import java.io.IOException
import java.io.PrintWriter
import javax.servlet.ServletException
import javax.servlet.ServletOutputStream
import javax.servlet.http.HttpServlet
import javax.servlet.http.HttpServletRequest
import javax.servlet.http.HttpServletResponse
/**
* 利用Servlet导出Excel
* @author CHUNBIN
*
*/
public class ExportExcelServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response)
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8")//设置request的编码方式，防止中文乱码
String fileName ="导出数据"//设置导出的文件名称
StringBuffer sb = new StringBuffer(request.getParameter("tableInfo"))//将表格信息放入内存
String contentType = "application/vnd.ms-excel"//定义导出文件的格式的字符串
String recommendedName = new String(fileName.getBytes(),"iso_8859_1")//设置文件名称的编码格式
response.setContentType(contentType)//设置导出文件格式
response.setHeader("Content-Disposition", "attachment filename=" + recommendedName + "\"")//
response.resetBuffer()
//利用输出输入流导出文件
ServletOutputStream sos = response.getOutputStream()
sos.write(sb.toString().getBytes())
sos.flush()
sos.close()
}
} <%@ 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Excel</title>
<script type="text/javascript">
function test(){
document.getElementById("tableInfo").value=document.getElementById("table").innerHTML
}
</script>
<style>
body{font-family:宋体font-size:11pt}
</style>
</head>
<body>
<form action="<%=request.getContextPath()%>/servlet/ExportExcelServlet" method="post">
<span id="table">
<table bgcolor="#EEECF2" bordercolor="#A3B2CC" border="1" cellspacing="0">
<tr><th>学号</th><th>姓名</th><th>科目</th><th>分数</th></tr>
<tr><td>10001</td><td>赵二</td><td>高数</td><td>82</td></tr>
<tr><td>10002</td><td>张三</td><td>高数</td><td>94</td></tr>
<tr><td>10001</td><td>赵二</td><td>线数</td><td>77</td></tr>
<tr><td>10002</td><td>张三</td><td>线数</td><td>61</td></tr>
</table>
</span><br/>
<input type="submit" name="Excel" value="导出表格" onclick="test()"/>
<input type="hidden" id="tableInfo" name="tableInfo" value=""/>
</form>
</body>
</html>
以上代码来自网络：http://jtlyuan.iteye.com/blog/1322097
把response的输出类型设置成response.setContentType("application/x-download
response.addHeader("Content-Disposition","attachmentfilename=myexcel.xls" )
POI结果直接给response的输出流，就可以了
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