从远程服务读取json数据并打印特定元素

Question

嗨，我有来自服务的这个json对象数据

{
    "Result": [
        {
            "Status": {
                "StatusCode": 200,
                "Text": "Successful"
            }
        },
        {
            "ListByPI": {
                "ORCA_ID": "25746",
                "ProtocolID": "20140476HU",
                "PIName": "DeFronzo"
            }
        },
        {
            "ListByPI": {
                "ORCA_ID": "21273",
                "ProtocolID": "20120202HU",
                "PIName": "DeFronzo"
            }
        }
    ]
}

如何获取ORCA_ID，ProtocolID和PIName的值？

Answer 1

在PHP中，您可以使用json_decode并像这样提取

<?php
$contents = '{
"Result":[
{
"Status":{
"StatusCode":200,
"Text":"Successful"
}
},
{
"ListByPI":{
"ORCA_ID":"25746",
"ProtocolID":"20140476HU",
"PIName":"DeFronzo"
}
},
{
"ListByPI":{
"ORCA_ID":"21273",
"ProtocolID":"20120202HU",
"PIName":"DeFronzo"
}
}
]
}';

$json = json_decode($contents, true); 



echo "In Result  first ORCA_ID is ".$json['Result'][1]['ListByPI']['ORCA_ID']."<br>"; //Here result is an array...So Indexs should be mentioned... then string name

      ?>

输出

In Result, first ORCA_ID is 25746

Answer 2

如果要使用java解析它，则可以使用以下命令：

String json = "{\"Result\":[{\"Status\":{\"StatusCode\":200,\"Text\":\"Successful\"}},{\"ListByPI\":{\"ORCA_ID\":\"25746\",\"ProtocolID\":\"20140476HU\",\"PIName\":\"DeFronzo\"}},{\"ListByPI\":{\"ORCA_ID\":\"21273\",\"ProtocolID\":\"20120202HU\",\"PIName\":\"DeFronzo\"}}]}";

JSONObject jsonObject = new JSONObject(json);

JSONArray jsonArray = jsonObject.getJSONArray("Result");

for (int i = 1; i < jsonArray.length(); i++) {
    JSONObject object = jsonArray.getJSONObject(i).getJSONObject("ListByPI");
    System.out.println("ORCA_ID = " + object.getString("ORCA_ID") + " --- ProtocolID = " + object.getString("ProtocolID"));
}

Answer 3

您可以使用for并循环浏览所需的元素，如get keys of json-object in JavaScript中所示：

for (k in s.Result[1].ListByPI) {
    document.write(k);   
}

看到它的实际效果：

var s = {
    "Result": [
        {
            "Status": {
                "StatusCode": 200,
                "Text": "Successful"
            }
        },
        {
            "ListByPI": {
                "ORCA_ID": "25746",
                "ProtocolID": "20140476HU",
                "PIName": "DeFronzo"
            }
        },
        {
            "ListByPI": {
                "ORCA_ID": "21273",
                "ProtocolID": "20120202HU",
                "PIName": "DeFronzo"
            }
        }
    ]
};

for (k in s.Result[1].ListByPI) {
    document.write(k);   
}

同样在JSFiddle。

---

更新

如果您不想指定Result[ +数字+ ]，那么您可以像这样循环播放它们：

for (i in s.Result) {
   document.write('we are in id);
   for (k in s.Result[i].ListByPI) {
       document.write(k);   
   }
}

看到它的实际效果：

var s = {
    "Result": [
        {
            "Status": {
                "StatusCode": 200,
                "Text": "Successful"
            }
        },
        {
            "ListByPI": {
                "ORCA_ID": "25746",
                "ProtocolID": "20140476HU",
                "PIName": "DeFronzo"
            }
        },
        {
            "ListByPI": {
                "ORCA_ID": "21273",
                "ProtocolID": "20120202HU",
                "PIName": "DeFronzo"
            }
        }
    ]
};

for (i in s.Result) {
   document.write('we are in id);
   for (k in s.Result[i].ListByPI) {
       document.write(k);   
   }
}

Answer 4

You can write this:

 var temp = {"Result": [
               { "Status": { "StatusCode": 200, "Text": "Successful" } },
               { "ListByPI": { "ORCA_ID": "25746", "ProtocolID": "20140476HU", "PIName": "DeFronzo" } },
               { "ListByPI": { "ORCA_ID": "21273", "ProtocolID": "20120202HU", "PIName": "DeFronzo" } }]
                };
                temp["Result"][0].Status.StatusCode;
                temp["Result"][0].Status.Text;
                temp["Result"][1].ListByPI.ORCA_ID;
                temp["Result"][1].ListByPI.ProtocolID;
                temp["Result"][1].ListByPI.PIName;
                temp["Result"][2].ListByPI.ORCA_ID;
                temp["Result"][2].ListByPI.ProtocolID;
                temp["Result"][2].ListByPI.PIName;
            }