邮件发送

概述

以QQ邮箱示例

<!-- https://mvnrepository.com/artifact/javax.mail/javax.mail-api -->
<dependency>
    <groupId>javax.mail</groupId>
    <artifactId>javax.mail-api</artifactId>
    <version>1.6.2</version>
</dependency>

<!-- https://mvnrepository.com/artifact/javax.mail/mail -->
<dependency>
  <groupId>javax.mail</groupId>
  <artifactId>mail</artifactId>
  <version>1.4.7</version>
</dependency>

• 发送协议SMTP
• 接收协议POP3

发送文本邮件

@Test
public void testMail() throws Exception {
    Properties prop = new Properties();
    prop.setProperty("mail.host", "smtp.qq.com"); // 邮件服务器
    prop.setProperty("mail.transport.protocol", "smtp"); // 邮件协议
    prop.setProperty("mail.smtp.auth", "true"); // 是否验证用户名密码

    // SSL加密
    MailSSLSocketFactory sf = new MailSSLSocketFactory();
    sf.setTrustAllHosts(true);
    prop.setProperty("mail.smtp.ssl.enable", "true");
    prop.put("mail.smtp.ssl.socketFactory", sf);

    // 1.创建应用程序环境信息session对象
    Session session = Session.getDefaultInstance(prop, new Authenticator() {
        @Override
        protected PasswordAuthentication getPasswordAuthentication() {
            // qq邮箱用户名，授权码
            return new PasswordAuthentication("xxx@qq.com", "mhcxadh");
        }
    });
    session.setDebug(true); // 开启debug模式

    // 2.通过session得到transport对象
    Transport ts = session.getTransport();

    // 3.使用邮箱的用户名和授权码连上邮箱服务器
    ts.connect("smtp.qq.com", "xxx@qq.com", "mcadh");

    // 4.创建邮件
    // 4.1 创建邮件对象
    MimeMessage message = new MimeMessage(session);
    // 4.2 指定发件人
    message.setFrom(new InternetAddress("xxx@qq.com"));
    // 4.3 指明发件人
    message.setRecipient(Message.RecipientType.TO, new InternetAddress("xxx@icloud.com"));
    // 4.4 邮件的标题
    message.setSubject("邮件标题测试");
    // 4.5 邮件正文
    message.setContent("你好", "text/html;charset=utf-8");

    // 5.发送邮件
    ts.sendMessage(message, message.getAllRecipients());

    // 6.关闭连接
    ts.close();
}

正文嵌入图片

@Test
public void testMail() throws Exception {
    Properties prop = new Properties();
    prop.setProperty("mail.host", "smtp.qq.com"); // 邮件服务器
    prop.setProperty("mail.transport.protocol", "smtp"); // 邮件协议
    prop.setProperty("mail.smtp.auth", "true"); // 是否验证用户名密码

    // SSL加密
    MailSSLSocketFactory sf = new MailSSLSocketFactory();
    sf.setTrustAllHosts(true);
    prop.setProperty("mail.smtp.ssl.enable", "true");
    prop.put("mail.smtp.ssl.socketFactory", sf);

    // 1.创建应用程序环境信息session对象
    Session session = Session.getDefaultInstance(prop, new Authenticator() {
        @Override
        protected PasswordAuthentication getPasswordAuthentication() {
            // qq邮箱用户名，授权码
            return new PasswordAuthentication("xxxxx@qq.com", "mdh");
        }
    });
    session.setDebug(true);

    // 2.通过session得到transport对象
    Transport ts = session.getTransport();

    // 3.使用邮箱的用户名和授权码连上邮箱服务器
    ts.connect("smtp.qq.com", "xxxxx@qq.com", "mhdh");

    // 4.创建邮件
    // 4.1 创建邮件对象
    MimeMessage message = new MimeMessage(session);
    // 4.2 指定发件人
    message.setFrom(new InternetAddress("xxxxx@qq.com"));
    // 4.3 指明发件人
    message.setRecipient(Message.RecipientType.TO, new InternetAddress("xxxxx@icloud.com"));
    // 4.4 邮件的标题
    message.setSubject("邮件标题测试");

    // ========================================================
    // 准备图片数据
    // target/Servlet/WEB-INF/classes/动漫头像.jpg
    MimeBodyPart image = new MimeBodyPart();
    DataHandler dh = new DataHandler(new FileDataSource("/Users/collin/IdeaProjects/Kuang/JavaWeb02-muti-maven/Servlet/target/Servlet/WEB-INF/classes/动漫头像.jpg"));
    image.setDataHandler(dh);
    image.setContentID("dm.jpg");

