Remove with DynamoDB Mapper (Guide w/ Code Examples)

You can use the method to remove an item from a table using the DynamoDB Mapper. This method takes an object representing the item to delete and deletes it from the table.

DynamoDBMapper mapper = new DynamoDBMapper(client);

Item item = new Item();
item.setId(123); // Set the primary key value

// Delete the item
mapper.delete(item);

The delete method only works for tables that have a single primary key attribute. If your table has a composite primary key (a primary key made up of multiple attributes), you will need to use the delete method of the AmazonDynamoDB client, which takes a DeleteItemRequest object as a parameter.

Map<String, AttributeValue> key = new HashMap<>();
key.put("attr1", new AttributeValue().withS("value1"));
key.put("attr2", new AttributeValue().withN("123"));

DeleteItemRequest deleteItemRequest = new DeleteItemRequest()
        .withTableName("myTable")
        .withKey(key);

client.deleteItem(deleteItemRequest);