@WebServlet("/user-import.action") public class SystemUserImportServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public SystemUserImportServlet() { super(); } private String getFilename(Part p) { String fname = null; // 返回part对象文件部分的content-disposition String header = p.getHeader("Content-disposition"); System.out.println("Header=" + header); // 取子串，返回文件名 fname = header.substring(header.lastIndexOf("=") + 2, header.length() - 1); fname.substring(fname.lastIndexOf("\\") + 1, fname.length()); System.out.println("fname=" + fname); return fname; } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { req.getRequestDispatcher(SystemConstant.view("/user/import")).forward(req, resp); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { req.setCharacterEncoding("UTF-8"); resp.setContentType("text/html;charset=UTF-8"); // 当前工程的路径 String path = this.getServletContext().getRealPath("/"); System.out.println("path=" + path); String number = req.getParameter("number"); javax.servlet.http.Part p = req.getPart("fileName"); String message = ""; // getFilename(p); if (p.getSize() > 1024 * 1024)// 上传文件的大小不能超过1MB { p.delete(); message = "文件大小超过1MB,不能上传!"; } else { // 确定文件上传的位置 path = path + "\\uploadDiretory\\" + number; java.io.File f = new File(path); if (!f.exists()) { // 创建文件夹（目录） f.mkdir(); } System.out.println("path=" + path); // 准备实现上传 // 得到文件名 String fname = getFilename(p); p.write(path + "\\" + fname);//将文件写如目的地 message = "文件上传成功!"; } req.setAttribute("message", message); req.getRequestDispatcher(SystemConstant.view("/user/import")).forward(req, resp); } }