使用的技术:
Spring Boot 2.3.2 Java Mail 1.6.2 Maven 3 Java 8 1、添加依赖 1 spring-boot-starter-mail 1 2 3 4 5 <!-- send email --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> </dependency> 2、配置 application.properties 这里得注意下了,除了邮件服务商说明同时支持tls或者ssl,否则需要将tls/ssl分开配置
,这里我使用得是outlook,所以只支持 tls 587端口,一开始我配置成ssl,走了一个坑。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 spring.mail.host=smtp.gmail.com spring.mail.port=587 spring.mail.username=username spring.mail.password=password # Other properties spring.mail.properties.mail.smtp.auth=true spring.mail.properties.mail.smtp.connectiontimeout=5000 spring.mail.properties.mail.smtp.timeout=5000 spring.mail.properties.mail.smtp.writetimeout=5000 # 这里是tls的配置项,如果没有使用587,则要注释掉 # TLS , port 587 spring.mail.properties.mail.smtp.starttls.enable=true # 这里是ssl的配置项,如果没有使用465,则要注释掉 # SSL, post 465 #spring.mail.properties.mail.smtp.socketFactory.port = 465 #spring.mail.properties.mail.smtp.socketFactory.class = javax.net.ssl.SSLSocketFactory 1 2 3 4 5 6 7 8 如果是这个错误,那么就是你把tls/ssl的配置弄反了。 nested exception is: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?. Failed messages: javax.mail.MessagingException: Could not connect to SMTP host: smtp.office365.com, port: 587; nested exception is: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?; message exceptions (1) are: Failed message 1: javax.mail.MessagingException: Could not connect to SMTP host: smtp.office365.com, port: 587; nested exception is: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?] with root cause 3、发送文本邮件 1 2 3 4 5 6 7 8 9 10 11 import org.springframework.mail.SimpleMailMessage; import org.springframework.mail.javamail.JavaMailSender; @Autowired private JavaMailSender javaMailSender; void sendEmail() { SimpleMailMessage msg = new SimpleMailMessage(); msg.setTo("to_1@gmail.com", "to_2@gmail.com", "to_3@yahoo.com"); msg.setSubject("Testing from Spring Boot"); msg.setText("Hello World \n Spring Boot Email"); javaMailSender.send(msg); } 4、发送html格式的邮件 1 2 3 4 5 6 7 8 9 10 @GetMapping("sendMail") void sendMain() throws MessagingException { MimeMessage mimeMessage = mailSender.createMimeMessage(); MimeMessageHelper message = new MimeMessageHelper(mimeMessage, true); message.setFrom("浅忆博客(系统)<server@curlc.com>"); message.setTo("xxxxx@qq.com"); message.setSubject("HTML邮件"); message.setText("<h1>Check attachment for image!</h1>", true); mailSender.send(mimeMessage); } 5、发送HTML电子邮件和文件附件 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 import org.springframework.core.io.ClassPathResource; import org.springframework.mail.javamail.JavaMailSender; import org.springframework.mail.javamail.MimeMessageHelper; import javax.mail.MessagingException; import javax.mail.internet.MimeMessage; void sendEmailWithAttachment() throws MessagingException, IOException { MimeMessage msg = javaMailSender.createMimeMessage(); // true = multipart message MimeMessageHelper helper = new MimeMessageHelper(msg, true); helper.setTo("to_@email"); helper.setSubject("Testing from Spring Boot"); // default = text/plain //helper.setText("Check attachment for image!"); // true = text/html helper.setText("<h1>Check attachment for image!</h1>", true); // hard coded a file path //FileSystemResource file = new FileSystemResource(new File("path/android.png")); helper.addAttachment("my_photo.png", new ClassPathResource("android.png")); javaMailSender.send(msg); } ...