我如何通过Gson java传递这个转义的Json? [英] How do I pass this escaped Json with Gson java?
问题描述
{
消息:someName someLastName向你发送了一个问题,
parameters:{\firstName\:\someName\,\lastName\:\someLastName \},
id:141
}
在一目了然看起来很简单,但参数元素需要作为json对象来读取,而我不能为我的生活找出如何去做。这是我现在正在尝试的:
JsonObject parameters = data.getAsJsonObject()。get(parameters)。 getAsJsonObject();
/ throws java.lang.IllegalStateException:不是JSON对象:{\firstName \:\someName \,\lastName \:\someLastName \ }
所以我试过了:
String elementToString = data.getAsJsonObject()。get(parameters)。toString()。replace(\\,\);
JsonObject parameters = new Gson()。fromJson(elementToString,JsonElement.class).getAsJsonObject();
// throws com.google.gson.JsonSyntaxException:com.google.gson.stream.MalformedJsonException:使用JsonReader.setLenient(true)在第1行接受格式错误的JSON第5行路径$
数据在哪里(通常是从服务器取得的):
<$ p jsonElement data = new Gson()。fromJson({\ n+
\message \:\someName someLastName发送给您一个问题,\ n+
\参数\:\{\\\名字\\\\:\\\someName\\ \\,lastname \\\:\\\someLastName \\\\\} \,\\\
+
\id \:141 \\\
+
},JsonElement.class);
当然,这不是一个难题?
你在这里
parameters:{\firstName \:\someName \,\lastName\:\someLastName \},
是一个JSON对,其中名称(始终是JSON字符串)和值都是JSON字符串。该值是一个可以解释为JSON对象的字符串。所以做到这一点
字符串jsonString = data.getAsJsonObject()。get(parameters)。getAsJsonPrimitive()。getAsString( );
JsonObject参数= gson.fromJson(jsonString,JsonObject.class);
以下
Gson gson = new Gson();
JsonElement data = gson
.fromJson({\ n+\message \:\someName someLastName has sent a question \,\\\
+\参数\:\{\\\firstName \\\:\\\someName \\\,\\ \\lastName \\\:\\\someLastName\\\} \,\\\
+\id \\ \\:141 \\\
+},JsonElement.class);
String jsonString = data.getAsJsonObject()。get(parameters)。getAsJsonPrimitive()。getAsString();
JsonObject参数= gson.fromJson(jsonString,JsonObject.class);
System.out.println(parameters);
输出该 JsonObject
的JSON文本表示形式,
{firstName:someName,lastName:someLastName}
So I'm getting responses like the following which I have no control over:
{
"message": "someName someLastName has sent you a question",
"parameters": "{\"firstName\":\"someName\",\"lastName\":\"someLastName\"}",
"id": 141
}
At a glance it seems simple, but the parameters element needs to be read as a json object and I cannot for the life of me work out how to do it. This is what I am trying at the moment:
JsonObject parameters = data.getAsJsonObject().get("parameters").getAsJsonObject();
/throws java.lang.IllegalStateException: Not a JSON Object: "{\"firstName\":\"someName\",\"lastName\":\"someLastName\"}"
So I tried:
String elementToString = data.getAsJsonObject().get("parameters").toString().replace("\\\"", "\"");
JsonObject parameters = new Gson().fromJson(elementToString, JsonElement.class).getAsJsonObject();
//throws com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 5 path $
Where data is (typically this is pulled from a server):
JsonElement data = new Gson().fromJson(" {\n" +
" \"message\": \"someName someLastName has sent you a question\",\n" +
" \"parameters\": \"{\\\"firstName\\\":\\\"someName\\\",\\\"lastName\\\":\\\"someLastName\\\"}\",\n" +
" \"id\": 141\n" +
" }", JsonElement.class);
Surely this is not a difficult problem?
What you have here
"parameters": "{\"firstName\":\"someName\",\"lastName\":\"someLastName\"}",
is a JSON pair where both the name (which is always a JSON string) and the value are JSON strings. The value is a String that can be interpreted as a JSON object. So do just that
String jsonString = data.getAsJsonObject().get("parameters").getAsJsonPrimitive().getAsString();
JsonObject parameters = gson.fromJson(jsonString, JsonObject.class);
The following
Gson gson = new Gson();
JsonElement data = gson
.fromJson(" {\n" + " \"message\": \"someName someLastName has sent you a question\",\n"
+ " \"parameters\": \"{\\\"firstName\\\":\\\"someName\\\",\\\"lastName\\\":\\\"someLastName\\\"}\",\n"
+ " \"id\": 141\n" + " }", JsonElement.class);
String jsonString = data.getAsJsonObject().get("parameters").getAsJsonPrimitive().getAsString();
JsonObject parameters = gson.fromJson(jsonString, JsonObject.class);
System.out.println(parameters);
prints the JSON text representation of that JsonObject
{"firstName":"someName","lastName":"someLastName"}
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