How To Use Sendgrid In Java

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In this blog post, we will discuss how you can incorporate and utilize SendGrid in your Java applications to send emails. SendGrid is an online service that provides dependable delivery of transactional emails, scalability, and live analysis, among other functionalities.

Prerequisites

  • A SendGrid Account
  • Java Development Kit (JDK)

Step 1: Install SendGrid’s Java Library

First, you’ll need to add SendGrid’s Java Library to your project. If you’re using Maven, you can add the following dependency to your pom.xml file:

    <dependency>
        <groupid>com.sendgrid</groupid>
        <artifactid>sendgrid-java</artifactid>
        <version>4.7.1</version>
    </dependency>

Step 2: Create a new Java Class

Create a new Java class in your project. For this example, let’s call it SendGridEmailSender.

Step 3: Write the Code to Send Email

In your SendGridEmailSender class, you will need to create a method to send an email. Let’s call this method sendEmail(). The code will look like this:

    import com.sendgrid.*;

    public class SendGridEmailSender {
        public void sendEmail() throws Exception {
            Email from = new Email("test@example.com");
            String subject = "Hello World from SendGrid";
            Email to = new Email("test@example.com");
            Content content = new Content("text/plain", "Hello, Email!");
            Mail mail = new Mail(from, subject, to, content);

            SendGrid sg = new SendGrid(System.getenv("SENDGRID_API_KEY"));
            Request request = new Request();
            try {
                request.setMethod(Method.POST);
                request.setEndpoint("mail/send");
                request.setBody(mail.build());
                Response response = sg.api(request);
                System.out.println(response.getStatusCode());
                System.out.println(response.getBody());
                System.out.println(response.getHeaders());
            } catch (IOException ex) {
                throw ex;
            }
        }
    }

You’ll need to replace “SENDGRID_API_KEY” with your actual SendGrid API Key. Also, replace the ‘from’ and ‘to’ email addresses with valid ones.

Step 4: Invoke the Method

To send the email, you simply need to create an instance of SendGridEmailSender and invoke the sendEmail() method. Like this:

    SendGridEmailSender emailSender = new SendGridEmailSender();
    emailSender.sendEmail();

When you run your application, an email will be sent through SendGrid!

Conclusion

SendGrid provides a straightforward and reliable way to send emails in Java. Whether you’re sending transactional emails, notifications, or anything else, it’s a great tool to have in your arsenal. Happy emailing!