Java 如何使用字符串创建 JSON 对象？
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How to create JSON Object using String?
提问by ravi
I want to create a JSON Object using String.
我想使用字符串创建一个 JSON 对象。
Example :
JSON {"test1":"value1","test2":{"id":0,"name":"testName"}}
示例：JSON {"test1":"value1","test2":{"id":0,"name":"testName"}}
In order to create the above JSON I am using this.
为了创建上述 JSON，我正在使用它。
String message;
JSONObject json = new JSONObject();
json.put("test1", "value1");
JSONObject jsonObj = new JSONObject();
jsonObj.put("id", 0);
jsonObj.put("name", "testName");
json.put("test2", jsonObj);
message = json.toString();
System.out.println(message);
I want to know how can I create a JSON which has JSON Array in it.
我想知道如何创建一个包含 JSON 数组的 JSON。
Below is the sample JSON.
下面是示例 JSON。
{
"name": "student",
"stu": {
"id": 0,
"batch": "batch@"
},
"course": [
{
"information": "test",
"id": "3",
"name": "course1"
}
],
"studentAddress": [
{
"additionalinfo": "test info",
"Address": [
{
"H.No": "1243",
"Name": "Temp Address",
"locality": "Temp locality",
"id":33
},
{
"H.No": "1243",
"Name": "Temp Address",
"locality": "Temp locality",
"id":33
},
{
"H.No": "1243",
"Name": "Temp Address",
"locality": "Temp locality",
"id":36
}
],
"verified": true,
}
]
}
Thanks.
谢谢。
采纳答案by srain
JSONArraymay be what you want.
JSONArray可能是你想要的。
String message;
JSONObject json = new JSONObject();
json.put("name", "student");
JSONArray array = new JSONArray();
JSONObject item = new JSONObject();
item.put("information", "test");
item.put("id", 3);
item.put("name", "course1");
array.add(item);
json.put("course", array);
message = json.toString();
// message
// {"course":[{"id":3,"information":"test","name":"course1"}],"name":"student"}
回答by Walter Palacios
In contrast to what the accepted answer proposes, the documentation says that for JSONArray()you must use put(value)no add(value).
与接受的答案建议相反，文档说对于JSONArray()你必须使用put(value)no add(value)。
https://developer.android.com/reference/org/json/JSONArray.html#put(java.lang.Object)
https://developer.android.com/reference/org/json/JSONArray.html#put(java.lang.Object)
(Android API 19-27. Kotlin 1.2.50)
（Android API 19-27。Kotlin 1.2.50）
