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Struts实时生成Excel文件下载

2007-11-14 15:25 423 查看

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

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

DownloadAction.java

import org.apache.struts.action.*;
import javax.servlet.http.*;
import java.io.OutputStream;
import test.whw.upload.ExcelBean;
/**
* <p>Title:DownloadAction </p>
* <p>Description: QRRSMMS </p>
* <p>Copyright: Copyright (c) 2004 jiahansoft</p>
* <p>Company: jiahansoft</p>
* @author wanghw
* @version 1.0
*/

public class DownloadAction extends Action {
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
try{
String fname = "test";//Excel文件名
OutputStream os = response.getOutputStream();//取得输出流
response.reset();//清空输出流
response.setHeader("Content-disposition", "attachment; filename=" + fname + ".xls");//设定输出文件头
response.setContentType("application/msexcel");//定义输出类型
ExcelBean eb = new ExcelBean();
eb.expordExcel(os);//调用生成excel文件bean
}catch(Exception e){
System.out.println(e);
}

return mapping.findForward("display");
}
}

ExcelBean.java

package test.whw.upload;
import java.io.*;
import jxl.*;
import jxl.write.*;
import jxl.format.*;
import java.util.*;
import java.awt.Color;

public class ExcelBean {
public ExcelBean(){}
public String expordExcel(OutputStream os)throws Exception{
jxl.write.WritableWorkbook wbook = Workbook.createWorkbook(os); //建立excel文件
String tmptitle = "测试文件"; //标题
jxl.write.WritableSheet wsheet = wbook.createSheet("第一页", 0); //sheet名称
//设置excel标题
jxl.write.WritableFont wfont = new jxl.write.WritableFont(
WritableFont.ARIAL, 16,
WritableFont.BOLD, false, jxl.format.UnderlineStyle.NO_UNDERLINE,
jxl.format.Colour.BLACK);
jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(
wfont);
jxl.write.Label wlabel1;
wlabel1 = new jxl.write.Label(5, 0, tmptitle, wcfFC);
wsheet.addCell(wlabel1);
wfont = new jxl.write.WritableFont(
WritableFont.ARIAL, 14,
WritableFont.BOLD, false, jxl.format.UnderlineStyle.NO_UNDERLINE,
jxl.format.Colour.BLACK);
wcfFC = new jxl.write.WritableCellFormat(
wfont);
jxl.write.Label wlabel;
wlabel = new jxl.write.Label(0, 0, "写入内容");
wsheet.addCell(wlabel); //
wbook.write(); //写入文件
wbook.close();
os.close();
return "success";
}
}

struts-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>
<action-mappings>
<action type="test.whw.upload.DownloadAction" path="/download">
<forward name="display" path="/display.jsp" />
</action>
</action-mappings>
</struts-config>

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