javascript - JavaScript 中的数组 JSON

Question

我的 json 是:

[
   {
      "_id":{
         "time":1381823399000,
         "new":false,
         "timeSecond":1381823399,
         "machine":263168773,
         "inc":-649466399
      },
      "asset":"RO2550AS1",
      "Salt Rejection":"90%",
      "Salt Passage":"10%",
      "Recovery":"59%",
      "Concentration Factor":"2.43",
      "status":"critical",
      "Flow Alarm":"High Flow"
   },
   [
      {
         "Estimated Cost":"USD 15",
         "AssetName":"RO2500AS1",
         "Description":"Pump Maintenance",
         "Index":"1",
         "Type":"Service",
         "DeadLine":"13 November 2013"
      },
      {
         "Estimated Cost":"USD 35",
         "AssetName":"RO2500AS1",
         "Description":"Heat Sensor",
         "Index":"2",
         "Type":"Replacement",
         "DeadLine":"26 November 2013"
      },
      {
         "Estimated Cost":"USD 35",
         "AssetName":"RO2550AS1",
         "Description":"Heat Sensor",
         "Index":"3",
         "Type":"Replacement",
         "DeadLine":"26 November 2013"
      },
      {
         "Estimated Cost":"USD 15",
         "AssetName":"RO2550AS1",
         "Description":"Pump Maintenance",
         "Index":"4",
         "Type":"Service",
         "DeadLine":"13 November 2013"
      },
      {
         "Estimated Cost":"USD 15",
         "AssetName":"RO3000AS1",
         "Description":"Pump Maintenance",
         "Index":"5",
         "Type":"Service",
         "DeadLine":"13 November 2013"
      },
      {
         "Estimated Cost":"USD 35",
         "AssetName":"RO3000AS1",
         "Description":"Heat Sensor",
         "Index":"6",
         "Type":"Replacement",
         "DeadLine":"26 November 2013"
      }
   ]
]

我需要在 JavaScript 中访问它。

以下代码不起作用:

var jsonobjstr = JSON.parse(jsonOutput);
alert ("asset: "+jsonobjstr.asset);

Answer 1

因为整个 JSON 包含在一个数组中。

alert("asset: "+jsonobjstr[0].asset);

http://jsfiddle.net/ExplosionPIlls/yHj5X/2/