1.pom.xml 依赖

    1. <!-- mail -->
    2. <dependency>
    3.     <groupId>org.springframework.boot</groupId>
    4.     <artifactId>spring-boot-starter-mail</artifactId>
    5. </dependency>

    2.配置属性

    1. # mail
    2. spring.mail.host:smtp.exmail.qq.com
    3. spring.mail.username:fengyw@roncoo.com,service@roncoo.com,education@roncoo.com
    4. spring.mail.password:123
    5. spring.mail.properties.mail.smtp.auth:true

    3.配置类

    实现多账号轮询发送邮件

    1. /**
    2.  * 实现多账号，轮询发送
    3.  */
    4. @Configuration
    5. @EnableConfigurationProperties(MailProperties.class)
    6. public class RoncooJavaMailSenderImpl extends JavaMailSenderImpl implements JavaMailSender {
    7.     private ArrayList<String> usernameList;
    8.     private ArrayList<String> passwordList;
    9.     private int currentMailId = 0;
    10.     private final MailProperties properties;
    11.     public RoncooJavaMailSenderImpl(MailProperties properties) {
    12.         this.properties = properties;
    13.         // 初始化账号
    14.         if (usernameList == null)
    15.             usernameList = new ArrayList<String>();
    16.         String[] userNames = this.properties.getUsername().split(",");
    17.         if (userNames != null) {
    18.             for (String user : userNames) {
    19.                 usernameList.add(user);
    20.             }
    21.         }
    22.         // 初始化密码
    23.         if (passwordList == null)
    24.             passwordList = new ArrayList<String>();
    25.         String[] passwords = this.properties.getPassword().split(",");
    26.         if (passwords != null) {
    27.             for (String pw : passwords) {
    28.                 passwordList.add(pw);
    29.             }
    30.         }
    31.     }
    32.     @Override
    33.     protected void doSend(MimeMessage[] mimeMessage, Object[] object) throws MailException {
    34.         super.setUsername(usernameList.get(currentMailId));
    35.         super.setPassword(passwordList.get(currentMailId));
    36.         // 设置编码和各种参数
    37.         super.setHost(this.properties.getHost());
    38.         super.setDefaultEncoding(this.properties.getDefaultEncoding().name());
    39.         super.setJavaMailProperties(asProperties(this.properties.getProperties()));
    40.         super.doSend(mimeMessage, object);
    41.         // 轮询
    42.         currentMailId = (currentMailId + 1) % usernameList.size();
    43.     }
    44.     private Properties asProperties(Map<String, String> source) {
    45.         Properties properties = new Properties();
    46.         properties.putAll(source);
    47.         return properties;
    48.     }
    49.     @Override
    50.     public String getUsername() {
    51.         return usernameList.get(currentMailId);
    52.     }
    53. }

    4.发送邮件类

    1. /**
    2.  * 实现发送功能
    3.  */
    4. @Component
    5. public class RoncooJavaMailComponent {
    6.     private static final String template = "mail/roncoo.ftl";
    7.     @Autowired
    8.     private FreeMarkerConfigurer freeMarkerConfigurer;
    9.     @Autowired
    10.     private RoncooJavaMailSenderImpl javaMailSender;
    11.     public void sendMail(String email) {
    12.         Map<String, Object> map = new HashMap<String, Object>();
    13.         map.put("email", email);
    14.         try {
    15.             String text = getTextByTemplate(template, map);
    16.             send(email, text);
    17.         } catch (IOException | TemplateException e) {
    18.             e.printStackTrace();
    19.         } catch (MessagingException e) {
    20.             e.printStackTrace();
    21.         }
    22.     }
    23.     private String getTextByTemplate(String template, Map<String, Object> model) throws TemplateNotFoundException,
    24.         MalformedTemplateNameException, ParseException, IOException, TemplateException {
    25.         return FreeMarkerTemplateUtils
    26.             .processTemplateIntoString(freeMarkerConfigurer.getConfiguration().getTemplate(template), model);
    27.     }
    28.     private String send(String email, String text) throws MessagingException, UnsupportedEncodingException {
    29.         MimeMessage message = javaMailSender.createMimeMessage();
    30.         MimeMessageHelper helper = new MimeMessageHelper(message, true, "UTF-8");
    31.         InternetAddress from = new InternetAddress();
    32.         from.setAddress(javaMailSender.getUsername());
    33.         from.setPersonal("龙果学院", "UTF-8");
    34.         helper.setFrom(from);
    35.         helper.setTo(email);
    36.         helper.setSubject("测试邮件");
    37.         helper.setText(text, true);
    38.         javaMailSender.send(message);
    39.         return text;
    40.     }
    41. }

    5.FreeMarker 模板

    1. <!DOCTYPE html>
    2. <html lang="en">
    3.     <head>
    4.         <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    5.     </head>
    6.     <body>
    7.         <div style="width: 600px; text-align: left; margin: 0 auto;">
    8.             <h1 style="color: #005da7;">龙果学院</h1>
    9.             <div style="border-bottom: 5px solid #005da7; height: 2px; width: 100%;"></div>
    10.             <div style="border: 1px solid #005da7; font-size: 16px; line-height: 50px; padding: 20px;">
    11.                 <div>${email}，您好！</div>
    12.                 <div>
    13.                     这是个测试
    14.                 </div>
    15.                 <div style="border-bottom: 2px solid #005da7; height: 2px; width: 100%;"></div>
    16.                 <div>扫一扫，关注龙果学院微信公共号，里面更多精彩推荐</div>
    17.                 <div>
    18.                     <img src="http://account.roncoo.com/images/qrcode.png" alt="龙果学院公众号二维码" />
    19.                 </div>
    20.                 <div>
    21.                     想了解更多信息，请访问
    22.                     <a href="http://www.roncoo.com">http://www.roncoo.com</a>
    23.                 </div>
    24.             </div>
    25.         </div>
    26.     </body>
    27. </html>