public class FileUploadServlet extends HttpServlet { private static final long serialVersionUID = 1L; private ServletFileUpload upload; private final long MAXSize = 4194304*2L;//4*2MB private String filedir=null; /** * @see HttpServlet#HttpServlet() */ public FileUploadServlet() { super(); // TODO Auto-generated constructor stub } /** * 设置文件上传的初始化信息 * @see Servlet#init(ServletConfig) */ public void init(ServletConfig config) throws ServletException { FileItemFactory factory = new DiskFileItemFactory();// Create a factory for disk-based file items this.upload = new ServletFileUpload(factory);// Create a new file upload handler this.upload.setSizeMax(this.MAXSize);// Set overall request size constraint 4194304 filedir=config.getServletContext().getRealPath("images"); System.out.println("filedir="+filedir); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ @SuppressWarnings("unchecked") protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub PrintWriter out=response.getWriter(); try { List<FileItem> items = this.upload.parseRequest(request); if(items!=null && !items.isEmpty()){ for (FileItem fileItem : items) { String filename=fileItem.getName(); String filepath=filedir+File.separator+filename; System.out.println("文件保存路径为:"+filepath); File file=new File(filepath); InputStream inputSteam=fileItem.getInputStream(); BufferedInputStream fis=new BufferedInputStream(inputSteam); FileOutputStream fos=new FileOutputStream(file); int f; while((f=fis.read())!=-1) { fos.write(f); } fos.flush(); fos.close(); fis.close(); inputSteam.close(); System.out.println("文件:"+filename+"上传成功!"); } } System.out.println("上传文件成功!"); out.write("上传文件成功!"); } catch (FileUploadException e) { e.printStackTrace(); out.write("上传文件失败:"+e.getMessage()); } } }
时间: 2024-11-05 11:48:16