objectMapper.readTree(objectMapper.writeValueAsString(@params))

Question

public IDictionary<string, string> @params;
public IDictionary<string, string> xParams;
public BlockObject[] processes;
public string mimeType;
public long totalSize;

public virtual JsonNode toJSON()
{
    ObjectMapper objectMapper = new ObjectMapper();
    ObjectNode json = JsonNodeFactory.instance.objectNode();
    ArrayNode process = JsonNodeFactory.instance.arrayNode();
    foreach (BlockObject p in processes)
    {
        process.add(p.toJSON());
    }
    json.put("processes", process);
    json.put("mimeType", mimeType);
    if (@params != null)
    {
        json.put("params", objectMapper.readTree(objectMapper.writeValueAsString(@params)));
    }
    if (xParams != null)
    {
        json.put("xParams", objectMapper.readTree(objectMapper.writeValueAsString(xParams)));
    }
    return json;
}

我把上面的Java代码改写为下面的C#代码，遇到了很多困难，求帮助，指出我下面代码的错误。

public virtual JsonNode toJSON()
{
    ObjectMapper objectMapper = new ObjectMapper();
    ObjectNode json = JsonNodeFactory.instance.objectNode();
    ArrayNode process = JsonNodeFactory.instance.arrayNode();
    foreach (BlockObject p in processes)
    {
        process.add(p.toJSON());
    }
    json.put("processes", process);
    json.put("mimeType", mimeType);
    if (@params != null)
    {
        json.put("params", objectMapper.readTree(objectMapper.writeValueAsString(@params)));
    }
    if (xParams != null)
    {
        json.put("xParams", objectMapper.readTree(objectMapper.writeValueAsString(xParams)));
    }
    return json;
}

Answer 1

不要用 Jackson 的思维来写 Json.Net，确定你的目的，直接用 Json.Net 写就好了。用 Json.Net 处理模型、Json字符器和 JToken 之间的转换是很容易的

Jackson 我没用过，但是估计它应该也有更方便的工具，不可能这么弱的

static JToken ToJson(IEnumerable<BlockObject> process, object @params, object xParams)
{
    return JToken.FromObject(new {
        processes = process,
        mimeType = "image/png",
        @params,
        xParams
    }, new JsonSerializer {
        NullValueHandling = NullValueHandling.Ignore
    });
}