utf-8或GBK编码，否则邮件会有乱码
            MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage, true, "UTF-8");
            messageHelper.setFrom(EMAILFORM, "系统名称");
            messageHelper.setTo(to);
            messageHelper.setSubject(subject);
            messageHelper.setText(html, true);
            mailSender.send(mimeMessage);
        }
    }

当然这种是硬编码的方式了。也可以写在资源文件中。

资源文件

mailConfig.properties
    #服务器
    mailHost=smtp.163.com
    #端口号
    mailPort=25
    #邮箱账号
    mailUsername=*******@163.com
    #邮箱授权码
    mailPassword=*******
    #时间延迟
    mailTimeout=25000
    #发送人
    mailFrom=*******@163.com

获得资源文件内容

public class MailConfig {
        private static final String PROPERTIES_DEFAULT = "mailConfig.properties";
        public static String host;
        public static Integer port;
        public static String userName;
        public static String passWord;
        public static String emailForm;
        public static String timeout;
        public static String personal;
        public static Properties properties;
        static{
            init();
        }
    
        /**
         * 初始化
         */
        private static void init() {
            properties = new Properties();
            try{
                InputStream inputStream = MailConfig.class.getClassLoader().getResourceAsStream(PROPERTIES_DEFAULT);
                properties.load(inputStream);
                inputStream.close();
                host = properties.getProperty("mailHost");
                port = Integer.parseInt(properties.getProperty("mailPort"));
                userName = properties.getProperty("mailUsername");
                passWord = properties.getProperty("mailPassword");
                emailForm = properties.getProperty("mailFrom");
                timeout = properties.getProperty("mailTimeout");
                personal = "墨裔";
            } catch(IOException e){
                e.printStackTrace();
            }
        }
    }

发送邮件

public class MailUtil {
        private static final String HOST = MailConfig.host;
        private static final Integer PORT = MailConfig.port;
        private static final String USERNAME = MailConfig.userName;
        private static final String PASSWORD = MailConfig.passWord;
        private static final String emailForm = MailConfig.emailForm;
        private static final String timeout = MailConfig.timeout;
        private static final String personal = MailConfig.personal;
        private static JavaMailSenderImpl mailSender = createMailSender();
        /**
         * 邮件发送器
         *
         * @return 配置好的工具
         */
        private static JavaMailSenderImpl createMailSender() {
            JavaMailSenderImpl sender = new JavaMailSenderImpl();
            sender.setHost(HOST);
            sender.setPort(PORT);
            sender.setUsername(USERNAME);
            sender.setPassword(PASSWORD);
            sender.setDefaultEncoding("Utf-8");
            Properties p = new Properties();
            p.setProperty("mail.smtp.timeout", timeout);
            p.setProperty("mail.smtp.auth", "false");
            sender.setJavaMailProperties(p);
            return sender;
        }
    
        /**
         * 发送邮件
         *
         * @param to 接受人
         * @param subject 主题
         * @param html 发送内容
         * @throws MessagingException 异常
         * @throws UnsupportedEncodingException 异常
         */
        public static void sendMail(String to, String subject, String html) throws MessagingException,UnsupportedEncodingException {
            MimeMessage mimeMessage = mailSender.createMimeMessage();
            // 设置utf-8或GBK编码，否则邮件会有乱码
            MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage, true, "UTF-8");
            messageHelper.setFrom(emailForm, personal);
            messageHelper.setTo(to);
            messageHelper.setSubject(subject);
            messageHelper.setText(html, true);
            mailSender.send(mimeMessage);
        }
    }

源代码已经上传，可以下载   
[https://github.com/wolf521/demo/tree/master/src/main/java/com/example/demo/mail][https_github.com_wolf521_demo_tree_master_src_main_java_com_example_demo_mail]

jar包下载   
[http://download.csdn.net/download/qq\_32371887/10123280][http_download.csdn.net_download_qq_32371887_10123280]

转：[https://blog.csdn.net/qq\_32371887/article/details/72821291][https_blog.csdn.net_qq_32371887_article_details_72821291]

[http_blog.csdn.net_imain_article_details_1453677]: http://blog.csdn.net/imain/article/details/1453677
[https_github.com_wolf521_demo_tree_master_src_main_java_com_example_demo_mail]: https://github.com/wolf521/demo/tree/master/src/main/java/com/example/demo/mail
[http_download.csdn.net_download_qq_32371887_10123280]: http://download.csdn.net/download/qq_32371887/10123280
[https_blog.csdn.net_qq_32371887_article_details_72821291]: https://blog.csdn.net/qq_32371887/article/details/72821291