2.01 Send e-mail

Send e-mail using a spring boot

When the user registration, send a message to the user, allowing users to iodine link in the message to complete the account activation!

Send e-mail client code

package com.nowcoder.community.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

@Component
public class MailClient {

	private static final Logger logger = LoggerFactory.getLogger(MailClient.class);

	@Autowired
	private JavaMailSender mailSender;

	@Value("${spring.mail.username}")
	private String from;

	/***
	 * 
	 * @param to 发送邮件给谁？
	 * @param subject
	 * @param content
	 */
	public void sendMail(String to, String subject, String content) {
		try {
			MimeMessage message = mailSender.createMimeMessage();
			MimeMessageHelper helper = new MimeMessageHelper(message);
			helper.setFrom(from);
			helper.setTo(to);
			helper.setSubject(subject);
			helper.setText(content, true);
			mailSender.send(helper.getMimeMessage());
		} catch (MessagingException e) {
			logger.error("发送邮件失败:" + e.getMessage());
		}
	}

}

　　

springboot mail related configuration

application.properties

MailProperties # 
spring.mail.host = smtp.sina.cn 
spring.mail.port = 465 
[email protected] 
# 0fcd058d89ee14a8 (client authorization code) 
# NOTE: Sina-mail client open after authorization code use only the authorization code login, password authentication can not be used 
spring.mail.password = 0fcd058d89ee14a8 
spring.mail.protocol = SMTPS 
spring.mail.properties.mail.smtp.ssl.enable to true =

　　

Unit test classes

package com.nowcoder.community;

import com.nowcoder.community.util.MailClient;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

@RunWith(SpringRunner.class)
@SpringBootTest
@ContextConfiguration(classes = CommunityApplication.class)
public class MailTests {

    @Autowired
    private MailClient mailClient;

    @Autowired
    private TemplateEngine templateEngine;

    @Test
    public void testTextMail() {
        mailClient.sendMail("[email protected]", "TEST", "Welcome.");
    }

    @Test
    public void testHtmlMail() {
        Context context = new Context();
        context.setVariable("username", "sunday");

        String content = templateEngine.process("/mail/demo", context);
        System.out.println(content);

        mailClient.sendMail("[email protected]", "HTML", content);
    }

}

　

Test results

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.1.5.RELEASE)

2020-03-22 15:55:32,814 INFO [main] c.n.c.MailTests [StartupInfoLogger.java:50] Starting MailTests on lzph-pc with PID 8360 (started by admin in E:\nowcoder\nowcoder-workspace\community-2.1)
2020-03-22 15:55:32,817 DEBUG [main] c.n.c.MailTests [StartupInfoLogger.java:53] Running with Spring Boot v2.1.5.RELEASE, Spring v5.1.7.RELEASE
2020-03-22 15:55:32,819 INFO [main] c.n.c.MailTests [SpringApplication.java:675] No active profile set, falling back to default profiles: default
2020-03-22 15:55:40,542 INFO [main] o.s.s.c.ThreadPoolTaskExecutor [ExecutorConfigurationSupport.java:171] Initializing ExecutorService 'applicationTaskExecutor'
2020-03-22 15:55:41,497 INFO [main] o.s.b.a.w.s.WelcomePageHandlerMapping [WelcomePageHandlerMapping.java:61] Adding welcome page template: index
2020-03-22 15:55:42,665 INFO [main] c.n.c.MailTests [StartupInfoLogger.java:59] Started MailTests in 11.173 seconds (JVM running for 13.768)
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>邮件示例</title>
</head>
<body>
    <p>欢迎你, <span style="color:red;">sunday</span>!</p>
</body>
</html>
2020-03-22 15:55:50,367 INFO [Thread-3] o.s.s.c.ThreadPoolTaskExecutor [ExecutorConfigurationSupport.java:208] Shutting down ExecutorService 'applicationTaskExecutor'