文件上传插件 uploadify 加快上传文件速度上传速度

最新推荐文章于 2020-04-01 23:00:51 发布

原创最新推荐文章于 2020-04-01 23:00:51 发布 · 211 阅读

CC 4.0 BY-SA版权

本文介绍了一种使用Java Servlet实现文件上传的方法。通过Uploadify类处理文件上传请求，并利用ServletFileUpload解析multipart/form-data类型的HTTP请求。文章详细展示了如何读取上传文件，进行尺寸缩放并保存为新的图片文件。

http://www.uploadify.com/

jsp页面：

<%
Uploadify uploadify = new Uploadify();
uploadify.uplodate(request);
%>

Uploadify文件：

public class Uploadify {
public void uplodate(HttpServletRequest request) throws Exception{
  DiskFileItemFactory factory = new DiskFileItemFactory();
  ServletContext servletContext = request.getServletContext();
  File repository = (File) servletContext.getAttribute(Util.upload());
  factory.setRepository(repository);
  ServletFileUpload upload = new ServletFileUpload(factory);
  List<FileItem> items = upload.parseRequest(request);
  if(items != null && items.size() >0){
   for(int i=0; i< items.size(); i++){
    FileItem fileItem = items.get(i);
    if(!fileItem.isFormField()){
     File file = new File(Util.upload()+"/submit.gif");
     fileItem.write(file);
     Image srcImg = ImageIO.read(file);
     BufferedImage buffImg = null;
     buffImg = new BufferedImage(50, 50, BufferedImage.TYPE_INT_RGB);
     buffImg.getGraphics().drawImage(srcImg.getScaledInstance(50, 50, Image.SCALE_SMOOTH), 0, 0, null);
     ImageIO.write(buffImg, "gif", new File("C:/logs/submit_50x50.gif"));
    }
   }
  }
}
}