如何从 html 响应中解析 javascript 数组（包含 JSON 对象作为元素）

Question

我正在尝试编写一个从 mongodb 中的多个集合中获取数据的 nodejs 脚本。之后，必须将完整的数据写入一个 json 响应。 目前我采用的方法是将每个集合中的 json 数据推送到一个数组中，然后将该数组作为响应发送。但在客户端脚本中我无法读取数据。 我为写响应而编写的代码（Router.js）是：

appTableProdSchema.js

var conn = require('mongoose');

module.exports = conn.model('AppTableProd', {
    snapShotTime : String,
    nfs: Array,    
    hive: Array,
    beeline: Array,
    hs2: Array,
    beeswax: Array,
    df: Array 
});

hs2_10010Schema.js

var conn = require('mongoose');

module.exports = conn.model('hiveserver2_10010', {
    snapShotTime : String,
    hs2: Array
});

Router.js

var moment = require('moment'); //add moment

var records;
//mongoose schema
var appTableProdSchema = require("./appTableProdSchema.js");
var hs2 = require("./hs2_10010Schema.js");

router.get('/getHealthReport', function(req, res) {
    // Return the most recent document
    var fullData = [];
    records = appTableProdSchema
                   .find()
                   .sort({'_id': -1})
                   .limit(1)
                   .exec(function(err, data) {
                        if (err) return res.sendStatus(500);
                        fullData.push(data);
                   });


    records = hs2
               .find()
               .sort({'_id': -1})
               .limit(1)
               .exec(function(err, data) {
                    if (err) return res.sendStatus(500);
                    fullData.push(data);
                    res.json(fullData);
               }); 

    }); 

module.exports = router;

我在 Response 中看到的数据是：

[
    [{
        "_id":"56f178cf64dadf6411ccc3fa",
        "snapShotTime":"2016-03-22-16:50:05",
        "__v":0,
        "df":["data_node_1","data_node_2","data_node_3","data_node_4","data_node_5","data_node_13","data_node_10","data_node_9","data_node_6","data_node_8","data_node_12","data_node_7","data_node_11","ebdp-ch2-d146p.sys.comcast.net","ebdp-ch2-d192p.sys.comcast.net"],
        "beeswax":["data_node_10","data_node_1","data_node_11","data_node_13","data_node_4","data_node_2","data_node_3","data_node_6","data_node_12","data_node_5","data_node_7","data_node_8"],
        "hs2":["data_node_7","data_node_1","data_node_10","data_node_13","data_node_4","data_node_3","data_node_2","data_node_9","data_node_11","data_node_5","data_node_8","data_node_6","data_node_12"],
        "beeline":["data_node_10","data_node_1","data_node_11","data_node_13","data_node_4","data_node_2","data_node_3","data_node_6","data_node_12","data_node_5","data_node_7","data_node_8"],
        "hive":["data_node_4","data_node_2","data_node_3","data_node_7","data_node_8","data_node_5","data_node_1","data_node_6","data_node_12","data_node_11","data_node_13","data_node_9","data_node_10"],
        "nfs":["data_node_7","data_node_4","data_node_1","data_node_3","data_node_10","data_node_5","data_node_13","data_node_9","data_node_11","data_node_6","data_node_8","data_node_12","data_node_2"]
        }],

    [{
        "_id":"56f178cf64dadf6411ccc3fb",
        "snapShotTime":"2016-03-22 16:50:05",
        "__v":0,
        "hs2":["data_node_9"]
    }]
]

我如何编码以从数组中获取 json 对象？

Answer 1

JSON 对象中的数组有一个函数 getJSONObject(int index)，你可以使用 for-loop 循环遍历所有对象：

var array;
for(int n = 0; n < array.length(); n++)
   {
       var object = array.getJSONObject(n);
       // do some stuff....
   }