Question

现在几个小时我一直疯狂地尝试使用JSON.parse从外部获取和显示json数据，但是下面有这个错误

未捕获的SyntaxError：位于0的JSON中的意外标记d 在JSON.parse（）在index.html：10

到目前为止，这是我的代码和努力。有人可以帮我解决这个问题。我会很感激

 var test = JSON.parse ('data.json');
    console.log(test);

alert(test);





/*
var ourRequest = new XMLHttpRequest();
ourRequest.open('GET', 'data.json');

ourRequest.onload = function(){
    var ourData  = JSON.parse(ourRequest.responseText);
    console.log(ourData);
 console.log(ourData[0]);
alert(ourData);
};
ourRequest.send();
*/


</script>

data.json

{
        name: "Sample Test",
        description: "This is a sample test paper to demonstrate the ReactJS UI design by components.",
        passCutoff: 0.33,       
        applyNegativeMarking: false,
        time: 1,
        questions: [
            {
            no: "1",
            qtext:"California is in which part of USA?",
            options:[
                {text:"East"},
                {text:"Mid"},
                {text:"West"},
                {text:"South"}
            ],
            ans:"West",
            marks: 3
        },
        {
            no: "2",
            qtext:"Who is Prime Minister of India?",
            options:[
                {text:"Sonia Gandhi"},
                {text:"Narendra Modi"},
                {text:"Manmohan Singh"},
                {text:"Rahul Gandhi"}
            ],
            ans:"Narendra Modi",
            marks: 2
        },
        {
            no: "3",
            qtext:"Which of the following is most popular Search Engine Company?",
            options:[
                {text:"Microsoft"},
                {text:"Facebook"},
                {text:"Google"},
                {text:"Yahoo"}
            ],
            ans:"Google",
            marks: 1
        },
        ]
    }

Answer 1

$ .getJSON是异步的，所以你应该这样做：

$.getJSON("data.json", function(json) {
    console.log(json); // this will show the info it in firebug console
});

Answer 2

以下是一个可以帮助您的示例：

function loadJSON() {
  var http = new XMLHttpRequest();
  http.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
        var data=JSON.stringify(this.responseText);
        data=JSON.parse(data);
        console.log(data);
    }
  };
  http.open("GET", "data.json", true);
  http.send();
}
loadJSON()

未捕获的SyntaxError：JSON.parse（<anonymous>）位置0的JSON中出现意外的标记d

2 个答案: