文章内容
Spring中提供了JavaMailSender接口实现邮件发送功能，在SpringBoot2.X中也封装了发送邮件相关的Starter，并且提供了自动化配置。
一、添加对应的Starter
pom.xml中添加下面依赖：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
二、添加发送邮件相关的配置
application.properties中添加邮件配置：
spring.mail.host = smtp.163.com
spring.mail.port = 465
spring.mail.username = xxx@163.com
spring.mail.password = xxx
spring.mail.properties.mail.smtp.auth = true
spring.mail.properties.mail.smtp.timeout = 25000
spring.mail.properties.mail.smtp.socketFactory.class = javax.net.ssl.SSLSocketFactory
spring.mail.properties.mail.smtp.starttls.enable = true
spring.mail.properties.mail.smtp.starttls.required = true
三、实现发送邮件功能
本例中封装了一个MailServiceImpl，里面注入javaMailSender即可，具体代码如下：
1、MailServiceImpl.java部分代码
/**
* 发送邮件
*/ public void sendMail(Email email) {
long start = System.currentTimeMillis();
try {
MimeMessage mimeMessage = javaMailSender.createMimeMessage();
//true表示需要创建一个multipart message
MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true, "UTF-8");
helper.setFrom(mailUserName);
helper.setTo(email.getToAddress().toArray(new String[email.getToAddress().size()]));
helper.setSubject(email.getSubject());
helper.setText(email.getContent(), true);
if (null != email.getAttachments() && email.getAttachments().size() > 0) {
for (File curFile : email.getAttachments()) {
FileSystemResource file = new FileSystemResource(curFile);
helper.addAttachment(MimeUtility.encodeWord(file.getFilename(), "utf-8", "B"), file);
}
}
log.info("邮件开始发送");
javaMailSender.send(mimeMessage);
long sendMillTimes = System.currentTimeMillis() - start;
log.info("邮件发送成功,sendTimes=" + sendMillTimes);
} catch (Exception e) {
log.error("发送html邮件时发生异常！", e);
}
}
2、MailController.java部分代码
@RequestMapping(value = "/sendMail")
public String sendEmail() {
Email email_email = new Email();
List<String> addressList = new ArrayList<String>();
addressList.add("xxx@qq.com");
email_email.setToAddress(addressList);
email_email.setSubject("java-主题测试");// 主题
email_email.setContent("你好！<br><br> 测试邮件发送成功！");
// 发送邮件
mailService.sendMail(email_email);
return "ok";
}
3、运行效果
项目启动成功后访问http://localhost:8080/sendMail即可成功发送邮件，收到邮件截图如下：
四、实现过程中遇到的问题
1、中文附件乱码问题
java mail发邮件是附件名过长默认会被截断显示乱码，在程序启动时设置主动设置为false可正常显示，具体设置代码如下：
public static void main(String[] args) {
//java mail发邮件时附件名过长默认会被截断，附件名显示【tcmime.29121.29517.50430.bin】，主动设为false可正常显示附件名
System.setProperty("mail.mime.splitlongparameters", "false");
SpringApplication.run(SendMailApplication.class, args);
}
2、无法注入JavaMailSender问题
在application.properties中配置spring.mail.host即可。