GetItem in DynamoDB Using Java (Guide w/ Code Examples)
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Provided by Rafal Wilinski
You can use the getTable
method followed by a getItem
method to fetch an item belonging to a particular table via a given partition key.
The following code will retrieve an item with a primary key (id
) value of 123
from the table my-table
and prints the value of the name
attribute.
import com.amazonaws.services.dynamodbv2.AmazonDynamoDB; import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder; import com.amazonaws.services.dynamodbv2.document.DynamoDB; import com.amazonaws.services.dynamodbv2.document.Item; import com.amazonaws.services.dynamodbv2.document.PrimaryKey; import com.amazonaws.services.dynamodbv2.document.Table; public class GetItemExample { public static void main(String[] args) { AmazonDynamoDB client = AmazonDynamoDBClientBuilder.standard().build(); DynamoDB dynamoDB = new DynamoDB(client); String tableName = "my-table"; Table table = dynamoDB.getTable(tableName); String primaryKeyName = "id"; int primaryKeyValue = 123; PrimaryKey primaryKey = new PrimaryKey(primaryKeyName, primaryKeyValue); Item item = table.getItem(primaryKey); // Use the item as neededString attributeName = "name"; String name = item.getString(attributeName); System.out.println("Retrieved item: " + name); } }
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