<table border="1">

                    <thead>

                        <tr class="tr-background">

                            <td class="border-left">题目1</td>

                            <td>题目2</td>

                            <td>题目3</td>

                            <td>题目4</td>

                            <td>题目5</td>

                            <td>题目6</td>

                            <td>题目7</td>

                        </tr>

                    </thead>

                 <tr>

                    <td>0</td>

                    <td>1</td>

                    <td>2</td>

                    <td>3</td>

                    <td>4</td>

                    <td>5</td>

                    <td>6</td>

                    <td>7</td>

                    </tr>

                </table>

获取按钮

 <button type="button" class="layui-btn" onclick="tableJson(this)">获取数据</button>

js代码

    function tableJson(obj) {

//找到要获取数据的表格

        obj = $(obj).parent().siblings().children();

//定义一个空数组

        var result = [];

        obj.each(function () {

            var tr = obj.find('tr');

            for (var i = 1; i < tr.length; i++) { // 遍历表格中每一行的内容

                var tds = $(tr[i]).find("td");

                if (tds.length > 0) {

                    result.push({

                        "child_1": $(tds[2]).text(),

                        "child_2": $(tds[3]).text(),

                        "child_3": $(tds[4]).text(),

                        "child_4": $(tds[5]).text(),

                        "child_5": $(tds[6]).text(),

                        "child_6": $(tds[7]).text(),

                        "child_7": $(tds[8]).text()

                    })

                }

            }

            var jsonData = [];

            jsonData.push(result);

//将数组内容转化成json对象

            JSON.stringify(jsonData);

            console.log(jsonData)

        });

    }