1.关于“下载”
需要设置页面header的一个属性为：Content-Disposition: attachment; filename=下载的文件.txt
如：
<a href="down.jsp">下载</a> down.jsp:
<%
response.setHeader("Content-Disposition", "attachment;fileName=download.txt");
%>
2.关于Execl
使用jxl的
jxl地址：http://www.andykhan.com/jexcelapi/download.html
这里面有jar包和api文档，还有一些例子。
下面看正文了。
一、写个页面index.jsp：
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>导出Execl</title>
<script type="text/javascript" src="jquery-1.10.2.min.js"></script>
<script type="text/javascript">
function toExecl(){
//解析表格
var arrData=new Array();
var jsonData = "[";
var objTable=document.getElementById("tab");
if(objTable)
{
for(var i=0;i<objTable.rows.length;i++)//行
{
//每一行开始
var rowData = "{";
for(var j=0;j<objTable.rows[i].cells.length;j++)//列
{
//每一行的数据
if(j > 0){
rowData = rowData + "," + objTable.rows[i].cells[j].innerText;
}else{
rowData = rowData + objTable.rows[i].cells[j].innerText;
}
}
//每一行结尾
if(i < (objTable.rows.length -1)){
rowData = rowData + "},"
}else{
rowData = rowData + "}"
}
//添加每一行到json字符串中
jsonData = jsonData + rowData;
}
}
jsonData = jsonData + "]";
//alert(jsonData); /* //发送ajax请求
$.ajax({
url: "toExecl",
type: "POST",
data: {"jsonData": jsonData},
dataType: "text",
cache: false,
success: function (result) {
alert("success");
}
}); */ var form=$("<form>");//定义一个form表单
form.attr("style","display:none");
form.attr("target","");
form.attr("method","post");
form.attr("action","toExecl");//跳转到servlet
var input1=$("<input>");
input1.attr("type","hidden");
input1.attr("name","jsonData");
input1.attr("value",jsonData);
$("body").append(form);//将表单放置在web中
form.append(input1); form.submit();//表单提交
} //下载
function downloadDoc(filePath,fileName){
var path = filePath+fileName;
var contextLength = "<%=request.getContextPath()%>";
var sp = path.substring(contextLength.length,path.length);
document.getElementById("path").value = sp;
document.getElementById("fileName").value = fileName;
//down_frame.location.href = path;decodeURI(path);encodeURIComponent
var sForm1 = document.form1;
sForm1.action = "<%=request.getContextPath()%>/com/icss/mdm/usermanual/servlet/StandardDocDownServlet";
sForm1.submit(); }
</script>
</head>
<body>
<div id="tableExcel"> <table id="tab">
<tr height="18" style="height: 13.5pt">
<td height="18" width="72" style="height: 13.5pt; width: 54pt">姓名</td>
<td width="72" style="width: 54pt">性别</td>
<td width="72" style="width: 54pt">年龄</td>
</tr>
<tr height="18" style="height: 13.5pt">
<td height="18" style="height: 13.5pt">杨xx</td>
<td>男</td>
<td align="right">27</td>
</tr>
<tr height="18" style="height: 13.5pt">
<td height="18" style="height: 13.5pt">测试1</td>
<td>女</td>
<td align="right">18</td>
</tr>
<tr height="18" style="height: 13.5pt">
<td height="18" style="height: 13.5pt">测试2</td>
<td>女</td>
<td align="right">18</td>
</tr>
<tr height="18" style="height: 13.5pt">
<td height="18" style="height: 13.5pt">测试3</td>
<td>女</td>
<td align="right">18</td>
</tr>
<tr height="18" style="height: 13.5pt">
<td height="18" style="height: 13.5pt">刘德华</td>
<td>男</td>
<td align="right">48</td>
</tr>
</table>
</div>
<a href="javascript:void(0)" onclick="toExecl()">导出execl</a> <a href="down.jsp">下载</a> </body>
</html>
二、链接地址跳转到一个servlet
web.xml
<servlet>
<servlet-name>toExecl</servlet-name>
<servlet-class>com.mlxs.execl.servlet.ToExecl</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>toExecl</servlet-name>
<url-pattern>/toExecl</url-pattern>
</servlet-mapping>
ToExeclServlet:
package com.mlxs.execl.servlet; import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream; import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.VerticalAlignment;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException; public class ToExecl extends HttpServlet{ @Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
this.doPost(req, resp);
} @Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("UTF-8");
resp.setContentType("multipart/form-data");
resp.setHeader("Content-Disposition", "attachment;fileName=text.xls");
//处理前台传的数据
String dataStr = req.getParameter("jsonData");
dataStr = dataStr.replace("[{", "").replace("}]", "").replace("{", "");
String[] dataArr = dataStr.split("},"); try {
//1.创建一个workbook(对应Excel文件 )
WritableWorkbook workbook = Workbook.createWorkbook(resp.getOutputStream());
//2.在workbook中添加一个sheet(Excel文件中的sheet)
WritableSheet sheet = workbook.createSheet("导出数据", 0);
//3.创建表头单元格，并设置文字格式
WritableFont wf = new WritableFont(WritableFont.ARIAL, 12, WritableFont.NO_BOLD);
WritableCellFormat wcf = new WritableCellFormat(wf);
wcf.setVerticalAlignment(VerticalAlignment.CENTRE);
wcf.setAlignment(Alignment.CENTRE);
//4.设置行数
sheet.setRowView(1, 100); //5.设置数据
for (int i = 0; i < dataArr.length; i++) {
//每一行的数据
System.out.println("data:"+dataArr[i]);
String[] str = dataArr[i].split(",");
//每一列
for (int j = 0; j < str.length; j++) {
if(i==0){
sheet.addCell(new Label(j, i, str[j], wcf));//new Label(列号, 行号, 数据, 单元格)
continue;
}
sheet.addCell(new Label(j, i, str[j]));
} }
//6.end
workbook.write();
workbook.close();
} catch (RowsExceededException e) {
e.printStackTrace();
} catch (WriteException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} }