如何从 json-array 获取内部数组值答案

【问题标题】：How to get inner array values from json-array如何从 json-array 获取内部数组值
【发布时间】：2015-06-16 05:14:15
【问题描述】：

这是 json 响应：

[
    {
        "currentvalue": [
            {
                "id": "13",
                "current_value": "0,1",
                "create_date": "2015-06-15 06:12:14",
                "status": "0",
                "modify_date": "0000-00-00 00:00:00",
                "entry_time": "",
                "indicator_id": "13",
                "member_id": "9"
            }
        ],
        "target": {
            "notification_time": "06:12:14",
            "id": "13",
            "health_selected_days": {
                "day": "3"
            },
            "point": "1",
            "indicator_name": "Test2",
            "create_date": "2015-06-15 06:12:14",
            "indicator_status": "0",
            "notification_type": "0",
            "modify_date": "2015-06-15 06:12:14",
            "indicator_measure": "0",
            "target_value": "0,1",
            "total_point": "0",
            "member_id": "9"
        }
    },
    {
        "currentvalue": [
            {
                "id": "12",
                "current_value": "0,1",
                "create_date": "2015-06-15 04:56:22",
                "status": "0",
                "modify_date": "0000-00-00 00:00:00",
                "entry_time": "",
                "indicator_id": "12",
                "member_id": "9"
            }
        ],
        "target": {
            "notification_time": "02:02:00",
            "id": "12",
            "health_selected_days": {
                "day": ""
            },
            "point": "1",
            "indicator_name": "Ashish",
            "create_date": "2015-06-15 04:56:22",
            "indicator_status": "0",
            "notification_type": "0",
            "modify_date": "2015-06-15 04:56:22",
            "indicator_measure": "0",
            "target_value": "0,1",
            "total_point": "0",
            "member_id": "9"
        }
    },
    {
        "currentvalue": [
            {
                "id": "11",
                "current_value": "0,1",
                "create_date": "2015-06-12 13:58:09",
                "status": "0",
                "modify_date": "0000-00-00 00:00:00",
                "entry_time": "",
                "indicator_id": "11",
                "member_id": "9"
            }
        ],
        "target": {
            "notification_time": "02:02:00",
            "id": "11",
            "health_selected_days": {
                "day": "1,2,3,4,5,6,7,"
            },
            "point": "123",
            "indicator_name": "A",
            "create_date": "2015-06-12 13:58:09",
            "indicator_status": "0",
            "notification_type": "0",
            "modify_date": "2015-06-12 13:58:09",
            "indicator_measure": "0",
            "target_value": "0,1",
            "total_point": "0",
            "member_id": "9"
        }
    }
]

如何从“目标”数组中获取指标名称值：

【问题讨论】：

向我们展示您的尝试。不鼓励简单地发布问题。
看看这个答案stackoverflow.com/questions/17673057/…

标签： java android json

【解决方案1】：

你可以这样做。

try {
                    JSONArray _jArrayMain = new JSONArray("YOURJSONSTRING");
                    for (int i = 0; i < _jArrayMain .length(); i++) {
                        JSONObject _jObj = _jArrayMain.getJSONObject(i);
                        JSONObject   _jObjTarget = _jObj.getJSONObject("target");
                        String _indicator_name = _jObjTarget.getString("indicator_name");
                        System.out.println("Indicator Name : " + _indicator_name);
                    }
                } catch (JSONException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

【讨论】：

【解决方案2】：

    JSONParser parser = new JSONParser();

    Object obj = parser.parse(new FileReader("your file path"));

    JSONObject jsonObject = (JSONObject) obj;

    String name = (String) jsonObject.get("indicator_name");
    System.out.println(name);

你可以这样试试。

【讨论】：

【解决方案3】：

for(int i=0; i<jsonArray.length(); i++)
{
    JSONObject object = jsonArray.getJSONObject(i);
    JSONObject target = object.getJSONObject("target");
    String indicator_name = target.getString("indicator_name");
}

target 不是一个数组，它实际上是一个 JSONObject。 this site 可能有助于使 json 数据看起来更清晰。

【讨论】：

【解决方案4】：

你可以使用下面的代码sn-p。

final JSONArray jsonArray = new JSONArray("JSON_STRING");
for (JSONObject jObject: jsoonArray) {
     final JSONObject   jsonTargetObject = jObject.optJSONObject("target");
     if(jsonTargetObject != NULL) {
     final String indicatorName = jsonTargetObject.optString("indicator_name", null);
     System.out.println("Indicator Name : " + indicatorName);
}

【讨论】：

【解决方案5】：

在你的例子中，

JsonArray responseJson = [
{
    "currentvalue": [
        {
            "id": "13",
            "current_value": "0,1",
            "create_date": "2015-06-15 06:12:14",
            "status": "0",
            "modify_date": "0000-00-00 00:00:00",
            "entry_time": "",
            "indicator_id": "13",
            "member_id": "9"
        }
    ],
    "target": {
        "notification_time": "06:12:14",
        "id": "13",
        "health_selected_days": {
            "day": "3"
        },
        "point": "1",
        "indicator_name": "Test2",
        "create_date": "2015-06-15 06:12:14",
        "indicator_status": "0",
        "notification_type": "0",
        "modify_date": "2015-06-15 06:12:14",
        "indicator_measure": "0",
        "target_value": "0,1",
        "total_point": "0",
        "member_id": "9"
    }
},
{
    "currentvalue": [
        {
            "id": "12",
            "current_value": "0,1",
            "create_date": "2015-06-15 04:56:22",
            "status": "0",
            "modify_date": "0000-00-00 00:00:00",
            "entry_time": "",
            "indicator_id": "12",
            "member_id": "9"
        }
    ],
    "target": {
        "notification_time": "02:02:00",
        "id": "12",
        "health_selected_days": {
            "day": ""
        },
        "point": "1",
        "indicator_name": "Ashish",
        "create_date": "2015-06-15 04:56:22",
        "indicator_status": "0",
        "notification_type": "0",
        "modify_date": "2015-06-15 04:56:22",
        "indicator_measure": "0",
        "target_value": "0,1",
        "total_point": "0",
        "member_id": "9"
    }
},
{
    "currentvalue": [
        {
            "id": "11",
            "current_value": "0,1",
            "create_date": "2015-06-12 13:58:09",
            "status": "0",
            "modify_date": "0000-00-00 00:00:00",
            "entry_time": "",
            "indicator_id": "11",
            "member_id": "9"
        }
    ],
    "target": {
        "notification_time": "02:02:00",
        "id": "11",
        "health_selected_days": {
            "day": "1,2,3,4,5,6,7,"
        },
        "point": "123",
        "indicator_name": "A",
        "create_date": "2015-06-12 13:58:09",
        "indicator_status": "0",
        "notification_type": "0",
        "modify_date": "2015-06-12 13:58:09",
        "indicator_measure": "0",
        "target_value": "0,1",
        "total_point": "0",
        "member_id": "9"
    }
}];

for(int i=0;i<responseJson.length();i++)
{
    JsonObject currentJsonObj = responseJson.optJsonObject(i);
    JsonArray currentJsonA = responseJson.optJsonArray("currentvalue");
    for(int j=0;j<currentJsonA.length();j++)
    {
        JsonObject innerObj = currentJsonA.optJsonObject(j);
        String id = innerObj.optString("id");
        String currentValue = innerObj.optString("current_value");
    }
}

【讨论】：