模拟一个银行ODS中间件系统，实现来自ATM的客户请求分发到远程的其所属银行，交易完毕后将结果返回至ATM用户端。

package Server2; import java.io.IOException; import java.rmi.Naming; import java.sql.ResultSet; import java.sql.SQLException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import DB.JDBC; import entity.User; @SuppressWarnings("serial") public class Enterpassword extends HttpServlet{ JDBC jdbc = new JDBC(); protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException,IOException{ doGet(req,resp); } @Override public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { HttpSession session = req.getSession(); User user = new User(); String account = req.getParameter("account"); String password = req.getParameter("password"); user.setPassword(password); user.setAccount(account); System.out.println(account); System.out.println(password); if((account != null)&&(password != null)){ //1 开头为本地银行 if(account.charAt(0) == '1'){ User reuser = _user(jdbc.query("select * from localatm where account=?", account)); if(password.equals(reuser.getPassword())){ System.out.println("登录本地银行成功"); session.setAttribute("user", reuser); resp.sendRedirect("chose.jsp"); return; } }else{ try{ HelloInterface hello = (HelloInterface) Naming.lookup("rmi://10.129.154.117：1099/Hello"); System.out.println("~~~~~~~~~"); User reuser = hello.enterpassword(user); System.out.println("登录外地银行成功"); session.setAttribute("user", reuser); resp.sendRedirect("chose.jsp"); return; } catch (Exception e){ System.out.println("HelloClient exception: " + e); } } } String login_fail = "enterpassword.jsp"; resp.sendRedirect(login_fail); return; } public User _user(ResultSet rs){ User user=null; try{ if(rs.next()){ user = new User(); user.setAccount(rs.getString("account")); user.setPassword(rs.getString("password")); user.setPrice(rs.getInt("price")); user.setName(rs.getString("name")); } } catch(SQLException e){ e.printStackTrace(); }finally{ //jdbc.closeAll(); } return user; } }