如何使用javascript将下表转换为JSON？

Question

如何在jquery / javascript中将下表转换为JSON字符串？

<table>
  <thead>
    <tr>
      <th>Column 1</th>
      <th>Column 2</th>
      <th>Column 3</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>A1</td>
      <td>A2</td>
      <td>A3</td>
    </tr>
    <tr>
      <td>B1</td>
      <td>B2</td>
      <td>B3</td>
    </tr>
    <tr>
      <td>C1</td>
      <td>C2</td>
      <td>C3</td>
    </tr>
  </tbody>
</table>

我想这样做，以便可以在POST请求或GET请求中使用的变量“ myjson”中获取JSON字符串：

{
  "myrows" : [
    {
      "Column 1" : "A1",
      "Column 2" : "A2",
      "Column 3" : "A3"
    },
    {
      "Column 1" : "B1",
      "Column 2" : "B2",
      "Column 3" : "B3"
    },
    {
      "Column 1" : "C1",
      "Column 2" : "C2",
      "Column 3" : "C3"
    }
  ]
}

做到这一点的最佳方法是什么？（注意：行的数量可能有所不同，我只想提取文本，而忽略表格内的其他标签）

Answer 1

更新： 有一个解决方案（下）上的jsfiddle的小幅提升叉。

您只需要遍历表的DOM即可读取它……这 甚至 还 没有接近优化，
但可以为您提供所需的结果。（jsFiddle）

// Loop through grabbing everything
var myRows = [];
var $headers = $("th");
var $rows = $("tbody tr").each(function(index) {
  $cells = $(this).find("td");
  myRows[index] = {};
  $cells.each(function(cellIndex) {
    myRows[index][$($headers[cellIndex]).html()] = $(this).html();
  });    
});

// Let's put this in the object like you want and convert to JSON (Note: jQuery will also do this for you on the Ajax request)
var myObj = {};
myObj.myrows = myRows;
alert(JSON.stringify(myObj));​

和输出…

{"myrows":[{"Column 1":"A1","Column 2":"A2","Column 3":"A3"},{"Column 1":"B1","Column 2":"B2","Column 3":"B3"},{"Column 1":"C1","Column 2":"C2","Column 3":"C3"}]}