难以将JSON解析为HTML,结果未定义?

时间:2013-04-01 05:16:32

标签: javascript html json

我正在尝试使用getJSON和YQL解析YAHOO数据

连接运行良好,我检索我可以看到的数据并登录到控制台,但我无法将数据打印到我正在使用的JSP页面中。我用过这里接受的答案:

http://jsbin.com/umuri5/1/edit

收效甚微。这是我的JSP:

<%@page import="p.build.classes.p.*"%>

<!DOCTYPE JSP>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 
<title>untitled</title>
<style type="text/css">
    body { text-align: center; }
</style>
</head>
<body onLoad="gova();">

<div id="container">

</div>
<table id="userdata" border="1">
    <thead>
        <th>Change</th>
    </thead>
    <tbody></tbody>
</table>

<script id="userTemplate" type="text/x-jquery-tmpl">
    <tr>
        <td>${Change}</td>
    </tr>
</script>

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"    type="text/javascript" charset="utf-8"></script>   
<script src="https://raw.github.com/jquery/jquery-tmpl/master/jquery.tmpl.min.js" type="text/javascript" charset="utf-8"></script> 
<script src="scripts/script.js"></script>
<script type="text/javascript">
function gova() {
requestCrossDomainJSON(
    'yahoo.finance.quote',
    function(results) {
        var i, t = $('#userTemplate'), tbody = $('#userdata tbody');
      // console.log(data.query.results);

        for (var i = 0; i < results.userdata.length; i++) {
            t.tmpl(results.userdata[i]).appendTo(tbody);
        }
    }
);
return false;
}
</script>
</body>
</html>

这是我的脚本script.js:

function requestCrossDomainJSON( site, callback ) {  


  if ( !site ) {  
    alert('No site was passed.');  
    return false;  
  }  


var yql = 'http://query.yahooapis.com/v1/public/yql?q=select%20Change%20from%20' + site + '%20where%20symbol%20in%20(%22YHOO%22)&format=json&diagnostics=true&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys&callback=?';  

// Request that YSQL string, and run a callback function.  
// Pass a defined function to prevent cache-busting.

function cbfunc(data) {
    console.log(data);
      // If we have something to work with...
      if ( ! data.error && data.query.results) {
          // If the user passed a callback, and it
          // is a function, call it, and send through the data var.
          if ( typeof callback === 'function') {
              callback(data.query.results.json);

          }

      }
      // Else, Maybe we requested a site that doesn't exist, and nothing returned.
      else throw new Error('Nothing returned from getJSON.');

  }
  // Request that YQL string, and run a callback function.
  // Pass a defined function to prevent cache-busting.
  $.getJSON( yql, cbfunc );

 //    console.log(data.query.results);


 };

错误发生在以下行:

        for (var i = 0; i < results.userdata.length; i++) {
            t.tmpl(results.userdata[i]).appendTo(tbody);
        }

控制台说它无法读取未定义的属性userdata。因为JQuery模板被折旧了,我应该使用更好的方法将这些数据放到我的页面中吗?如果这仍然是我遇到的问题的有效解决方案,如果它在未定义的情况下我应如何引用被调用的JSON的结果功能提供。我也试过用HTML文件代替JSP。

提前谢谢。

1 个答案:

答案 0 :(得分:1)

来自the URL you're making the request to的回复的results部分返回:

results: {
     quote: {
          Change: "-0.061"
     }
}

你期待这个吗?

如果是这样,您需要抓取data.query.results['quote']['Change']data.query.results.quote.Change,而不是尝试将data.query.results.json传递给回调,然后查看results.userdata