需求: 从excel文件中解析里面的内容
            
            
              html
              
              
            
          
          1、使用插件xlsx.full.min.js,地址:https://unpkg.com/xlsx/dist/xlsx.full.min.js
        实例:
            
            
              js
              
              
            
          
          	<script src="https://unpkg.com/xlsx/dist/xlsx.full.min.js"></script>
    <input type="file" id="input_btn" />
    <div id="excel_show"></div>
 
    <script>
        const inputbtn = document.getElementById('input_btn');
        const excelshow = document.getElementById('excel_show');
 
        inputbtn.addEventListener('change', function(e) {
            const file = e.target.files[0];
            const reader = new FileReader();
            reader.onload = function(e) {
                const data = new Uint8Array(e.target.result);
                const workbook = XLSX.read(data, { type: 'array' });//表格对象
                // workbook.SheetNames;  //获取到所有表格
                const firstSheetName = workbook.SheetNames[0]; //取第一张表
                const worksheet = workbook.Sheets[firstSheetName];
                 //1、获得 **.xlsx文件 的json格式内容
                //const jsonData = XLSX.utils.sheet_to_json(worksheet, { header: 1 });
                //excelshow.innerHTML = JSON.stringify(jsonData);
                //2、将表格数据转换为html代码
                let html = XLSX.utils.sheet_to_html(worksheet);
				console.log('html====',html)
				//将html代码渲染到指定容器
				excelshow.innerHTML = html;
            };
            reader.readAsArrayBuffer(file);
        });
    </script>
        例如:
返回展示的结果:
\["序号","名字","id","数据"\],\[1,"aa",111,11111\],\[2,"bb",222,22222\],\[3,"cc",333,33333\]
即:
