如何使用Commons File Upload Streaming API上传文件

在您的HTML文件中使用它：

<form action="UploadController" enctype="multipart/form-data" method="post">    <input type="file">  </form>

并在

UploadController

doPost

    boolean isMultipart = ServletFileUpload.isMultipartContent(request);    if (isMultipart) {        FileItemFactory factory = new DiskFileItemFactory();        ServletFileUpload upload = new ServletFileUpload(factory);    try {        List items = upload.parseRequest(request);        Iterator iterator = items.iterator();        while (iterator.hasNext()) { FileItem item = (FileItem) iterator.next(); if (!item.isFormField()) {     String fileName = item.getName();     String root = getServletContext().getRealPath("/");     File path = new File(root + "/uploads");     if (!path.exists()) {         boolean status = path.mkdirs();     }     File uploadedFile = new File(path + "/" + fileName);     System.out.println(uploadedFile.getAbsolutePath());     item.write(uploadedFile); }        }    } catch (FileUploadException e) {        e.printStackTrace();    } catch (Exception e) {        e.printStackTrace();    }}