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(实用干货) | Spring Boot集成发送邮件Mail完整示例代码

智云科技发布于 2023年9月8日评论关闭阅读(61)

工作中经常会遇到发邮件的功能，如邮件预警，注册时发一个邮件确认等，这里给出在Spring Boot中发送邮件的完整集成示例

邮件发送支持的内容类型如下：

  1. 发送简单邮件。
  2. 发送html格式的邮件
  3. 发送带附件简单邮件
  4. 发送模板邮件

1. pom.xml

发送模板邮件需要用到spring-boot-starter-thymeleaf，其他其他邮件内容不需要该依赖 

 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

2. application.properties 

 spring.mail.host=smtp.163.com
spring.mail.username=xxx@163.com
# 注意这里的密码不是邮箱的登录密码
spring.mail.password=邮箱客户端授权码
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

注意：如果密码不对在发送邮件中会报异常javax.mail.AuthenticationFailedException: 535 Error, 如果设置了也开启了还是不行再重新设置一下

3. MailUtil 

 import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.MailException;
import org.springframework.mail.SimpleMail message ;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;
@Component
public class MailUtil {
 private final Logger logger = LoggerFactory.getLogger(getClass());
 @Autowired
 JavaMailSender mailSender;
 @Autowired
 TemplateEngine templateEngine;
 /**
 * 发送简单邮件
 * @param from 发送人
 * @param to 接收人
 * @param carbonCopy 抄送人
 * @param subject 主题
 * @param content 内容
 */ public void sendSimpleEmail(String from, String[] to, String[] carbonCopy, String  subject , String content) {
 long startTimestamp = System.currentTimeMillis();
 logger.info("Start send mail ... ");
 try {
 SimpleMailMessage message = new SimpleMailMessage();
 message.setFrom(from);
 message.setTo(to);
 message.setCc(carbonCopy);
 message.setSubject(subject);
 message.setText(content);
 mailSender.send(message);
 logger.info("Send mail success, cost {} million seconds", System.currentTimeMillis() - startTimestamp);
 } catch (MailException e) {
 logger.error("Send mail failed, error message is : {} n", e. getMessage ());
 }
 }
 /**
 * 发送html邮件
 */ public void sendHtmlEmail(String  deliver , String[] receiver, String[] carbonCopy, String subject, String content, boolean isHtml) {
 long startTimestamp = System.currentTimeMillis();
 logger.info("Start send email ...");
 try {
 MimeMessage message = mailSender.createMimeMessage();
 MimeMessageHelper messageHelper = new MimeMessageHelper(message);
 messageHelper.setFrom(deliver);
 messageHelper.setTo(receiver);
 messageHelper.setCc(carbonCopy);
 messageHelper.setSubject(subject);
 messageHelper.setText(content, isHtml);
 mailSender.send(message);
 logger.info("Send email success, cost {} million seconds", System.currentTimeMillis() - startTimestamp);
 } catch (MessagingException e) {
 logger.error("Send email failed, error message is {} n", e.getMessage());
 e.printStackTrace();
 }
 }
 /**
 * 发送带附件的邮件
 */ public void sendAttachmentFileEmail(String deliver, String[] receiver, String[] carbonCopy, String subject, String content, boolean isHtml, String fileName, File file) {
 long startTimestamp = System.currentTimeMillis();
 logger.info("Start send mail ...");
 try {
 MimeMessage message = mailSender.createMimeMessage();
 MimeMessageHelper messageHelper = new MimeMessageHelper(message, true);
 messageHelper.setFrom(deliver);
 messageHelper.setTo(receiver);
 messageHelper.setCc(carbonCopy);
 messageHelper.setSubject(subject);
 messageHelper.setText(content, isHtml);
 messageHelper.addAttachment(fileName, file);
 mailSender.send(message);
 logger.info("Send mail success, cost {} million seconds", System.currentTimeMillis() - startTimestamp);
 } catch (MessagingException e) {
 logger.error("Send mail failed, error message is {}n", e.getMessage());
 e.printStackTrace();
 }
 }
 /**
 * 发送模板邮件
 */ public void sendTemplateEmail(String deliver, String[] receiver, String[] carbonCopy, String subject, String template, Context context) {
 long startTimestamp = System.currentTimeMillis();
 logger.info("Start send mail ...");
 try {
 MimeMessage message = mailSender.createMimeMessage();
 MimeMessageHelper messageHelper = new MimeMessageHelper(message);
 String content = templateEngine.process(template, context);
 messageHelper.setFrom(deliver);
 messageHelper.setTo(receiver);
 messageHelper.setCc(carbonCopy);
 messageHelper.setSubject(subject);
 messageHelper.setText(content, true);
 mailSender.send(message);
 logger.info("Send mail success, cost {} million seconds", System.currentTimeMillis() - startTimestamp);
 } catch (MessagingException e) {
 logger.error("Send mail failed, error message is {} n", e.getMessage());
 e.printStackTrace();
 }
 }
}

src/main/resource/templates/mailTemplate.html 

 <!DOCTYPE html>
<html xmlns:th="#34;>
<head>
 <meta charset="UTF-8">
 <title>Title</title>
</head>
<body>
[[${content}]] <br/>
[[${content}]] <br/>
[[${content}]] <br/>
</body>
</html>

