可以为标准类定制jackson序列化程序吗?(例如list<list<string>>)

我想可能是这样的。我不知道序列化时要使用的逻辑,所以我编写了简单的json数组[][]

private static class ListListSerializer extends StdSerializer<List<List<String>>>{
    protected ListListSerializer(Class<List<List<String>>> t) {
        super(t);
    }
    protected ListListSerializer(){
        this(null);
    }


    @Override
    public void serialize(List<List<String>> lists, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
        jsonGenerator.writeStartArray();
        for (List<String> strings : lists) {
            jsonGenerator.writeStartArray();
            for (String string : strings) {
                jsonGenerator.writeString(string);
            }
            jsonGenerator.writeEndArray();
        }
        jsonGenerator.writeEndArray();
    }
}

例如不含mixin

private static class YourObject {

     private List<List<String>> myStrings = new ArrayList<>();

    public YourObject() {
        List<String> a = Arrays.asList("a","b","c");
        List<String> b = Arrays.asList("d","f","g");
        myStrings.add(a);
        myStrings.add(b);
}

    @JsonSerialize(using = ListListSerializer.class)
    public Object getMyStrings(){
       return myStrings;
    }
}


public static void main(String[] args) throws IOException {
    ObjectMapper mapper = new ObjectMapper();
    System.out.println(mapper.writeValueAsString(new YourObject()));
}

输出是

{"myStrings":[["a","b","c"],["d","f","g"]]}

这就是你想做的吗?