请问怎么把jsonArray中的object转成array吗

Question

 

Answer 1

public static void main(String[] args) {
        String str = "[{\n" +
                "\t\"a\": [{\n" +
                "\t\t\"b\": []\n" +
                "\t}]\n" +
                "}]";
        List<Map<String, Object>> a = JSON.parseObject(str, List.class);
        System.out.println(a);
        List<Object> b = JSON.parseObject(a.get(0).get("a").toString(), List.class);
        System.out.println(b);
    }
//[{"a":[{"b":[]}]}]
//[{"b":[]}]