Ajax 上传图片并预览的简单实现
发布时间:2020-12-15 23:04:14 所属栏目:百科 来源:网络整理
导读:1. 直接上最简单的 一种 ajax 异步上传图片,并预览 html: !DOCTYPE htmlhtmlheadmeta http-equiv="Content-Type" content="text/html; charset=UTF-8"title图片上传 | cookie/title/headbody file: input type="file" id="images" name="image" /brbr desc
1. 直接上最简单的 一种 ajax 异步上传图片,并预览 html: <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>图片上传 | cookie</title> </head> <body> file: <input type="file" id="images" name="image" /><br><br> desc: <input type="text" id="desc" name="desc" /><br><br> <input type="button" value="upload" onclick="upload();"> <div class="images"></div> <script type="text/javascript" src="js/jquery-1.12.4.min.js"></script> <script type="text/javascript" src="js/upload.js"></script> <script type="text/javascript"> function upload() { $.ajaxFileUpload({ url : 'upload.htm',fileElementId : 'images',dataType : 'json',data : {desc : $("#desc").val()},success : function(data) { var html = $(".images").html(); html += '<img width="100" height="100" src="/HotelManager/upload/' + data.url + '">' $(".images").html(html); } }) return false; } </script> </body> </html> servlet: protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException { DiskFileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); String path = request.getServletContext().getRealPath("/upload"); String name = null; try { List<FileItem> items = upload.parseRequest(request); for (FileItem item : items) { if(item.isFormField()){ System.out.println(item.getFieldName() + ": " + item.getString()); } else { name = item.getName(); item.write(new File(path,name)); } } PrintWriter out = response.getWriter(); out.print("{"); out.print("url:"" + name +"""); out.print("}"); } catch (Exception e) { e.printStackTrace(); } } 2. 这里会 用到一个 ajaxupload.js, 网上多得很。 以上就是小编为大家带来的Ajax 上传图片并预览的简单实现的全部内容了,希望对大家有所帮助,多多支持编程小技巧~ (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |