Delete Multiple Items in DynamoDB Using Java (Guide w/ Code Examples)

To delete multiple items from a DynamoDB table in Java, you can use the batchWriteItem method of the AmazonDynamoDBClient class. This method lets you delete up to 25 items in a single request. The example below demonstrates how to use the batchWriteItem method to delete items from a table called "myTable".

import java.util.ArrayList;
import java.util.List;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.model.AttributeValue;
import com.amazonaws.services.dynamodbv2.model.DeleteRequest;
import com.amazonaws.services.dynamodbv2.model.WriteRequest;

// Replace "tableName" with the name of your DynamoDB table
String tableName = "tableName";

// Create a DynamoDB client
AmazonDynamoDBClient client = new AmazonDynamoDBClient();

// Create a list of delete requests
List<WriteRequest> requests = new ArrayList<>();

// Add delete requests to the list
for (int i = 0; i < 25; i++) {
    AttributeValue value = new AttributeValue().withN(Integer.toString(i));
    DeleteRequest request = new DeleteRequest().withKey(Map.of("id", value));
    requests.add(new WriteRequest().withDeleteRequest(request));
}

// Delete the items from the table
client.batchWriteItem(Map.of(tableName, requests));