GetItem in DynamoDB Using Java (Guide w/ Code Examples)

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 123from 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);
    }
}