将 HTML Table 转换为 Json 文件

Question

是否可以像这样将 HTML table 转换为 json:

姓名性别年龄

约翰中号 18

麦克中号 19

Json:

     {"Values" : {

    "1" : {
                "name": "John",
                "Gender": "M",
                "Age": "18"
            },

    "2": {
                "name": "Mike",
                "Gender": "M",
                "Age": "19"
            },
}}

我已经有了这个代码：

    (function() {
    var jsonArr = [];
    var obj = {};
    var thNum = document.getElementsByTagName('th').length;
    var arrLength = document.getElementsByTagName('td').length;

    for(i = 0; i<arrLength;i++){
        if(i%thNum==0){
            obj = {};
        }
        var head = document.getElementsByTagName('th')[i%thNum].innerHTML;
        var content = document.getElementsByTagName('td')[i].innerHTML;
        obj[head] = content;
        if(i%thNum==0){
            jsonArr.push(obj);
        }   
    }           
    document.write("<br>"+JSON.stringify(jsonArr));
})();

脚本转换为：

    <!DOCTYPE html>
<TABLE border="3" rules="all" bgcolor="#E7E7E7" cellpadding="1" cellspacing="1">
<TR>
<TH align=center><font size="3" face="Arial">Date</font></TH>
<TH align=center><font size="3" face="Arial"><B>Teacher</B></font></TH>
<TH align=center><font size="3" face="Arial">?</font></TH>
<TH align=center><font size="3" face="Arial">Hour</font></TH>
<TH align=center><font size="3" face="Arial">Subject</font></TH>
<TH align=center><font size="3" face="Arial">Class</font></TH>
<TH align=center><font size="3" face="Arial">Room</font></TH>
<TH align=center><font size="3" face="Arial">(Teacher)</font></TH>
<TH align=center><font size="3" face="Arial">(Room)</font></TH>
<TH align=center><font size="3" face="Arial">XYY</font></TH>
<TH align=center><font size="3" face="Arial"><B>Information</B></font></TH>
<TH align=center><font size="3" face="Arial">(Le.) nach</font></TH>
</TR>
<TR><TD align=center><font size="3" face="Arial">24.9.</font></TD>
<TD align=center><font size="3" face="Arial"><B><strike>Dohe</strike></B></font></TD>
<TD align=center><font size="3" face="Arial">Free</font></TD>
<TD align=center><font size="3" face="Arial">1</font></TD>
<TD align=center><font size="3" face="Arial"><strike>Math</strike></font> </TD>
<TD align=center><font size="3" face="Arial">(9)</font> </TD>
<TD align=center><font size="3" face="Arial">---</font> </TD>
<TD align=center><font size="3" face="Arial"><strike>Dohe</strike></font></TD>
<TD align=center><font size="3" face="Arial">A001</font></TD>
<TD align=center>&nbsp;</TD>
<TD align=center>&nbsp;</TD>
<TD align=center><font size="3" face="Arial">Free.</font></TD>
</TR>
</TABLE>
<script>
(function() {
    var jsonArr = [];
    var obj = {};
    var thNum = document.getElementsByTagName('th').length;
    var arrLength = document.getElementsByTagName('td').length;

    for(i = 0; i < arrLength; i++){
        if(i%thNum === 0){
            obj = {};
        }
        var head = document.getElementsByTagName('th')[i%thNum].innerHTML;
        var content = document.getElementsByTagName('td')[i].innerHTML;
        obj[head] = content;
        if(i%thNum === 0){
            jsonArr.push(obj);
        }   
    }           
    document.write("<br>"+JSON.stringify(jsonArr));
})();
</script>
</body>
</html>

对此：

[{"Date":"24.9.","Teacher":"Dohe","?":"Free","Hour":"1","Subject":"Math ","Class":"(9) ","Room":"--- ","(Teacher)":"Dohe","(Room)":"A001","XYY":" ","Information":" ","(Le.) nach":"Free."}]

但我之前需要 "Values" 标签和“1”、“2”，它们应该按行自动创建。至少可以将其写入新的 .json 文件，例如 data.json?

Answer 1

如果要将行数组表示为对象，请将 jsonArr.push(obj) 更改为 jsonObj[++rowIx] = obj，其中 jsonObj 先前已初始化为 {}，并且 rowIx 是一个已初始化为 0 的计数器（可能比在 i 上做数学运算更简单）。

您发布的预期输出无效 JSON，所以我假设它应该被另一组大括号包裹：

document.write("<br>"+JSON.stringify({"Values": jsonObj}));

至于保存到文件，这很难以可移植的方式进行。还有其他几个答案可以解决这个问题，包括以下内容：

Javascript: Create and save file
How to make a browser display a "save as dialog" so the user can save the content of a string to a file on his system?

将 HTML Table 转换为 Json 文件

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