Jackson form submit checkboxes

I have a form with checkboxes, on form submit. If one checked, it comes in as string, if multiple checked, it comes in as an json array.

How do I get the object as an array?

TypeReference<HashMap> typeRef = new TypeReference<HashMap>(){};

    JsonFactory factory = new JsonFactory();
    ObjectMapper mapper = new ObjectMapper(factory);

 开发者_运维技巧   HashMap<String, Object> bean = mapper.readValue(formBean, typeRef);

bean.get("somevarible") < I want to get this as array regardless how many boxes checked

Thanks

EDIT

I am using this function, how can I update it?

    $.fn.serializeObject = function() {
    var o = {};
    var a = this.serializeArray();

    $.each(a, function() {
    if (o[this.name]) {
        if (!o[this.name].push) {
            o[this.name] = [o[this.name]];
        }
        o[this.name].push(this.value || '');
    } else {
        o[this.name] = this.value || '';
    }
    });
    return o;
    };

I had a similar issue deserializing json (aka "the checkbox problem"). My (ugly) work-around was to use @JsonAnySetter to manually do the "right" thing with the incoming (string/list) value.

// q is always just a string.
@JsonProperty("q")
private String query;
// fq could be a string or a list.
private List<String> filterQuery;
// (get/set/add omitted)

// XXX - this is an evil hack to support 1 or >1 fq values 
// there must be a better way to support 2-way deserialization
@JsonAnySetter
void addEntry(String key, Object value)
{
    if ("fq".equals(key))
    {
        if (value == null)
        {
            // can this even happen?
        } else if (String.class.equals(value.getClass()))
        {
            addFilterQuery((String) value);
        } else 
        {
            setFilterQuery((List<String>) value);
        }
    }
}