ajax非同步上傳圖片及其他表單項
阿新 • • 發佈：2019-02-09
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> <script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery-1.8.3.js"></script> </head> <script type="text/javascript"> function upload() { var formData =new FormData($("#form")[0]); $.ajax({ url:'${pageContext.request.contextPath }/UploadServlet', data:formData, type:'post', processData:false, contentType:false, success:function(data){ alert("成功了！") } }); } </script> <body> <form id="form" id="form"> 檔名：<input id="name" name="name" type="text" /><br/> 上傳檔案:<input type="file" name="file"/><br/> <input type="button" value="提交" onclick="upload()"/><br/> </form> </body> </html>
try { //接受上傳檔案 //1、建立磁碟檔案項工廠 DiskFileItemFactory factory = new DiskFileItemFactory(); //2、建立檔案上傳的核心類 ServletFileUpload upload = new ServletFileUpload(factory); //3、解析request---獲得檔案項集合 List<FileItem> parseRequest = upload.parseRequest(request); //4、遍歷檔案項集合 for(FileItem item : parseRequest){ //5、判斷普通表單項/檔案上傳項 boolean formField = item.isFormField();//是否是一個普通表單項 if(formField){ //普通表單項 System.out.println(item.getFieldName() + ":" + item.getString()); } else{ //檔案上傳項 //我們使用uuid生成檔名以防止亂碼 String fileName = UUID.randomUUID().toString().replace("-","").trim(); fileName = fileName + ".jpg"; //獲得上傳檔案的內容 InputStream in = item.getInputStream(); //將in中的資料拷貝伺服器上 String path = this.getServletContext().getRealPath("products"); OutputStream out = new FileOutputStream(path+"/"+fileName); int len = 0; byte[] buffer = new byte[1024]; while((len=in.read(buffer))>0){ out.write(buffer, 0, len); } in.close(); out.close(); } } } catch (FileUploadException e) { e.printStackTrace(); }