web项目输入正确密码登陆失败

密码输入正确但是依旧显示登陆失败

AddAdminServlet
package servlet;

import java.io.IOException;
import java.io.PrintWriter;

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 bean.Admin;
import dao.AdminDAO;


public class AddAdminServlet extends HttpServlet {


    private static final long serialVersionUID = 1L;

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        doPost(request, response);
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        response.setContentType("text/html; charset=UTF-8");
        request.setCharacterEncoding("utf-8");
        HttpSession session=request.getSession();
        PrintWriter out = response.getWriter();
        
        String username=request.getParameter("username");
        String password=request.getParameter("password");
        int kind =1;
        
        Admin Admin = new Admin();

        Admin.setUsername(username);
        Admin.setPassword(password);
        Admin.setKind(kind);
        
        AdminDAO Admindao=new AdminDAO();
        
        int i = Admindao.addAdmin(Admin);

        
        if(i>0)
        {
            out.print("");
        }
        else
        {
            out.print("");
        }
        
        
        
    }

}

DologinServlet
package servlet;

import java.io.IOException;
import java.io.PrintWriter;

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 bean.Admin;
import dao.AdminDAO;



public class DologinServlet extends HttpServlet {


 private static final long serialVersionUID = 1L;

 public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {

  doPost(request, response);
 }

 public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {

  response.setContentType("text/html; charset=UTF-8");
  request.setCharacterEncoding("utf-8");
  HttpSession session=request.getSession();
  PrintWriter out = response.getWriter();
  
  String username=request.getParameter("username");
  String password=request.getParameter("password");
  
  Admin admin=new Admin();
  
  AdminDAO admindao=new AdminDAO();
  

  admin=admindao.checkAdmin(username, password);
  
  if(admin != null)
  { 
   session.setAttribute("username",username );
   session.setAttribute("userid", admin.getId());
   session.setAttribute("userkind", admin.getKind());
   
   out.print("");   
  }
  else
  {
   out.print("");
  }
  
  
  
 }

}

求大家帮忙解决谢谢