如何解析JSON并将其值转换为数组？ [英] How to parse a JSON and turn its values into an Array?

问题描述

public static void parseProfilesJson(String the_json){
       try {
            JSONObject myjson = new JSONObject(the_json);

            JSONArray nameArray = myjson.names();
            JSONArray valArray = myjson.toJSONArray(nameArray);
            for(int i=0;i<valArray.length();i++)
            {
                String p = nameArray.getString(i) + "," + ValArray.getString(i);
                Log.i("p",p);
            }       

        } catch (JSONException e) {
                e.printStackTrace();
        }
    }

如您所见，此示例代码将打印出来JSON的 KEY ，然后是JSONS的 VALUES 。

As you can see, this sample code will print out the KEY of the JSONs, followed by the VALUES of the JSONS.

它会打印个人资料，约翰如果json是这样的：

It would print profiles, john if the json was like this:

{'profiles':'john'}

这很酷。这很好，因为我可以使用这些变量。但是，如果JSON是这样的话：

That's cool. That's fine, as I can work with those variables. However, what if the JSON was like this:

{'profiles': [{'name':'john', 'age': 44}, {'name':'Alex','age':11}]}

在这种情况下，整个值将是数组。基本上，我只想抓住那个数组（在这种情况下是值）......并将其转换为JAVA可以使用的实际数组。我怎样才能做到这一点？谢谢。

In this case, the entire value would be the array. Basically, I just want to grab that array (which is the "value" in this case)...and turn it into an actual array that JAVA could use. How can I do that? Thanks.

推荐答案

为您的例子：

{'profiles': [{'name':'john', 'age': 44}, {'name':'Alex','age':11}]}

你必须做一些这样的事情：

you will have to do something of this effect:

JSONObject myjson = new JSONObject(the_json);
JSONArray the_json_array = myjson.getJSONArray("profiles");

这将返回数组对象。

然后迭代如下：

    int size = the_json_array.length();
    ArrayList<JSONObject> arrays = new ArrayList<JSONObject>();
    for (int i = 0; i < size; i++) {
        JSONObject another_json_object = the_json_array.getJSONObject(i);
            //Blah blah blah...
            arrays.add(another_json_object);
    }

//Finally
JSONObject[] jsons = new JSONObject[arrays.size()];
arrays.toArray(jsons);

//The end...

你必须确定是否数据是一个数组（只需检查 charAt（0）以 [字符）开头。

You will have to determine if the data is an array (simply checking that charAt(0) starts with [ character).

希望这有帮助。

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