Java 如何向 JsonObject 添加新的字段/元素？
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How to add new Fields/Elements to JsonObject?
提问by Lemon Juice
Here is my code. It is an attempt to read JSON using the GSONlibrary.
这是我的代码。这是使用GSON库读取 JSON 的尝试。
JsonReader reader = new JsonReader( new BufferedReader(new InputStreamReader(s3Object.getObjectContent())) );
reader.beginArray();
int gsonVal = 0;
while (reader.hasNext()) {
JsonParser _parser = new JsonParser();
JsonElement jsonElement = _parser.parse(reader);
JsonObject jsonObject1 = jsonElement.getAsJsonObject();
}
Now, I need to add 2 additional fields to this JsonObject. I need to add primary_keyfield and hash_indexfield.
现在，我需要为此添加 2 个附加字段JsonObject。我需要添加primary_key字段和hash_index字段。
I tried the below, but it didn't work.
我尝试了下面的方法，但没有用。
jsonObject1.add("hash_index", hashIndex.toString().trim());
jsonObject1.add("primary_key", i);
When these two values are added, the JsonObject will look like below.
添加这两个值后，JsonObject 将如下所示。
{
"hash_index": "00102x05h06l0aj0dw",
"body": "Who's signing up for Obamacare?",
"_type": "ArticleItem",
"title": "Who's signing up for Obamacare? - Jan. 13, 2014",
"source": "money.cnn.com",
"primary_key": 0,
"last_crawl_date": "2014-01-14",
"url": "http://money.cnn.com/2014/01/13/news/economy/obamacare-enrollment/index.html"
}
How can I do this? This is my first time with GSON.
我怎样才能做到这一点？这是我第一次使用 GSON。
采纳答案by Asif Bhutto
You have to use the JsonObject#addProperty()
你必须使用 JsonObject#addProperty()
final JsonObject json = new JsonObject();
json.addProperty("type", "ATP");
In Your case
在你的情况下
jsonObject1.addProperty("hash_index", hashIndex.toString().trim());
jsonObject1.addProperty("primary_key", i);
回答by Anirban Nag 'tintinmj'
You have to use putmethod.
你必须使用put方法。
jsonObject1.put("hash_index", hashIndex.toString().trim());
jsonObject1.put("primary_key", i);
From your comment it's look like you have to use addPropertymethod.
从您的评论看来，您必须使用addProperty方法。
jsonObject1.addProperty("hash_index", hashIndex.toString().trim());
jsonObject1.addProperty("primary_key", i);
回答by Lakmal Vithanage
Use put method. jsonObject1.put("hash_index", hashIndex.toString().trim());
jsonObject1.put("primary_key", i);
使用 put 方法。 jsonObject1.put("hash_index", hashIndex.toString().trim());
jsonObject1.put("primary_key", i);
