htmlKit = {
  _tags: [], html: [], 
  _createAttrs: function (attrs) {
    var attrStr = [];
    for (var key in attrs) {
      if (!attrs.hasOwnProperty(key)) continue;
      attrStr.push(key + "=" + attrs[key] + "")
    }
    return attrStr.join(" ")
  }, 
  _createTag: function (tag, attrs, isStart) {
    if (isStart) {
      return "<" + tag + " " + this._createAttrs(attrs) + ">"
    } else {
      return "</" + tag + ">"
    }
  }, 
  start: function (tag, attrs) {
    this._tags.push(tag);
    this.html.push(this._createTag(tag, attrs, true))
  }, 
  end: function () {
    this.html.push(this._createTag(this._tags.pop(), null, false))
  }, 
  tag: function (tag, attr, text) {
    this.html.push(this._createTag(tag, attr, true) + text + this._createTag(tag, null, false))
  }, 
  create: function () {
    return this.html.join("")
  }
};

function json2Html(data) {
  var hk = htmlKit;
  hk.start("table", {"cellpadding": "10", "border": "1"});
  hk.start("thead");
  hk.start("tr");
  data["heads"].forEach(function (head) {
    hk.tag("th", {"bgcolor": "AntiqueWhite"}, head)
  });
  hk.end();
  hk.end();
  hk.start("tbody");
  data["data"].forEach(function (dataList, i) {
    dataList.forEach(function (_data) {
      hk.start("tr");
      data["dataKeys"][i].forEach(function (key) {
        var rowsAndCol = key.split(":");
        if (rowsAndCol.length === 1) {
          hk.tag("td", null, _data[rowsAndCol[0]])
        } else if (rowsAndCol.length === 3) {
          hk.tag("td", {"rowspan": rowsAndCol[0], "colspan": rowsAndCol[1]}, _data[rowsAndCol[2]])
        }
      });
      hk.end()
    })
  });
  hk.end();
  hk.end();
  return hk.create()
}

var data = [
  {
    "chinese": 80,
    "mathematics": 89,
    "english": 90
  }
];

var total = 0;
data.forEach(function (value) {
  for (key in value) {
    total += value[key];
  }
});

var htmlMetadata = {
  "heads": ["语文", "数学", "英语"],
  "dataKeys": [["chinese", "mathematics", "english"], ["text","1:2:total"]], // rowspan:colspan:value
  "data": [data, [{"text": "合计","total": total}]]
};

var html = json2Html(htmlMetadata);

console.info(html);
输出结果（结果为了好看，格式化了）：

<table cellpadding=10 border=1>
  <thead>
  <tr>
    <th bgcolor=AntiqueWhite>语文</th>
    <th bgcolor=AntiqueWhite>数学</th>
    <th bgcolor=AntiqueWhite>英语</th>
  </tr>
  </thead>
  <tbody>
  <tr>
    <td>80</td>
    <td>89</td>
    <td>90</td>
  </tr>
  <tr>
    <td>合计</td>
    <td rowspan=1 colspan=2>259</td>
  </tr>
  </tbody>
</table>