日期:2014-05-16  浏览次数:20350 次

用POI在JSP中生成Excel报表

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> 

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