AWS SNS SMS Direct Publishing in Java: No Topics Needed | Java AWS SNS SMS Integration Without Topic

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How to Send SMS Directly using AWS SNS in Java

Sending a text message shouldn't always require complex setups like creating "Topics." In this guide, I will show you how to use AWS Simple Notification Service (SNS) to send direct SMS messages to any phone number using Java.

Step 1: Prerequisites

• An active AWS Account.
• AWS SDK for Java dependencies added to your pom.xml.
• Your AWS User must have SNS:Publish permissions.

Step 2: Set Up the SMS Sandbox

AWS requires you to verify destination numbers if you are in the Sandbox environment:

1. Log into your AWS Console and search for SNS.
2. Go to Mobile -> Text messaging (SMS).
3. Under Sandbox destination phone numbers, click "Add phone number."
4. Enter your mobile number and verify it using the OTP sent to your phone.

Step 3: The Java Implementation

To send the message, we create an SnsClient and use a PublishRequest. Here is the logic:

// Initialize SNS Client
SnsClient snsClient = SnsClient.builder().build();

// Create Publish Request
PublishRequest request = PublishRequest.builder()
    .message("Hello from Ram N Java!")
    .phoneNumber("+1234567890")
    .build();

// Send SMS
PublishResponse result = snsClient.publish(request);
System.out.println("Message sent. ID: " + result.messageId());

Summary

By following these steps, you can integrate SMS notifications directly into your Java applications without the overhead of SNS Topics. This is perfect for one-time alerts, OTPs, or direct notifications.