如何摆脱JSON字符串的外部参数？

Question

我有一个看起来像这样的API调用返回的json字符串

{"study":{"moleculeDescription":"RONTALIZUMAB","protocolTitle":"IMM","protocolNumber":"GA00806","studyName":"Interferon alpha in SLE Phase II LCM Option","therapeuticArea":"INFLAMMATORY,AUTOIMMUNE&BONE","startDate":"2009-03-25","endDate":"2013-08-22"}}

我希望能够使用类似下面的内容来循环遍历json字符串并将值分配给页面上的输入字段。

function doStuff() {
        var myTest = document.getElementById('{!$Component.jsonStr}');

        for( k in myTest ){
            document.getElementById(k).value = myTest[k];
            }
        }

但是，只有当我的json字符串（var myTest）看起来像这样时，它才起作用（见下文，没有外部{“ study”：}参数）

{"moleculeDescription":"RONTALIZUMAB","protocolTitle":"IMM","protocolNumber":"GA00806","studyName":"Interferon alpha in SLE Phase II LCM Option","therapeuticArea":"INFLAMMATORY,AUTOIMMUNE&BONE","startDate":"2009-03-25","endDate":"2013-08-22"}

有谁知道我可以消除我的json字符串的外部部分，以便我可以使用内部部分？ 还是有更好的方法，例如修改for语句？ 感谢您的任何帮助，如果这是一个愚蠢的问题，对不起，我是新手。

Answer 1

var x = {"study":{"moleculeDescription":"RONTALIZUMAB","protocolTitle":"IMM","protocolNumber":"GA00806","studyName":"Interferon alpha in SLE Phase II LCM Option","therapeuticArea":"INFLAMMATORY,AUTOIMMUNE&BONE","startDate":"2009-03-25","endDate":"2013-08-22"}};

var y = x.study;

y将是必需的var

更好的事情是

for( k in myTest.study )
{
     document.getElementById(k).value = myTest[k];
}

Answer 2

您可以执行以下操作

for (var key in myTest) {
  if (myTest.hasOwnProperty(key)) {
    var localSet = myTest[key];
    // .. here goes your code to iterate through inner object
  }
}