    // 准备邮件正文
    MimeBodyPart text = new MimeBodyPart();
    text.setContent("带图片邮件<img src='cid:dm.jpg'>", "text/html;charset=utf-8");

    // 描述数据关系
    MimeMultipart mm = new MimeMultipart();
    mm.addBodyPart(text);
    mm.addBodyPart(image);
    mm.setSubType("related");

    // 保存到消息中
    message.setContent(mm);
    message.saveChanges();
    // ========================================================
    
    // 5.发送邮件
    ts.sendMessage(message, message.getAllRecipients());

    // 6.关闭连接
    ts.close();
}

附件

@Test
public void testMail() throws Exception {
    Properties prop = new Properties();
    prop.setProperty("mail.host", "smtp.qq.com"); // 邮件服务器
    prop.setProperty("mail.transport.protocol", "smtp"); // 邮件协议
    prop.setProperty("mail.smtp.auth", "true"); // 是否验证用户名密码

    // SSL加密
    MailSSLSocketFactory sf = new MailSSLSocketFactory();
    sf.setTrustAllHosts(true);
    prop.setProperty("mail.smtp.ssl.enable", "true");
    prop.put("mail.smtp.ssl.socketFactory", sf);

    // 1.创建应用程序环境信息session对象
    Session session = Session.getDefaultInstance(prop, new Authenticator() {
        @Override
        protected PasswordAuthentication getPasswordAuthentication() {
            // qq邮箱用户名，授权码
            return new PasswordAuthentication("xxxxx@qq.com", "mhdh");
        }
    });
    session.setDebug(true);

    // 2.通过session得到transport对象
    Transport ts = session.getTransport();

    // 3.使用邮箱的用户名和授权码连上邮箱服务器
    ts.connect("smtp.qq.com", "xxxxx@qq.com", "mhcadh");

    // 4.创建邮件
    // 4.1 创建邮件对象
    MimeMessage message = new MimeMessage(session);
    // 4.2 指定发件人
    message.setFrom(new InternetAddress("xxxxx@qq.com"));
    // 4.3 指明发件人
    message.setRecipient(Message.RecipientType.TO, new InternetAddress("xxxxx@icloud.com"));
    // 4.4 邮件的标题
    message.setSubject("邮件标题测试");

    // ========================================================
    // 准备图片数据
    // target/Servlet/WEB-INF/classes/动漫头像.jpg
    MimeBodyPart image = new MimeBodyPart();
    DataHandler dh = new DataHandler(new FileDataSource("/Users/collin/IdeaProjects/Kuang/JavaWeb02-muti-maven/Servlet/target/Servlet/WEB-INF/classes/动漫头像.jpg"));
    image.setDataHandler(dh);
    image.setContentID("dm.jpg");

    // 准备邮件正文
    MimeBodyPart text = new MimeBodyPart();
    text.setContent("带图片邮件<img src='cid:dm.jpg'>", "text/html;charset=utf-8");

    // 准备附件1
    MimeBodyPart attachFile1 = new MimeBodyPart();
    attachFile1.setDataHandler(new DataHandler(new FileDataSource("/Users/collin/IdeaProjects/Kuang/JavaWeb02-muti-maven/Servlet/target/Servlet/WEB-INF/classes/动漫头像.jpg")));
    attachFile1.setFileName("图片1.jpg");
    // 准备附件2
    MimeBodyPart attachFile2 = new MimeBodyPart();
    attachFile2.setDataHandler(new DataHandler(new FileDataSource("/Users/collin/IdeaProjects/Kuang/JavaWeb02-muti-maven/Servlet/target/Servlet/WEB-INF/classes/动漫头像.jpg")));
    attachFile2.setFileName("图片2.jpg");

    // 拼接正文数据关系
    MimeMultipart mm = new MimeMultipart();
    mm.addBodyPart(text);
    mm.addBodyPart(image);
    mm.setSubType("related");

    MimeBodyPart contextText = new MimeBodyPart();
    contextText.setContent(mm);

    // 拼接附件
    MimeMultipart allFile = new MimeMultipart();
    allFile.addBodyPart(attachFile1);
    allFile.addBodyPart(attachFile2);
    allFile.addBodyPart(contextText);
    allFile.setSubType("mixed");

    // 保存到消息中
    message.setContent(allFile);
    message.saveChanges();
    // ========================================================

    // 5.发送邮件
    ts.sendMessage(message, message.getAllRecipients());

    // 6.关闭连接
    ts.close();
}