仿牛客网社区项目（三）发送邮件

发送邮件

邮箱设置
- 启用客户端SMTP服务
Spring Email
- 导入 jar 包
- 邮箱参数配置
- 使用 JavaMailSender 发送邮件
模板引擎
- 使用 Thymeleaf 发送 HTML 邮件

1.前置服务#

开启邮箱pop3/SMTP服务

①导入相关jar包

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-mail</artifactId>
	<version>2.3.7.RELEASE</version>
</dependency>

②配置相关的邮箱参数

#MailProperties
spring.mail.host=smtp.qq.com
spring.mail.port=465
spring.mail.username=******@qq.com
spring.mail.password=********
spring.mail.protocol=smtps
spring.mail.properties.mail.smtp.ssl.enable=true

③使用javaMailSender发送邮件
首先将发送邮件的逻辑封装，以便反复使用，新建一个工具包util，并在包下新建一个工具类MailClient

@Component
public class MailClient {
    private static final Logger logger= LoggerFactory.getLogger(MailClient.class);
    @Autowired
    private JavaMailSender mailSender;
    @Value("${spring.mail.username}")
    private String from;
    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());
        }
    }
}

在测试类中进行测试发送文本邮件

@Autowired
    private MailClient mailClient;
    @Autowired
    private TemplateEngine templateEngine;
    @Test
    public void testTextMail(){
        mailClient.sendMail("******@******.edu.cn","TEST","Welcome.");
    }

3.模板引擎——使用Thymeleaf发送模板引擎

①在template包下的mail文件夹新建一个模板

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>邮件示例</title>
</head>
<body>
<p>欢迎你，<span style="color:#ff0000;" th:text="${username}"></span></p>
</body>
</html>

使用模板引擎生成动态网页，再通过MailClient即可完成发送

@SpringBootTest
@ContextConfiguration(classes=CommunityApplication.class)
public class MailTests {
    @Autowired
    private MailClient mailClient;
    @Autowired
    private TemplateEngine templateEngine;
    @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("*****@*****","HTML",content);
    }
}