folder is disappear after server restart

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Java

struts

Hi..


In my web application user can upload the documents(abstracts) for this i have created one folder for storing the documents. Presently am storing the path in DB and files in a particular folder(this folder will be created in server). But my problem is, when i restart the server the folder is not visible. files are not opening. what is the problem in my code.. Below is my java code.

public class PostAbstractDao {

	public static PostAbstract insert(PostAbstract bean) {

		try {

			PathReturn path = new PathReturn();
			String realpath = path.getPath();// it will return the path of the myeclipse server(E:\MyeclipseApps\.metadata\.me_tcat\webapps\MedicalConference)

			System.out.println("path is" + realpath);

			int gid = bean.getGid();
			String email = bean.getEmail();
			FormFile file = bean.getFile();

			// Get the servers upload directory real path name

			String filePath = realpath + "abstracts";
			String dbpath = "D:\\abstracts\\" + file.getFileName();
			// create the upload folder if not exists
			File folder = new File(filePath);
			if (!folder.exists()) {
				folder.mkdirs();
			}

			String fileName = file.getFileName();

			if (!("").equals(fileName)) {

				System.out.println("Server path:" + filePath);
				File newFile = new File(filePath, fileName);

				if (!newFile.exists()) {
					FileOutputStream fos = new FileOutputStream(newFile);
					fos.write(file.getFileData());
					fos.flush();
					fos.close();
				}
			}
			Connection con = (Connection) new DB2Connection()
					.getDatabaseConnection();

			String sql = "insert into user_posts(gid,posts,email) values(?,?,?) ";

			PreparedStatement ps = con.prepareStatement(sql);
			ps.setInt(1, gid);

			ps.setString(2, dbpath);
			ps.setString(3, email);

			int ok = ps.executeUpdate();
			if (ok > 0) {

				bean.setValid(true);
			}

		} catch (SQLException e) {

			e.printStackTrace();

		} catch (NullPointerException nl) {
			nl.printStackTrace();
		}

		catch (Exception ex) {

			ex.printStackTrace();

		}

		return bean;

	}

}