文件上传下载

文件上传action

private List<File> file;//文件列表private List<String> fileFileName;//文件名称private List<String> fileContentType;//文件类型@Action(value = "saveAttaFile")public void saveAttaFile(){    String address = (String) context.getAttribute("File_UPLOAD_URL");//可配置的文件路径    //以日期年月为文件夹保存文件    Calendar cal = Calendar.getInstance();    int year = cal.get(Calendar.YEAR);    int month = cal.get(Calendar.MONTH )+1;     String filename = year+"-"+month;    String path = address + "\\\\file\\\\" + filename;    String uuid="";    if(file != null){        for(int i=0;i<file.size();i++){            try {                String attaName = mesAttachmentService.saveAttachmentFile(path, file.get(i), fileFileName.get(i));                                                  } catch (Exception e) {                    e.printStackTrace();                }            }        }        this.printText(uuid);    }

文件上传方法

public String saveAttachmentFile(String path, File file, String fileName) throws Exception {    // TODO Auto-generated method stub    if(file!=null){        InputStream in = new FileInputStream(file);        String name = new Date().getTime()+""+Math.round(Math.random()*100);//数据库中保存的文件名称        File folder = new File(path);        if (!folder.exists()) {            folder.mkdirs();        }        String str = fileName.substring(fileName.lastIndexOf("."));        String attaName = name+str;//通过时间戳组文件名        File uploadFile = new File(path,attaName);        OutputStream out = new FileOutputStream(uploadFile);        byte[] buffer = new byte[1024 * 1024];        int length;        while ((length = in.read(buffer)) > 0) {            out.write(buffer, 0, length);        }        in.close();        out.close();        return attaName;    }    return null;}

下载文件的方法

//数据库有专门表保存文件信息，前台通过传递文件id获取详细信息，并下载文件。public void downMesAttaFile(){    String address = (String) context.getAttribute("File_UPLOAD_URL");//可配置的路径    String attaId = request.getParameter("attaid");//文件id    MesAttachment mesAtta;//文件实体类    try {        mesAtta = this.ptBaseService.get(MesAttachment.class, attaId);        if(StringUtil.isNotBlank(mesAtta)){            HttpServletResponse response = ServletActionContext.getResponse();            ServletContext context = ServletActionContext.getServletContext();            String agent = request.getHeader("User-Agent").toUpperCase();            String downName = "";            //部分浏览器下载文件弹窗文件名乱码，进行编码            if (agent.indexOf("MSIE") > 0|| ( null != agent && -1 != agent.indexOf(") LIKE GECKO"))) {                downName = URLEncoder.encode(mesAtta.getAttaName(), "UTF-8");            } else {                downName = new String(mesAtta.getAttaName().getBytes("UTF-8"), "ISO8859-1");            }            // + URLEncoder.encode(mesAtta.getAttaName(), "utf-8")            response.setHeader("content-disposition", "attachment;filename=" + downName);            String realPath = context.getRealPath("/WEB-INF/download");            InputStream is = new FileInputStream(address + mesAtta.getAttaUrl());            OutputStream os = response.getOutputStream();            byte[] b = new byte[1024];            int len = 0;            while ((len = is.read(b)) > 0) {                os.write(b, 0, len);            }            is.close();            os.close();        }    } catch (Exception e) {        // TODO Auto-generated catch block        e.printStackTrace();    }}

前台页面下载

/**前端下载文件,非ajax无刷新页面下载，可以在弹窗片段页面使用*/function downFile(id){       if (typeof (downFile.iframe) == "undefined")       {           var iframe = document.createElement("iframe");           downFile.iframe = iframe;           document.body.appendChild(downFile.iframe);       }       downFile.iframe.src = "action"+id;       downFile.iframe.style.display = "none";  }