jQuery's JSON dynamically obtains table data code

/*双击展开关闭*/
function dbClick(obj) {
if($(obj).next().is(":hidden")) {
$(obj).next().show();
} else {
$(obj).next().hide();
}
};
$(function() {
$("#mainTable thead").next().empty();
var k = 0;
$.getJSON("revenue.json", function(data) {
$.each(data, function(mainIndex, mainTable) {
/*收入单位*/
var mainTrObj = "<tr class='mainTr warning' ondblclick='dbClick(this)'><td>" + mainTable.incomeUnit + "</td><td>" + mainTable.firm + "</td><td>" + mainTable.number + "</td><td>" + mainTable.instructionType + "</td><td>" + mainTable.dept + "</td><td>" + mainTable.totalPrice + "</td></tr>";
$("#mainTable").append(mainTrObj);
/*支出单位表头*/
var haveChild = data[k].child.length;
if(haveChild == 0) {
var nullHead = "<tr><td colspan='5' align='center'>暂无数据</td></tr>";
$("#mainTable").append(nullHead);
} else {
var smallTit = "<tr><td colspan='6'><table id='smallTable" + k + "' class='table-condensed table smallTable'><tr id='smallTr" + k + "' class='success'><td>支出结算单位</td><td>数量</td><td>支出价格</td><td>费用类型</td></tr></table></td></tr>";
$("#mainTable").append(smallTit);
}
/*支出单位遍历*/
var numnerSum = 0;
var priceSum = 0;
var unsettled = 0;
var child = data[k].child;
for(var j = 0; j < haveChild; j++) {
numnerSum = numnerSum + parseInt(child[j].number);
priceSum = priceSum + parseFloat(child[j].price);
priceSum = Math.round(priceSum * 100) / 100;
unsettled = parseFloat(mainTable.totalPrice) - priceSum;
unsettled = Math.round(unsettled * 100) / 100;
var smallTrObj = "<tr class='smallTr'><td>" + child[j].expendUnit + "</td><td>" + child[j].number + "</td><td>" + child[j].price + "</td><td colspan='2'>" + child[j].type + "</td></tr>";
$("#smallTr" + k).after(smallTrObj);
/*计算数量、价格、未结费*/
}
/*小计行*/
var totalTrObj = "<tr class='danger'><td>小计</td><td>" + numnerSum + "</td><td>" + priceSum + "</td><td align='center'>未结费     " + unsettled + "</td></tr>";
$("#smallTable" + k).append(totalTrObj);
console.log(priceSum);
console.log("未结费" + unsettled);
k++;
});
});

jQuery JSON动态获取表格数据代码是一款jQuery函数调用json表格动态获取数据，表格全部折叠，全部关闭，双击表格行折叠关闭表格。