How to serialize object to json with Jackson, including ArrayList

Question

I have this simple java object

public class Order {
    static public class Product {
        public String name;
        public Integer quantity;
        public Float price;
    }
    public String clientName;
    public String clientPhone;
    ArrayList<Product> products = new ArrayList<Product>();
    public Float total;
}

I want to serialize it to JSON using Jackson. I do like this:

    String _json;
    ObjectWriter ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
    _json = ow.writeValueAsString(order);

but it won't serialie the array list in my order, only the other members.

How do I serialize an object that contains an ArrayList? If it's not possible is there another container class that I can use which is easy to serialize?

Take a look at [Serializing with Jackson (JSON) - getting “No serializer found”?](https://stackoverflow.com/questions/8367312/serializing-with-jackson-json-getting-no-serializer-found) — Michał Ziober, Jan 17 '20 at 09:46

score 2 · Accepted Answer · answered Jan 17 '20 at 01:07

2

Jackson depends on public accessors to determine fields to serialize.

Your list is the only field that isn't publicly exposed, so that's why it's hidden in the output

answered Jan 17 '20 at 01:07

OneCricketeer

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How to serialize object to json with Jackson, including ArrayList

1 Answers1