Batch Put Item in DynamoDB Using Java (Guide w/ Code Examples)

You can use the batchWriteItem method of the AmazonDynamoDB client to put multiple items into a DynamoDB table in a single batch operation in Java.

import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder;
import com.amazonaws.services.dynamodbv2.model.Attribute.Attributevalue;
import com.amazonaws.services.dynamodbv2.model.putrequest;
import com.amazonaws.services.dynamodbv2.model.batchwriteitemrequest;
import com.amazonaws.services.dynamodbv2.model.batchwriteitemresult;

public class DynamoDBBatchPutExample {
    public static void main(String[] args) {
        AmazonDynamoDB client = AmazonDynamoDBClientBuilder.defaultClient();

        Map<String, List<WriteRequest>> requestItems = new HashMap<String, List<WriteRequest>>();

        List<WriteRequest> writeRequests = new ArrayList<WriteRequest>();
        writeRequests.add(new WriteRequest(new PutRequest(
                new Item().withPrimaryKey("id", 1).withString("name", "John")
                        .withNumber("age", 30))));
        writeRequests.add(new WriteRequest(new PutRequest(
                new Item().withPrimaryKey("id", 2).withString("name", "Jane")
                        .withNumber("age", 25))));
        requestItems.put("YourTableName", writeRequests);

        BatchWriteItemRequest request = new BatchWriteItemRequest()
                .withRequestItems(requestItems);

        BatchWriteItemResult result = client.batchWriteItem(request);

        System.out.println("Items inserted successfully!");
    }
}