在servlet、javaBean、。。。中生成一个HSSFWorkbook,再让它返回给JSP页面。
在JSP页面中：首先设置页面响应的MIME类型，
即：response.setContentType("application/msexcel")
再设置响应标题：
response.setHeader("Content-disposition","inline; filename=data.xls") //attachment
这里有两种形式：inline/attachment
在JSP页面中得到workbook后--》new 一个输出流：
OutputStream os = response.getOutputStream()
再把workbook写入输出流中——》
就可以保存或打开以Excel文件形式的文件。
最初的一个代码如下：
java类：
package com.hhxy.doexcel;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
public class DownExcel ｛
public HSSFWorkbook downExcel (){
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet();
HSSFRow row = sheet.createRow(0);
HSSFCell cell = row.createCell((short)0);
cell.setCellValue("The first cell!");
cell = row.createCell((short)1);
cell.setCellValue("Second");
cell = row.createCell((short)2);
cell.setCellValue("Third");
cell = row.createCell((short)3);
cell.setCellValue("Fouth");
return wb;
}
}
JSP布面如下：
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%>
<%@ page import = "com.hhxy.doexcel.*" %>
<%@ page import = "java.util.*" %>
<%@ page import = "java.io.*"%>
<%@ page import = "org.apache.poi.hssf.usermodel.HSSFWorkbook" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "
http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Excel档案呈现方式</title>
</head>
<body>
<%
String excel = request.getParameter("excel");
if(excel !=null && "true".equals(excel)){
response.setContentType("application/msexcel");
response.setHeader("Content-disposition","inline; filename=data.xls"); //attachment
DownExcel test = new DownExcel();
HSSFWorkbook wb = test.downExcel();
OutputStream os = response.getOutputStream();
wb.write(os);
os.flush();
os.close();
}else{
%>
<div align="center"><a href="TestExcel.jsp?excel=true">生成Excel</a></div>
<%}%>
</body>