Struts实时生成Excel文件下载

我做的项目原来是先在服务器上生成一个excel文件，然后用jspsmartupload下载的，可是由于用jspsmartupload下载的excel文件由于编码问题会有损坏，而且服务器的压力也太大，所以改为在Action中生成excel文件，然后下载，方便多了。由于项目的原因，excel文件是实时生成的，对于jxl的使用，大家可以参考jxl相关的文章。
有什么问题可以和我联系。
MSN:whw_dream(AT)hotmail.com
代码如下：
test.jsp

---

1<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
2<html:html>
3<html:button property="button" onclick="printAll()">
4DownLoad
5</html:button>
6</html:html>
7<script language='javascript'>
8function printAll(){ location.href="<%=request.getContextPath()%>/download.do"; }
9</script>

---

DownloadAction.java

---

1import org.apache.struts.action.*;
2import javax.servlet.http.*;
3import java.io.OutputStream;
4import test.whw.upload.ExcelBean;
5/** *//**
6 * <p>Title:DownloadAction </p>
7 * <p>Description: QRRSMMS </p>
8 * <p>Copyright: Copyright (c) 2004 jiahansoft</p>
9 * <p>Company: jiahansoft</p>
10 *@author wanghw
11 *@version 1.0
12*/
13
14publicclass DownloadActionextends Action{
15 public ActionForward execute(ActionMapping mapping,
16                               ActionForm form,
17                               HttpServletRequest request,
18                               HttpServletResponse response)
19     throws Exception{
20   try{
21      String fname= "test";//Excel文件名
22      OutputStream os= response.getOutputStream();//取得输出流
23      response.reset();//清空输出流
24      response.setHeader("Content-disposition","attachment; filename="+ fname + ".xls");//设定输出文件头
25      response.setContentType("application/msexcel");//定义输出类型
26      ExcelBean eb= new ExcelBean();
27      eb.expordExcel(os);//调用生成excel文件bean
28    }catch(Exception e){
29      System.out.println(e);
30    }
31
32   return mapping.findForward("display");
33  }
34}
35

---

ExcelBean.java

---

1package test.whw.upload;
2import java.io.*;
3import jxl.*;
4import jxl.write.*;
5import jxl.format.*;
6import java.util.*;
7import java.awt.Color;
8
9publicclass ExcelBean{
10 public ExcelBean(){}
11 public String expordExcel(OutputStream os)throws Exception{
12    jxl.write.WritableWorkbook wbook= Workbook.createWorkbook(os);//建立excel文件
13    String tmptitle= "测试文件";//标题
14    jxl.write.WritableSheet wsheet= wbook.createSheet("第一页",0); //sheet名称
15   //设置excel标题
16    jxl.write.WritableFont wfont= new jxl.write.WritableFont(
17        WritableFont.ARIAL,16,
18        WritableFont.BOLD,false, jxl.format.UnderlineStyle.NO_UNDERLINE,
19        jxl.format.Colour.BLACK);
20    jxl.write.WritableCellFormat wcfFC= new jxl.write.WritableCellFormat(
21        wfont);
22    jxl.write.Label wlabel1;
23    wlabel1= new jxl.write.Label(5,0, tmptitle, wcfFC);
24    wsheet.addCell(wlabel1);
25    wfont= new jxl.write.WritableFont(
26        WritableFont.ARIAL,14,
27        WritableFont.BOLD,false, jxl.format.UnderlineStyle.NO_UNDERLINE,
28        jxl.format.Colour.BLACK);
29    wcfFC= new jxl.write.WritableCellFormat(
30        wfont);
31    jxl.write.Label wlabel;
32    wlabel= new jxl.write.Label(0,0, "写入内容");
33    wsheet.addCell(wlabel);//
34    wbook.write();//写入文件
35    wbook.close();
36    os.close();
37   return "success";
38  }
39}
40

---

struts-config.xml

---

1<?xml version="1.0" encoding="UTF-8"?>
2<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
3<struts-config>
4 <action-mappings>
5   <action type="test.whw.upload.DownloadAction" path="/download">
6     <forward name="display" path="/display.jsp"/>
7   </action>
8 </action-mappings>
9</struts-config>
10<!--display.jsp是成功的提示页面-->