smartupload.jar
使用 页面部分必须使用POST提价
表单属性必须有enctype="multipart/form-data"
<form action="toUpload" method="post" enctype="multipart/form-data" > 书名:<input type="text"/><br> 图片:<input type="file"/><br> <input type="submit" value="提交"/> </form> 文件上传 public void upload(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { //上传文件 SmartUpload su=new SmartUpload(); //获得pageContext对象 JspFactory factory=JspFactory.getDefaultFactory(); PageContext pagecontext=factory.getPageContext(this, request,response, null,false,1024,true); su.initialize(pagecontext); su.setCharset("utf-8"); //实现文件数据的上传 su.upload(); File file = su.getFiles().getFile(0); //得到文件的基本信息 String filename=file.getFileName(); String type=file.getContentType(); String url="uploadfile/"+filename; //将上传文件保存到指定目录 file.saveAs(url, SmartUpload.SAVE_VIRTUAL); } catch (SmartUploadException e) { e.printStackTrace(); } }
此时如果表单中有其他数据时，不能通过request直接获取，需要通过SmartUpload对象获取String name=su.getRequest().getParameter("bookName");并且该代码要在SmartUpload操作完成后添加
解决乱码:
new String(name.getBytes("GBK"),"utf-8")
文件下载 String name=request.getParameter("filename"); String url="uploadfile/"+name; //将响应的内容设置为通用的二进制流 response.setContentType("application/octet-stream"); //attachment 告诉浏览器以附件的方式下载文件(弹出下载框) name=URLEncoder.encode(name,"utf-8"); response.addHeader("Content-Disposition","attachment;filename="+name); request.getRequestDispatcher(url).forward(request, response); //清空缓冲区:将服务端缓冲区的文件内容,立即权并不传送给客户端 response.flushBuffer();