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Java实现前台页面下载方法

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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>html 表格导出</title>
<script language="JavaScript" type="text/javascript">

function getTblData(inTbl, inWindow) {

var rows = 0;
var tblDocument = document;
if (!!inWindow && inWindow != "") {

if (!document.all(inWindow)) {
return null;
}

else {
tblDocument = eval(inWindow).document;
}

}

var curTbl = tblDocument.getElementById(inTbl);
var outStr = "";
if (curTbl != null) {
for (var j = 0; j < curTbl.rows.length; j++) {
for (var i = 0; i < curTbl.rows[j].cells.length; i++) {

if (i == 0 && rows > 0) {
outStr += " t";
rows -= 1;
}

outStr += curTbl.rows[j].cells[i].innerText + "t";
if (curTbl.rows[j].cells[i].colSpan > 1) {
for (var k = 0; k < curTbl.rows[j].cells[i].colSpan - 1; k++) {
outStr += " t";
}
}
if (i == 0) {
if (rows == 0 && curTbl.rows[j].cells[i].rowSpan > 1) {
rows = curTbl.rows[j].cells[i].rowSpan - 1;
}
}
}
outStr += "rn";
}
}

else {
outStr = null;
alert(inTbl + "不存在 !");
}
return outStr;
}

function getExcelFileName() {
var d = new Date();
var curYear = d.getYear();
var curMonth = "" + (d.getMonth() + 1);
var curDate = "" + d.getDate();
var curHour = "" + d.getHours();
var curMinute = "" + d.getMinutes();
var curSecond = "" + d.getSeconds();
if (curMonth.length == 1) {
curMonth = "0" + curMonth;
}

if (curDate.length == 1) {
curDate = "0" + curDate;
}

if (curHour.length == 1) {
curHour = "0" + curHour;
}

if (curMinute.length == 1) {
curMinute = "0" + curMinute;
}

if (curSecond.length == 1) {
curSecond = "0" + curSecond;
}
var fileName = "table" + "_" + curYear + curMonth + curDate + "_"
+ curHour + curMinute + curSecond + ".csv";
return fileName;

}

function doFileExport(inName, inStr) {
var xlsWin = null;
if (!!document.all("glbHideFrm")) {
xlsWin = glbHideFrm;
}
else {
var width = 6;
var height = 4;
var openPara = "left=" + (window.screen.width / 2 - width / 2)
+ ",top=" + (window.screen.height / 2 - height / 2)
+ ",scrollbars=no,width=" + width + ",height=" + height;
xlsWin = window.open("", "_blank", openPara);
}
xlsWin.document.write(inStr);
xlsWin.document.close();
xlsWin.document.execCommand('Saveas', true, inName);
xlsWin.close();

}
var idTmr;
function  getExplorer() {
var explorer = window.navigator.userAgent ;
//ie
if (explorer.indexOf("MSIE") >= 0) {
return 'ie';
}
//firefox
else if (explorer.indexOf("Firefox") >= 0) {
return 'Firefox';
}
//Chrome
else if(explorer.indexOf("Chrome") >= 0){
return 'Chrome';
}
//Opera
else if(explorer.indexOf("Opera") >= 0){
return 'Opera';
}
//Safari
else if(explorer.indexOf("Safari") >= 0){
return 'Safari';
}
}
function method(tableid) {
if(getExplorer()=='ie')
{
var curTbl = document.getElementById(tableid);
var oXL = new ActiveXObject("Excel.Application");
var oWB = oXL.Workbooks.Add();
var xlsheet = oWB.Worksheets(1);
var sel = document.body.createTextRange();
sel.moveToElementText(curTbl);
sel.select();
sel.execCommand("Copy");
xlsheet.Paste();
oXL.Visible = true;

try {
var fname = oXL.Application.GetSaveAsFilename("Excel.xls", "Excel Spreadsheets (*.xls), *.xls");
} catch (e) {
print("Nested catch caught " + e);
} finally {
oWB.SaveAs(fname);
oWB.Close(savechanges = false);
oXL.Quit();
oXL = null;
idTmr = window.setInterval("Cleanup();", 1);
}

}
else
{
tableToExcel(tableid)
}
}
function Cleanup() {
window.clearInterval(idTmr);
CollectGarbage();
}
var tableToExcel = (function() {
var uri = 'data:application/vnd.ms-excel;base64,',
template = '<html><head><meta charset="UTF-8"></head><body><table>{table}</table></body></html>',
base64 = function(s) { return window.btoa(unescape(encodeURIComponent(s))) },
format = function(s, c) {
return s.replace(/{(\w+)}/g,
function(m, p) { return c[p]; }) }
return function(table, name) {
if (!table.nodeType) table = document.getElementById(table)
var ctx = {worksheet: name || 'Worksheet', table: table.innerHTML}
window.location.href = uri + base64(format(template, ctx))
}
})()

</script>
</head>
<body>

<div >
<button type="button" onclick="method('tableExcel')">导出Excel</button>
</div>
<div id="myDiv">
<table id="tableExcel" width="100%" border="1" cellspacing="0" cellpadding="0">
<tr>
<td>编号</td>
<td>姓名</td>
<td>性别</td>
<td>年龄</td>
<td>爱好</td>
</tr>
<tr>
<td>001</td>
<td>张三</td>
<td男</td>
<td>21</td>
<td>打篮球</td>
</tr>
<tr>
<td>002</td>
<td>李四</td>
<td>女</td>
<td>34</td>
<td>瑜伽</td>
</tr>
<tr>
<td>003</td>
<td>王五</td>
<td>男</td>
<td>25</td>
<td>跑步</td>
</tr>
</table>
</div>
</body>
</html>
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