Java 如何获取 JSONObject 的元素？
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How to get elements of JSONObject?
提问by Muhammed Refaat
I have a JSONObjectthat contains some JSONObjectsas follows:
我有一个JSONObject包含JSONObjects以下内容的：
"statistics": {
"John": {
"Age": "22",
"status": "married"
},
"Ross": {
"Age": "34",
"status": "divorced"
}
}
Now all I know is the object name(statistics), and don't knowit's elements numberor it's elements names, So, is there's a way to parse that Object so that I can get it's elements and deal with it (ie. John, Ross) ?
现在我只知道对象名称（统计数据），不知道它的元素编号或元素名称，所以，有没有办法解析该对象，以便我可以获取它的元素并处理它（即约翰，罗斯）？
采纳答案by Emanuel S
JSONObject json = new JSONObject(yourdata);
String statistics = json.getString("statistics");
JSONObject name1 = json.getJSONObject("John");
String ageJohn = name1.getString("Age");
For getting those items in a dynamic way:
以动态方式获取这些项目：
JSONObject json = new JSONObject(yourdata);
String statistics = json.getString("statistics");
for (Iterator key=json.keys();key.hasNext();) {
JSONObject name = json.get(key.next());
//now name contains the firstname, and so on...
}
回答by Henry
You did not specify which library you intend to use to represent the JSON object. Usually there are methods to enumerate the properties of the object. For example:
您没有指定打算使用哪个库来表示 JSON 对象。通常有枚举对象属性的方法。例如：
org.json.JSONObject.keys()
returns an iterator of the String names in the object.
返回对象中字符串名称的迭代器。
