javascript导入excel文件（IE浏览器）

由于使用了插件ActiveXObject，而这个插件只是IE提供的，因此以下所有代码都只能在IE中执行

方法一：

可以导入xls、xlsx文件。
固定导入文件的列数。

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <title> New Document </title>
  <meta name="Generator" content="EditPlus">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <script type="text/javascript">javascript">
    function ReadExcel() {
     var tempStr = "";
           //得到文件路径的值
           var filePath = document.getElementById("upfile").value;
           //创建操作EXCEL应用程序的实例
           var oXL = new ActiveXObject("Excel.application");
            //打开指定路径的excel文件
            var oWB = oXL.Workbooks.open(filePath);
           //操作第一个sheet(从一开始，而非零)
           oWB.worksheets(1).select();
           var oSheet = oWB.ActiveSheet;
           //使用的行数
           var rows =  oSheet .usedrange.rows.count;
           //读取每格的值，注意是从1开始
           try {
            for (var i = 1; i <= rows; i++) {
             if (oSheet.Cells(i, 1).value == "null" || oSheet.Cells(i, 2).value == "null")
              break;
            var a = oSheet.Cells(i, 1).value.toString() == "undefined" ? "": oSheet.Cells(i, 1).value;
            tempStr += (" " + oSheet.Cells(i, 1).value + " " + oSheet.Cells(i, 2).value + " " + oSheet.Cells(i, 3).value + "\n");
          }
        }
        catch(e) {
          document.getElementById("txtArea").value = tempStr;
        }
        document.getElementById("txtArea").value = tempStr;
           //退出操作excel的实例对象
           oXL.Application.Quit();
           //手动调用垃圾收集器
           CollectGarbage();
          }
  </script>
 </head>

 <body>
  <input type="file" id="upfile" /><input type="button" onclick="ReadExcel();" value="read">
<br>
<textarea id="txtArea" cols=50 rows=10></textarea>
 </body>
</html>

方法二：

可以导入xls、xlsx文件。
直接读取文件所有内容，还可以读取多个sheet。

<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<head>
<title>Untitled Page</title>
</head>
<script language="javascript" type="text/javascript">javascript">
function toWeb(fileName) {
    rstArray = importXLS(fileName);
    rstArrayUnique = rstUnique(rstArray);//删除重复行
}

function importXLS(fileName) {
    var excelCon;
    excelCon = new ActiveXObject("ADODB.Connection");
    excelCon.Provider = "Microsoft.Jet.OLEDB.4.0; Persist Security Info = False;";
    excelCon.ConnectionString = "Data Source=" + fileName + ";Extended Properties='Excel 8.0; HDR=NO;IMEX=2'" ;
    excelCon.CursorLocation = 1;//adUseNoe
    excelCon.Open;
    var strQueryExcel;
    //var strSheetName = "Sheet2$";
    var rsTemp = new ActiveXObject("ADODB.Recordset");//hold a set of records from a database table
    rsTemp = excelCon.OpenSchema(20);//return Recordset
	var rst = new Array();
    var strTable;
    while (!rsTemp.EOF)//end of file
    {
        if (rsTemp("TABLE_TYPE") == "TABLE") {
            rsExcel = new ActiveXObject("ADODB.Recordset");
            strQueryExcel = "SELECT * FROM [" + rsTemp("TABLE_NAME") + "]";
            rsExcel.ActiveConnection = excelCon;
            rsExcel.Open(strQueryExcel);
            strTable=rsTemp("TABLE_NAME")+"表内容<br><table id='excelTable' border='1' cellspacing='0' cellpadding='0'>";//style='VISIBILITY:hidden'
            for (i = 0; i < rsExcel.Fields.Count;i++) {
                strTable = strTable+"<td>" + rsExcel.Fields(i).name + "</td>";
            }
            do {
                strTable = strTable + "<tr>";
                var rst_i = new Array();
                for(i = 3; i < rsExcel.Fields.Count; i++) {
                    strTable=strTable + "<td>" + rsExcel.Fields(i).value + "</td>";
                    rst_i.push(rsExcel.Fields(i).value);
                }

                strTable=strTable + "</tr>";
                rst.push(rst_i);
                rsExcel.MoveNext;
            }while(!rsExcel.EOF);

        }
        document.write(strTable + "</table><br>")
        rsExcel = null;
        rsTemp.MoveNext;
    }
    excelCon.Close;
    excelCon = null;
    rsExcel = null;
    return rst;
}

function rstUnique(arr) {
    var result = [], hash = {};
    for (var i = 0, elem; (elem = arr[i]) != null; i++) {
        if (!hash[elem]) {
            result.push(elem);
            hash[elem] = true;
        }
    }
    return result;
}

</script>
<body>
<input type="file" id="file_open" />
<input type="button" id="button_file_open" value="import_file" onClick="if(file_open.value=='')alert('请选择xls文件');else toWeb(file_open.value)" />
</body>
</html>