Question

我有以下json文件，正在阅读下面的代码。

{
    "17.216.30.177": {
        "agent": {
            "agent_ip": "17.216.30.177",
            "agent_cpu_type": "Intel Core i5",
            "agent_serial_num": "C02KQ00CFH46",
            "agent_hostname": "Beautiful-iMac.local",
            "agent_ram": "16 GB",
            "agent_processors": "4",
            "agent_system_type": "iMac14_2"
        },
        "devices": {
            "fedaa89792fdf9bcfe819cc9981bcda918dc1fa6": {
                "SerialNumber": "",
                "HardwareModel": "abc",
                "WiFiAddress": "abc",
                "BuildVersion": "abc",
                "kanzi": "315D0F",
                "current_state": 1,
                "UniqueChipID": "612806844428"
            },
            "47d46975e929d679f1c0713f7b060bf80390aeb9": {
                "SerialNumber": "",
                "HardwareModel": "lmn",
                "WiFiAddress": "lmn",
                "BuildVersion": "lmn",
                "kanzi": "315DF3",
                "current_state": 1,
                "UniqueChipID": "2572890213651"
            }
        },
        "last_alive_time": "2016-04-27 10:24:14"
    },
    "17.153.73.241": {
        "agent": {
            "agent_hostname": "aj-air.local",
            "agent_cpu_type": "Intel Core i5",
            "agent_processors": "2",
            "agent_ip": "17.244.49.99",
            "agent_serial_num": "C02M300KFY3V",
            "agent_system_type": "MacBookAir6_2",
            "agent_ram": "8 GB"
        },
        "devices": {
            "ccd457202545bef923e2d784f0aa30e12c4dfd43": {
                "HardwareModel": "pqr",
                "kanzi": "pqr",
                "SerialNumber": "",
                "current_state": 1,
                "UniqueChipID": "pqr",
                "WiFiAddress": "pqr",
                "BuildVersion": "pqr"
            }
        },
        "last_alive_time": "2016-04-27 10:30:08"
    }
}   


    function readTextFile(file, callback) {
            var rawFile = new XMLHttpRequest();
            rawFile.overrideMimeType("application/json");
            rawFile.open("GET", file, true);
            rawFile.onreadystatechange = function() {
            if (rawFile.readyState === 4 && rawFile.status == "200") {
                callback(rawFile.responseText);
            }
        }
        rawFile.send(null);
    }


    readTextFile("/resources/test.json", function(text){
        var data = JSON.parse(text);
        document.getElementById("demo").innerHTML = data[0]["agent"].agent_ip;
    });

data[0].17.216.30.177["agent"].agent_ip;

我该怎么做才能做到这一点？

如果它是data[0].xyz["agent"].agent_ip;，它运作良好，但因为ip期间，它不会

Answer 1

我能够将json文件读入对象但无法获取特定的键值。我从服务器那里得到这个文件因此不能有[]的数组，如果那个＆＃39 ;; s引起了问题。

这个问题是你像数组一样访问它，但你没有一个对象数组。因此，您可以将收到的文件转换为数组，也可以按原样获取对象并更改访问它们的方式。

您的主要问题是每个人都有一个唯一的密钥，您需要引用该密钥才能访问数据。如果您提前知道它们的键，则将它们用作关联数组。您可以通过＆＃39;来访问每个酒店。＆＃39;运营商。

data[key].agent.agent_ip

否则，您需要找到每个密钥并使用它来访问该对象。

    using Microsoft.Exchange.WebServices.Data;


        protected void EmailEws()
        {
            ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);

            service.Credentials = new WebCredentials("user", "password", "domain(local)");

            service.TraceEnabled = true;
            service.TraceFlags = TraceFlags.All;
// EWS service url.
            service.Url = new Uri("https://example.com/EWS/Exchange.asmx");

            EmailMessage email = new EmailMessage(service);

            email.ToRecipients.Add("a@b.com");

            email.Subject = "HelloWorld";          
            email.Body = new MessageBody("<p>This is the first email I've sent by using the EWS Managed API!</p>");
            // set Body before BodyType or an error is raised!                                                        
            email.Body.BodyType = BodyType.HTML;

            email.SendAndSaveCopy();
        }

我已经把它放在jsfiddle中了解如何用这种情况下的密钥访问对象。

参考文献：

Answer 2

        readTextFile("/resources/test.json", function(text){
            var data = JSON.parse(text);
            for (var key in data) {
                console.log("Agent IP-->", data[key].agent.agent_ip);
                console.log("Number of devices -->", Object.keys(data[key].devices).length);
                console.log("Total Number of devices -->", Object.keys(data[key].devices).length);
            }

这对我有用。

在Javascript中解析json并在html上创建表

2 个答案: