Java - Json 数组到 json 对象

Question

这看起来很简单，但我正在努力改变它:

{
    "myList": [{
        "id": 1,
        "type": "EnergyBox",
        "properties": ["Name : Eb1", "Prop2 : Val1", "PropN : ValN"]
    }, {
        "id": 2,
        "type": "EnergyBox",
        "properties": ["Name : Eb2", "Prop2 : Val2", "Prop3 : Val3"]
    }]
}

进入这个:

{
    "myList": [{
        "id": 1,
        "type": "EnergyBox",
        "properties": {
            "Name": "Eb1",
            "Prop2": "Val1",
            "PropN": "ValN"
        }
    }, {
        "id": 2,
        "type": "EnergyBox",
        "properties": {
            "Name": "Eb2",
            "Prop2": "Val2",
            "Prop3": "Val3"
        }
    }]
}

我正在使用 Java 8、Jackson 和 Simplejson 来解析数据，但不知何故，经过数小时的尝试，仍然无法正常工作。

Answer 1

我尝试根据您的要求转换 Json，请尝试以下代码。

public void test() throws JsonParseException, JsonMappingException, IOException {


    String json = "{"+
                        "\"myList\": [{"+
                        "\"id\": 1,"+
                        "\"type\": \"EnergyBox\","+
                        "\"properties\": [\"Name : Eb1\", \"Prop2 : Val1\", \"PropN : ValN\"]"+
                    "}, {"+
                        "\"id\": 2,"+
                        "\"type\": \"EnergyBox\","+
                        "\"properties\": [\"Name : Eb2\", \"Prop2 : Val2\", \"Prop3 : Val3\"]"+
                    "}]"+
                "}";

    ObjectMapper mapper = new ObjectMapper();
    JsonNode root = mapper.readTree(json);
    JsonNode myList = root.get("myList");
    myList.forEach(n -> {
        System.out.println(n);
        System.out.println(n.get("properties"));
        ObjectNode updatedProperties = mapper.createObjectNode();
        n.get("properties").forEach(p -> {
            String[] vals = p.textValue().split(":");
            updatedProperties.put(vals[0].trim(), vals[1].trim());
        });
        ((ObjectNode)n).put("properties", updatedProperties);
    });

    System.out.println(myList);


}