原table未合并单元格
合并后table
完整示例代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<table border="1px">
<thead>
<tr>
<th>时间</th>
<th>课程</th>
</tr>
</thead>
<tbody></tbody>
</table>
</body>
<script>
//原始数据
var list = [
{time:'上午',course:'语文'},
{time:'上午',course:'数学'},
{time:'上午',course:'英语'},
{time:'上午',course:'化学'},
{time:'下午',course:'物理'},
{time:'下午',course:'地理'},
{time:'下午',course:'体育'},
{time:'晚上',course:'自习'}
];
//循环遍历
for (var i = 0;i<list.length;i++) {
//循环开始行
var start_row ;
//需合并的行数
var rowspan = 1;
//循环到最后一行时
if(i==list.length-1){
//如果最后一行和倒数第二行属性不同，则rowspan=1；否则直接结束循环
if(list[i].time!=list[i-1].time){
list[i].rowspan = rowspan;
}
break;
}
//内层循环记录rowspan的数量
for (var j = i;j<list.length-1;j++) {
//记录循环结束的行数
start_row=j;
//属性相同则rowspan+1；否则直接结束内循环
if(list[j].time==list[j+1].time){
rowspan ++;
}else{
break;
}
}
//为数组添加rowspan属性
list[i].rowspan = rowspan;
//控制外循环从内循环结束的行数开始
i = start_row;
}
/*
处理完数据：
list = [
{time: "上午", course: "语文", rowspan: 4},
{time: "上午", course: "数学"},
{time: "上午", course: "英语"},
{time: "上午", course: "化学"},
{time: "下午", course: "物理", rowspan: 3},
{time: "下午", course: "地理"},
{time: "下午", course: "体育"},
{time: "晚上", course: "自习", rowspan: 1}
]
*/
//页面渲染
var tbody = document.getElementsByTagName('tbody');
var html = '';
for (var i = 0;i<list.length;i++) {
html += '<tr>';
//动态添加rowspan属性
if(list[i].rowspan != null){
html += '<td rowspan = '+list[i].rowspan+'>'+list[i].time+'</td>';
}
html += '<td>'+list[i].course+'</td></tr>';
}
tbody[0].innerHTML = html;
</script>
</html>
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