文件上传
 
  UserName:

  File1:

  File2:

  
 

@WebServlet("/ajaxUpload")
@MultipartConfig //开启上传功能
/**
 * @author hh
 */
public class FileUploadServlet extends HttpServlet {
 @Override
 protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
  req.setCharacterEncoding("utf-8");
  //获取用户名
  String userName=req.getParameter("userName");
  //获取年龄
  String age=req.getParameter("age");
  System.out.println(userName);
  System.out.println(age);
  //获取项目部署的绝对路径
  String uploadPath=req.getServletContext().getRealPath("/photos");
  //构建上传的文件夹
  File dir=new File(uploadPath);
  if(!dir.exists()){
   dir.mkdir();
  }
  //获取所有上传的Part
  Collection parts= req.getParts();
  for (Part part:parts) {
   //判断上传的类型是否为空，如果为空则不执行上传
   if(part.getContentType()!=null){
    //获取文件名
    String fileName=part.getSubmittedFileName();
    //执行上传
    part.write(uploadPath+File.separator+fileName);
   }
  }
  //响应上传成功
  resp.getWriter().println("uplaod success");
 }
}