如何在javascript中获取json密钥和值？

Question

我正在返回一个json，如下所示

{"name": "", "skills": "", "jobtitel": "Entwickler", "res_linkedin": "GwebSearch"}

我正在尝试获取每个元素键和值：

..
}).done(function(data){
    alert(data['jobtitel']);
});

我正在警惕undefined。为什么？我试过data.jobtitel，我试过循环但没有成功..

Answer 1

//By using jquery json parser

var obj = $.parseJSON('{"name": "", "skills": "", "jobtitel": "Entwickler", "res_linkedin": "GwebSearch"}');
alert(obj['jobtitel']);

//By using javasript json parser
var t = JSON.parse('{"name": "", "skills": "", "jobtitel": "Entwickler", "res_linkedin": "GwebSearch"}');
alert(t['jobtitel'])

Check this jsfiddle

  

从 jQuery 3.0 开始，不推荐使用$ .parseJSON。解析JSON字符串使用   而是原生的JSON.parse方法。

     

来源：http://api.jquery.com/jquery.parsejson/

Answer 2

您使用Json

解析了JSON.parse()字符串

..
}).done(function(data){
    obj = JSON.parse(data);
    alert(obj.jobtitel);
});

Answer 3

var data = {"name": "", "skills": "", "jobtitel": "Entwickler", "res_linkedin": "GwebSearch"}

var parsedData = JSON.parse(data);
alert(parsedData.name);
alert(parsedData.skills);
alert(parsedData.jobtitel);
alert(parsedData.res_linkedin);

Answer 4

http://jsfiddle.net/v8aWF/

制作了一个小提琴。检查一下

(function() {
    var oJson = {
        "name": "", 
        "skills": "", 
        "jobtitle": "Entwickler", 
        "res_linkedin": "GwebSearch"
    }
    alert(oJson.jobtitle);
})();

Answer 5

一种简单的方法，而不是使用JSON.parse

 success: function(response){
     var resdata = response;
     alert(resdata['name']);
}

Answer 6

data似乎不包含您认为的内容-进行检查。

let data={"name": "", "skills": "", "jobtitel": "Entwickler", "res_linkedin": "GwebSearch"};

console.log( data["jobtitel"] );
console.log( data.jobtitel );

Answer 7

您可以使用以下解决方案在JavaScript中获取JSON密钥和值：

var dt = JSON.stringify(data).replace('[', '').replace(']', '');
if (dt) {
  var result = jQuery.parseJSON(dt);
  var val = result.YOUR_OBJECT_NAME;
}

Answer 8

获取密钥

package main

import (
    config2 "ab-proxy/config"
    "bytes"
    "fmt"
    "io/ioutil"
    "net/http"
    "net/http/httputil"
    "net/url"
    "strconv"
    "strings"
)

var config config2.ProxyConfig
var reverseProxy *httputil.ReverseProxy
var tests config2.Tests

func overwriteCookie(req *http.Request, cookie *http.Cookie) {
    // omitted for brevity, will replace a cookie header, instead of adding a second value
}

func parseRequestCookiesToAssignedTests(req *http.Request) map[string]string {
    // omitted for brevity, builds a map where the key is the identifier of the test, the value the assigned variant
}

func renderCookieForAssignedTests(assignedTests map[string]string) string {
    // omitted for brevity, builds a cookie string
}

func main () {
    var err error

    if  config, err = config2.LoadConfig(); err != nil {
        fmt.Println(err)

        return
    }

    if tests, err = config2.LoadTests(); err != nil {
        fmt.Println(err)

        return
    }

    upstreamUrl, _ := url.Parse("0.0.0.0:80")

    reverseProxy = httputil.NewSingleHostReverseProxy(upstreamUrl)
    reverseProxy.ModifyResponse = modifyResponse

    http.HandleFunc("/", handleRequest)

    if err := http.ListenAndServe("0.0.0.0:80", nil); err != nil {
        fmt.Println("Could not start proxy")
    }
}

func handleRequest(res http.ResponseWriter, req *http.Request) {
    assigned := parseRequestCookiesToAssignedTests(req)

    newCookies := make(map[string]string)

    for _, test := range tests.Entries {
        val, ok := assigned[test.Identifier]

        if ok {
            newCookies[test.Identifier] = val
        } else {
            newCookies[test.Identifier] = "not-assigned-yet" // this will be replaced by random variation assignment
        }
    }

    testCookie := http.Cookie{Name: config.Cookie.Name, Value: renderCookieForAssignedTests(newCookies)}

    // Add cookie to request to be sent to upstream
    overwriteCookie(req, &testCookie)

    // Add cookie to response to be returned to client
    http.SetCookie(res, &testCookie)

    reverseProxy.ServeHTTP(res, req)
}

func modifyResponse (response *http.Response) error {
    body, err := ioutil.ReadAll(response.Body)

    if err != nil {
        return  err
    }

    err = response.Body.Close()

    if err != nil {
        return err
    }

    response.Body = ioutil.NopCloser(bytes.NewReader(body))
    response.ContentLength = int64(len(body))
    response.Header.Set("Content-Length", strconv.Itoa(len(body)))

    return nil
}

为了获得价值。

var a = {"a":"1","b":"2"};
var keys = []
for(var k in a){
  keys.push(k)
}