java文件上传下载

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import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.multipart.MultipartFile;/**     *  上传文档     * @param upExcel      * @return     */    @RequestMapping(value="/formExcel",method = RequestMethod.POST)    @ResponseBody    public void formExcel(MultipartFile upExcel,String fileName ){        System.out.println(upExcel.getOriginalFilename()+"----"+fileName);        try {            String originalFilename = fileName;            if(originalFilename==null||originalFilename==""){//              return "请选择要上传的文件";//              this.renderJson(json(null,1,"请选择要上传的文件"));                this.printFailure(1, "请选择要上传的文件");                return;            }            if(originalFilename.endsWith(".doc")||originalFilename.endsWith(".docx")||                    originalFilename.endsWith(".pdf")||originalFilename.endsWith(".xlsx")||originalFilename.endsWith(".xls")||                    originalFilename.endsWith(".ppt")||originalFilename.endsWith(".pptx")){                String uploadPath = "upload/document"+ "/" + UUID.getUUID() + originalFilename.substring(originalFilename.lastIndexOf("."));    //          String uploadPath = "upload/document"+ "/" + UUID.getUUID()+originalFilename;                    FileStorageHelper.transferFile(upExcel.getInputStream(), uploadPath);                    Document document = new Document();                    String[] split = originalFilename.split("\\.");                    String string = split[0];                    document.setDesn(string);                    document.setUrl(uploadPath);                    String id = UUID.getUUID();                    document.setAuthor(UserTokenHelper.getUserId());                    document.setDocumentID(id);                    documentService.save(document);//                  return id;//                  this.renderJson(json(id,0,"上传文件成功"));                    this.printSuccess(id,"上传文件成功");                    return;            }else{//              return "请选择正确格式的文档";//              this.renderJson(json(null,2,"请选择正确格式的文档"));                this.printFailure(2,"请选择正确格式的文档");                return;            }        } catch (Exception e) {            e.printStackTrace();//          return "上传文件失败";//          this.renderJson(json(null,3,"上传文件失败"));            this.printFailure(3,"上传文件失败");            return;        }    }

下载文件

/**import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.io.OutputStream;import javax.annotation.Resource;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.ResponseBody;        *  下载文件        * @param urldata 文件路径        * @param response        */       @RequestMapping(value = "/download", method = RequestMethod.GET, produces = "application/json")       @ResponseBody    public void download(String urldata,String name,HttpServletResponse response){//         String rootPath = SpringMVCUtil.getRequest().getSession().getServletContext().getRealPath("/");// 获取项目根目录            try {                File file = new File(urldata);// path是根据日志路径和文件名拼接出来的                String filename = file.getName();// 获取文件名称                String[] split = filename.split("\\.");                String string = split[1];                String nameNew = name+"."+string;                InputStream fis = new BufferedInputStream(new FileInputStream(urldata));                byte[] buffer = new byte[fis.available()];                fis.read(buffer);                fis.close();                response.reset();                // 先去掉文件名称中的空格,然后转换编码格式为utf-8,保证不出现乱码,这个文件名称用于浏览器的下载框中自动显示的文件名                //response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.replaceAll(" ", "").getBytes("utf-8"),"iso8859-1"));                response.addHeader("Content-Disposition", "attachment;filename=" + new String(nameNew.replaceAll(" ", "").getBytes("utf-8"),"iso8859-1"));                response.addHeader("Content-Length", "" + file.length());                OutputStream os = new BufferedOutputStream(response.getOutputStream());                response.setContentType("application/octet-stream");                os.write(buffer);// 输出文件                os.flush();                os.close();            } catch (Exception e) {                e.printStackTrace();            }    }

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