如何从html响应解析javascript数组(包含JSON对象作为元素）

How to parse a javascript array (containing JSON object as elements) from html response

本文关键字：对象 JSON 包含 元素 数组 html 响应 javascript      更新时间：2023-09-26

我正试图编写一个nodejs脚本，从mongodb中的多个集合中获取数据。之后，必须将完整的数据写入一个json响应中。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，然后将数组作为响应发送。但是在客户端脚本中，我无法读取数据。我写响应的代码（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;

我在响应中看到的数据是：

[
    [{
        "_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"]
    }]
]

如何编写代码从数组中获取json对象？

JSON对象中的数组有一个函数getJSONObject（int index），您可以使用for loop:循环所有对象

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