通过流下载附件，使用struts2下载附件

通过流下载附件，使用struts2下载附件 文章分类:Java编程 1、通过流下载附件 Java代码 //文件下载 public String fileDown(){ HttpServletResponse response = ServletActionContext.getResponse(); try { String path=session.getServletContext().getRealPath("/"); filename = new String( filename.getBytes("ISO-8859-1") , "UTF-8"); String downname = filename.split("---")[2]; String url = path+"doc/affix/"+tba.getIassistnoticeid()+"/"+filename; OutputStream out = response.getOutputStream(); response.reset(); // 指定返回的是一个不能被客户端读取的流，必须被下载 response.setContentType("application/octet-stream;charset=UTF-8"); // 添加头信息，为"文件下载/另存为"对话框指定默认文件名 response.setHeader("Content-disposition", "attachment; filename="+URLEncoder.encode(downname,"UTF-8")); //URLEncoder.encode转换，解除文 件名乱码 // 添加头信息，指定文件大小，让浏览器能够显示下载进度 //response.addheader("content-length", url.length.tostring()); FileInputStream fis=new FileInputStream(url); int i=-1; while((i=fis.read())!=-1){//读文件 out.write(i); //写文件 } out.flush();out.close();fis.close(); } catch (IOException e) { e.printStackTrace(); }finally{ return null; } } //文件下载 public String fileDown(){ HttpServletResponse response = ServletActionContext.getResponse(); try { String path=session.getServletContext().getRealPath("/"); filename = new String( filename.getBytes("ISO-8859-1") , "UTF-8"); String downname = filename.split("---")[2]; String url = path+"doc/affix/"+tba.getIassistnoticeid()+"/"+filename; OutputStream out = response.getOutputStream(); response.reset(); // 指定返回的是一个不能被客户端读取的流，必须被下载 response.setContentType("application/octet-stream;charset=UTF-8"); // 添加头信息，为"文件下载/另存为"对话框指定默认文件名 response.setHeader("Content-disposition", "attachment; filename="+URLEncoder.encode(downname,"UTF-8")); //URLEncoder.encode转换，解除文 件名乱码 // 添加头信息，指定文件大小，让浏览器能够显示下载进度 //response.addheader("content-length", url.length.tostring()); FileInputStream fis=new FileInputStream(url); int i=-1; while((i=fis.read())!=-1){//读文件 out.write(i); //写文件 } out.flush();out.close();fis.close(); } catch (IOException e) { e.printStackTrace(); }finally{ return null; } } 2、使用struts2下载附件Java代码 //文件下载 public String fileDown(){ mimeType = session.getServletContext().getMimeType(filename); return "filedown"; } /** * 封装处理文件名 */ public void setFilename(String filename) { try { this.filename = new String(filename.getBytes("ISO8859-1"),"UTF-8"); downname = filename.split("---")[2]; } catch (UnsupportedEncodingException e) { e.printStackTrace(); } } public String getFilename() { try { return new String(filename.getBytes(),"ISO8859-1"); } catch (UnsupportedEncodingException e) { return this.filename; } } public String getMimeType() { return mimeType; } public InputStream getInStream() { String path=session.getServletContext().getRealPath("/"); String url = path+"doc/affix/"+tba.getIassistnoticeid()+"/"+filename; try { inStream = new FileInputStream(url); } catch (FileNotFoundException e) { e.printStackTrace(); } if (inStream == null) { inStream = new ByteArrayInputStream("Sorry,File not found !".getBytes()); } return inStream; } public String getDownname() { return downname; } public void setDownname(String downname) { this.downname = downname; } //文件下载 public String fileDown(){ mimeType = session.getServletContext().getMimeType(filename); return "filedown"; } /** * 封装处理文件名 */ public void setFilename(String filename) { try { this.filename = new String(filename.getBytes("ISO8859-1"),"UTF-8"); downname = filename.split("---")[2]; } catch (UnsupportedEncodingException e) { e.printStackTrace(); } } public String getFilename() { try { return new String(filename.getBytes(),"ISO8859-1"); } catch (UnsupportedEncodingException e) { return this.filename; } } public String getMimeType() { return mimeType; } public InputStream getInStream() { String path=session.getServletContext().getRealPath("/"); String url = path+"doc/affix/"+tba.getIassistnoticeid()+"/"+filename; try { inStream = new FileInputStream(url); } catch (FileNotFoundException e) { e.printStackTrace(); } if (inStream == null) { inStream = new ByteArrayInputStream("Sorry,File not found !".getBytes()); } return inStream; } public String getDownname() { return downname; } public void setDownname(String downname) { this.downname = downname; } struts2配置文件 Xml代码 attachment;filename="${downname}" ${mimeType} inStream