米利亚长度 JSONObject JSON

我读到了下面 XML 在 java 并转换B.

JSONObject

[

org.json.JSONObject

].
并添加元数据并返回 JSON.

问题

:

JSONObject jsonObj = service.getMyData//;

// 自定义方法和呼叫

int count = jsonObj.length//;

// length is 1

How do I take the correct count from this jsonObj? . The correct count I am referring to is 2 in this case. [2 books]

What I tried?

/1/

System.out.println/jsonObj.length///;

// prints 1

API says: length//
Get the number of keys stored in the JSONObject.

/2/ Since number of keys is returned as 1, there is no point on trying the below one, still I tried
and got the error of

org.json.JSONException: JSONObject["User"] not found.

System.out.println/jsonObj.getJSONArray/"User"/.length///;

/3/ 如果我试试 'Users' , IE：

jsonObj.getJSONArray/"Users"/.length//

, 他会说

JSONObject["Users"] is not a JSONArray

.

/4/

JSONObject jsonObj = service.getMyData//;

 JSONObject jUsers = jsonObj.getJSONObject/"Users"/;

 JSONObject jUser = jUsers.getJSONObject/"User"/;

 System.out.println/jUser.length///;

错误：

org.json.JSONException: JSONObject["User"] is not a JSONObject.

XML

:

<users>

<user>

<name>Unni</name>

<books>

<book>book1</book>

<book>book2</book>

<book>book3</book>

</books>

</user>

<user>

<name>Ammu</name>

<books>

<book>book1</book>

<book>book2</book>

<book>book4</book>

</books>

</user>

</users>

JSON

:

{

 "Users": {

 "User": [

 {

 "Name": "Unni",

 "Books": {

 "Book": [

 "book1",

 "book2",

 "book3"

 ]

 }

 },

 {

 "Name": "Ammu",

 "Books": {

 "Book": [

 "book1",

 "book2",

 "book4"

 ]

 }

 }

 ]

 }

}