Ajax 上传图片并预览的简单实现
(编辑:jimmy 日期: 2024/11/15 浏览:3 次 )
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="/UploadFiles/2021-04-02/jquery-1.12.4.min.js">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。
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