将 JsonObject 转换为字符串

Question

{
    "data": 
    {
        "map":
        {
            "allowNestedValues": true,
            "create": "2012-12-11 15:16:13",
            "title": "test201212110004",
            "transitions": []
        }
    },
    "msg": "success",
    "code": "0"
}

上面是一个JsonObject ， data是一个JsonObject 。

如您所知，如何将其转换为像"msg":"success"这样的String ，我不能直接在data的值之外添加双引号。

Answer 1

有一个内置方法可以将 JSONObject 转换为字符串。 你为什么不使用它：

JSONObject json = new JSONObject();

json.toString();

Answer 2

您可以使用：

JSONObject jsonObject = new JSONObject();
jsonObject.toString();

如果你想获得一个特定的值，你可以使用：

jsonObject.getString("msg");

或整数值

jsonObject.getInt("codeNum");

Answer 3

您可以使用

JsonObject.getString("msg"); 

Answer 4

您可以尝试 Gson 转换器，以获得像 json.stringify 这样的精确转换

val jsonString:String = jsonObject.toString()
val gson:Gson = GsonBuilder().setPrettyPrinting().create()
val json:JsonElement = gson.fromJson(jsonString,JsonElement.class)
val jsonInString:String= gson.toJson(json)
println(jsonInString)

Answer 5

用这个：

JSONObject json = new JSONObject();
JSONObject.valueToString(json.toString());

Answer 6

在括号外添加双引号并将{}内的双引号替换为\\"

所以： "{\\"data\\":{..... }"

Answer 7

JsonObject 似乎是 JSON-P API。 如果这是真的，我将使用 JsonWritter 将 JsonValue 写入 StringWriter：

    JsonObjectBuilder pokemonBuilder = Json.createObjectBuilder();
    pokemonBuilder.add("name", "Pikachu");
    pokemonBuilder.add("type", "electric");
    pokemonBuilder.add("cp", 827);
    pokemonBuilder.add("evolve", true);
    JsonObject pokemon = pokemonBuilder.build();
    StringWriter sw = new StringWriter(128);
    try (JsonWriter jw = Json.createWriter(sw)) {
        jw.write(pokemon);
    }
    String pokemonStr = sw.toString();

Answer 8

JSONObject metadata = (JSONObject) data.get("map"); //for example
String jsonString = metadata.**toJSONString()**;

Answer 9

只需使用 ObjectMapper

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS,false);
//here more config opts...
Car car = new Car("yellow", "renault");
objectMapper.writeValue(new File("target/car.json"), car);
String carAsString = objectMapper.writeValueAsString(car);

Answer 10

JSONObject data = (JSONObject) data.get("map"); 
 //for example
String jsonString = data.toJSONString();

Answer 11

     This should get all the values from the above JsonObject  
     System.out.println(jsonObj.get("msg"));
     System.out.println(jsonObj.get("code"));

     JsonObject obj= jsonObj.get("data").getAsJsonObject().get("map").getAsJsonObject();
     System.out.println(obj.get("allowNestedValues"));
     System.out.println(obj.get("create"));
     System.out.println(obj.get("title"));
     System.out.println(obj.get("transitions"));

Answer 12

您可以使用可靠的库 GSON

private static final Type DATA_TYPE_JSON = 
        new TypeToken<JSONObject>() {}.getType();           
JSONObject orderJSON = new JSONObject();
orderJSON.put("noOfLayers", "2");
orderJSON.put("baseMaterial", "mat");
System.out.println("JSON == "+orderJSON.toString());
String dataAsJson = new Gson().toJson(orderJSON, DATA_TYPE_JSON);
System.out.println("Value of dataAsJson == "+dataAsJson.toString());
String data = new Gson().toJson(dataAsJson);
System.out.println("Value of jsonString == "+data.toString());

Answer 13

 var data= {"data": {"map":{"allowNestedValues": true,"create": "2012-12-11 15:16:13","title": "test201212110004","transitions": []}},"msg": "success","code": "0"}

开/关：

Object {data: Object, msg: "success", code: "0"}

使用 JSON.stringify 将整个数据转换为如下所示的字符串

var stringData = JSON.stringify(data);

开/关：

"{"data":{"map":{"allowNestedValues":true,"create":"2012-12-11 15:16:13","title":"test201212110004","transitions":[]}},"msg":"success","code":"0"}"

使用 JSON.parse 将整个字符串对象转换为 JSON 对象，如下所示

var orgdata = JSON.parse(stringData);

开/关：

Object {data: Object, msg: "success", code: "0"}

Answer 14

我认为你需要这个：

假设您有这样的示例JSON ：

{"ParamOne":"InnerParamOne":"InnerParamOneValue","InnerParamTwo":"InnerParamTwoValue","InnerParamThree":"InnerParamThreeValue","InnerParamFour":"InnerParamFourValue","InnerParamFive":"InnerParamFiveValue"}}

转换为字符串：

String response = {\"ParamOne\":{\"InnerParamOne\":\"InnerParamOneValue\",\"InnerParamTwo\":\"InnerParamTwoValue\",\"InnerParamThree\":\"InnerParamThreeValue\",\"InnerParamFour\":\"InnerParamFourValue\",\"InnerParamFive\":\"InnerParamFiveValue\"}} ;

只需将“替换为\\”