web上传下载

提示存储地址的下载

public ActionForward exportExcel(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) { ?

                 String path;

 //创建临时文件夹   path=request.getContextPath()+"\\shopCart";   new File(path).mkdirs();     //创建临时文件,存放需要下载的内容   path=path+"\\"+new Date().getTime()+".xls";   File file = new File(path);   //设置头信息，声明文件类型，文件默认名称 response.setContentType("application/msexcel"); response.setHeader("content-disposition", "attachment; filename=order_"+new Date().getTime()+".xls"); //读取临时文件内容，将内容写到客户端   OutputStream os;   try {       os = response.getOutputStream();       java.io.BufferedInputStream bis = new java.io.BufferedInputStream(new java.io.FileInputStream(file));       byte[] readdata = new byte[1024];       while (bis.read(readdata) != -1) {           os.write(readdata);       }       os.flush();       os.close();       bis.close();      //将临时文件删除       file.delete();       response.sendRedirect("/ecman/searchMerchandise.jsp");   } catch (IOException e1) {       e1.printStackTrace();   }   return null;  

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基于struts 上传操作

首先定commons-fileupload.jar有在WEB-INF/lib目下。   FormBean:                                                       import   javax.servlet.http.*;   import   org.apache.struts.action.*;   import   org.apache.struts.upload.*;                                                         public   class   UploadForm   extends   ActionForm   {           private   FormFile   file;                                                              public   void   setFile(FormFile   file)   {                   this.file   =   file;           }                                                                  public   FormFile   getFile()   {                   return   file;           }                                                                 public   void   reset(ActionMapping   mapping,   HttpServletRequest   req)   {                   file   =   null;           }   }?

使用struts及html标签

<html:form  action= "/cart.do" method= "post" enctype= "multipart/form-data">     

<html:hidden property="status" value="importExcel"/> 文件路径： <html:file property= "excelFile"/>     <input type="submit" value="上传"/>     </html:form><form action="/cart.do" method="post" enctype="multipart/form-data" name="excelForm"><input type="hidden" name="status" value="importExcel"/>文件路径：<input name="excelFile" type="file" id="excelFile"/><input type="submit" name="Submit" value="提交"/></form>

?ction: import   java.io.*;   import   javax.servlet.http.*;   import   org.apache.struts.action.*;   import   org.apache.struts.upload.*;   public   class   UploadAction   extends   Action   {           public   ActionForward   execute(ActionMapping   mapping,                                                                     ActionForm   form,                                                                     HttpServletRequest   request,                                                                     HttpServletResponse   response)    throws   Exception   {                   UploadForm   fileForm   =   (UploadForm)   form;                   FormFile   file   =   fileForm.getFile();                   FileOutputStream   fileOutput   =   new   FileOutputStream( "/home/caterpillar/files/ "   +   file.getFileName());                                                                                                                                                                                        fileOutput.write(file.getFileData());                   fileOutput.flush();                   fileOutput.close();                                                                                                                                                                                                           return   mapping.findForward( "success ");           }   } 

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