Action类

package com.cmsz.rist.file;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.InputStream;import java.io.OutputStream;import java.net.URLEncoder;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;import org.apache.struts.actions.DispatchAction;public class DownloadFile extends DispatchAction{    public ActionForward execute(ActionMapping mapping, ActionForm form,            HttpServletRequest request, HttpServletResponse response)  {                String path = request.getSession().getServletContext().getRealPath("/")+"excelTemplate/keywordTemplate.xls";        BufferedInputStream   bis = null;        BufferedOutputStream  bos = null;        InputStream fis = null;        OutputStream fos = null;                try{            File uploadFile = new File(path);                fis = new FileInputStream(uploadFile);            bis = new BufferedInputStream(fis);            fos = response.getOutputStream();            bos = new BufferedOutputStream(fos);                        response.reset();            response.setHeader("Content-disposition", "attachment;filename =" + URLEncoder.encode(path.substring(path.lastIndexOf("/")+1), "utf-8"));            int bytesRead = 0;            byte[] buffer = new byte[4096];            while((bytesRead = bis.read(buffer,0,4096)) != -1){                bos.write(buffer, 0, bytesRead);            }            bos.flush();            fis.close();            bis.close();            fos.close();            bos.close();            //return mapping.findForward("success");                        return null;        }catch(FileNotFoundException e){            e.printStackTrace();                    return mapping.findForward("error");        }catch(Exception e){            e.printStackTrace();            return null;        }            }}

location.href="downloadFile.do";

参考链接：