How do I use DynamoDBAutoGeneratedKey to give me an auto generated key?

问题

I need to use DynamoDBAutoGeneratedKey from the AWS SDK to give me a random key(of type String) that I can then use to do something. I can't find any examples online of doing this, and while it seems like it should be relatively straightforward I am really struggling to get this working. Can anyone link me to an example of this being used?

回答1:

Found easy answer.

String uniqueID = UUID.randomUUID().toString();

Screw using DynamoDBAutoGeneratedKey, sounds like a headache.

回答2:

@DynamoDBTable( tableName = "Details")
public class Details
{
    @DynamoDBGeneratedUuid( DynamoDBAutoGenerateStrategy.CREATE )
    private UUID id;
    ....
    @DynamoDBHashKey(attributeName = "id")
    @DynamoDBAutoGeneratedKey
    public UUID getId()
    {
        return id; 
    }
    // also you need to add the setter otherwise you will get an exception
    public void setId(UUID id)
    {
        this.id = id;
    }
...

来源：https://stackoverflow.com/questions/37912236/how-do-i-use-dynamodbautogeneratedkey-to-give-me-an-auto-generated-key