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

To insert multiple items into a DynamoDB table in a single batch operation in Java, you can use the batchWriteItem method of the AmazonDynamoDB client. Here YourTableName is the table name where you want to insert the items.

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.writeitemrequest;
import com.amazonaws.services.dynamodbv2.model.batchwriteitemrequest;
import com.amazonaws.services.dynamodbv2.model.batchwriteitemresult;

public class DynamoDBBatchInsertExample {
    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!");
    }
}