如何配置 spring-boot 以通过 sendGrid 发送电子邮件？

Question

目前我将我的应用程序配置为通过 spring-mail 发送电子邮件，我的代码如下所示：

@Autowired
private JavaMailSender sender;
.....
//send email 
MimeMessage message = sender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message,
                    MimeMessageHelper.MULTIPART_MODE_MIXED_RELATED,
                    StandardCharsets.UTF_8.name());
Template template = freemarkerConfig.getTemplate(templateFileName);
            String html = FreeMarkerTemplateUtils.processTemplateIntoString(template, props);    
helper.setTo(to);
helper.setText(html, true);
helper.setSubject(subject);
helper.setFrom(from);
sender.send(message);

现在我有任务使用sendGrid 重写它。

我在 google 上搜索了这个话题，发现 java 有像这样的sendGrid api ：

import com.sendgrid.*;

public class SendGridExample {
  public static void main(String[] args) {
    SendGrid sendgrid = new SendGrid("SENDGRID_APIKEY");

    SendGrid.Email email = new SendGrid.Email();

    email.addTo("test@sendgrid.com");
    email.setFrom("you@youremail.com");
    email.setSubject("Sending with SendGrid is Fun");
    email.setHtml("and easy to do anywhere, even with Java");

    SendGrid.Response response = sendgrid.send(email);
  }
}

我还发现了以下课程：SendGridAutoConfiguration 我也从那里遇到了以下片段：

# SENDGRID (SendGridAutoConfiguration)
spring.sendgrid.api-key= # SendGrid api key (alternative to username/password).
spring.sendgrid.username= # SendGrid account username.
spring.sendgrid.password= # SendGrid account password.
spring.sendgrid.proxy.host= # SendGrid proxy host.
spring.sendgrid.proxy.port= # SendGrid proxy port.

看起来 spring boot 已经与 sendGrid 集成了。

但是我找不到这种集成的完整示例。
请与我分享例子？

Answer 1

SendGrid如果它在类路径上，Spring-Boot 会自动配置。

Maven 依赖

将库作为 maven 依赖项包含在内（参见https://github.com/sendgrid/sendgrid-java）例如。使用渐变：

compile 'com.sendgrid:sendgrid-java:4.1.2'

Spring Boot Sendgrid 配置属性

配置 SendGrid 属性（参见https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html）

# SENDGRID (SendGridAutoConfiguration)
spring.sendgrid.api-key= # SendGrid api key (alternative to username/password).
spring.sendgrid.username= # SendGrid account username.
spring.sendgrid.password= # SendGrid account password.
spring.sendgrid.proxy.host= # SendGrid proxy host. (optional)
spring.sendgrid.proxy.port= # SendGrid proxy port. (optional)

用法

Spring Boot 会SendGrid自动创建Bean。有关如何使用它的示例，请参阅https://github.com/sendgrid/sendgrid-java。

class SendGridMailService {

    SendGrid sendGrid;

    public SendGridMailService(SendGrid sendGrid) {
        this.sendGrid = sendGrid;
    }

    void sendMail() {
        Email from = new Email("test@example.com");
        String subject = "Sending with SendGrid is Fun";
        Email to = new Email("test@example.com");
        Content content = new Content("text/plain", "and easy to do anywhere, even with Java");
        Mail mail = new Mail(from, subject, to, content);

        Request request = new Request();
        try {
            request.setMethod(Method.POST);
            request.setEndpoint("mail/send");
            request.setBody(mail.build());
            Response response = this.sendGrid.api(request);
            sendGrid.api(request);

            // ...
        } catch (IOException ex) {
            // ...
        }
    }
}