4. Test 

 @RunWith(SpringRunner.class)
@SpringBootTest
public class MailApplicationTests {
 @Autowired
 private MailUtil mailUtil;
 @Test
 public void sendSimpleEmail() {
 String deliver = "xxx@163.com";
 String[] receiver = {"xxx@gmail.com"};
 String[] carbonCopy = {"xxx@qq.com"};
 String subject = "This is a simple email";
 String content = "This is a simple content";
 try {
 mailUtil.sendSimpleEmail(deliver, receiver, carbonCopy, subject, content);
 } catch (Exception e) {
 assertFalse("Send simple email failed", true);
 e.printStackTrace();
 }
 }
 @Test
 public void sendHtmlMail(){
 String deliver = "xxx@163.com";
 String[] receiver = {"xxx@gmail.com"};
 String[] carbonCopy = {"xxx@qq.com"};
 String subject = "退信代码说明";
 String content = "<h1>org.springframework.mail.MailSendException: Failed messages: " +
 "com. sun .mail.smtp.SMTPSendFailedException: 554 DT:SPM 163 smtp9,DcCowAAXf2r4c8da2cPWBQ--." +
 "33626S3 1523020853,please see " +
 "#34;;
 boolean isHtml = true;
 mailUtil.sendHtmlEmail(deliver, receiver, carbonCopy, subject, content, isHtml);
 }
 @Test
 public void sendAttachmentFileEmail() {
 String FILE_PATH = "/Users/mengday/Desktop/02.png";
 String deliver = "xxx@163.com";
 String[] receiver = {"xxx@gmail.com"};
 String[] carbonCopy = {"xxx@qq.com"};
 String subject = "退信代码说明";
 String content = "<h1>org.springframework.mail.MailSendException: Failed messages: " +
 "com.sun.mail.smtp.SMTPSendFailedException: 554 DT:SPM 163 smtp9,DcCowAAXf2r4c8da2cPWBQ--." +
 "33626S3 1523020853,please see " +
 "#34;;
 boolean isHtml = true;
 File file = new File(FILE_PATH);
 String fileName = FILE_PATH.substring(FILE_PATH.lastIndexOf(File.separator));
 try {
 mailUtil.sendAttachmentFileEmail(deliver, receiver, carbonCopy, subject, content, isHtml, fileName, file);
 } catch (Exception e) {
 e.printStackTrace();
 assertFalse("Send attachment file email failed", true);
 }
 }
 @Test
 public void sendTemplateEmail() {
 String deliver = "xxx@163.com";
 String[] receiver = {"xxx@gmail.com"};
 String[] carbonCopy = {"xxx@qq.com"};
 String subject = "DT:SPM 发送的邮件内容包含了未被许可的信息，或被系统识别为垃圾邮件。请检查是否有用户发送病毒或者垃圾邮件";
 String template = "mailTemplate";
 String content = "554 DT:SPM 发送的邮件内容包含了未被许可的信息，或被系统识别为垃圾邮件。请检查是否有用户发送病毒或者垃圾邮件";
 Context context = new Context();
 context.setVariable("content", content);
 try {
 mailUtil.sendTemplateEmail(deliver, receiver, carbonCopy, subject, template, context);
 } catch (Exception e) {
 e.printStackTrace();
 assertFalse("Send template email failed", true);
 }
 }
}

注意：如果标题和内容过于简单，或者包含test之类的内容，163会认为这是垃圾邮件，会造成发送失败，报以下异常，解决办法就是将发送的表体和内容写的比较真实点 

 org.springframework.mail.MailSendException: Failed messages: 
com.sun.mail.smtp.SMTPSendFailedException: 554 DT:SPM 163 
smtp7,C8CowABH3LWqe8daHXmDNw--.3202S3 1523022763,please see

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文章来源：智云一二三科技

文章标题：(实用干货) | Spring Boot集成发送邮件Mail完整示例代码

文章地址：https://www.zhihuclub.com/181736.shtml

关于作者: 智云科技

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