logindao.java

用java实现的一个论坛,可以供大家参考

/*******************************************************************\
*                                                                   *
*			   LightningBoard			    *
*                                                                   *
*          http://sourceforge.net/projects/lightningboard/          *
*			                                            *
*	            Copyright (c) 2002 Xiaobo Liu	            *
*                                                                   *
*********************************************************************
*                        LICENSE INFORMATION                        *
*                                                                   *
*  LightningBoard is free software; you can redistribute it and/or  *
*  modify it under the terms of the GNU General Public License as   *
*  published by the Free Software Foundation; either version 2 of   *
*  the License, or any later version.                               *
*                                                                   *
*  We don't charge anything for the use of LightningBoard, we only  *
*  require you to keep the copyright present on your site and in    *
*  the source files.                                                *
*                                                                   *
*  LightningBoard is distributed in the hope that it will be useful,*
*  but without any warranty; without even the implied warranty of   *
*  merchantability or fitness for a particular purpose. See the GNU *
*  General Public License for more details.                         *
*                                                                   *
\*******************************************************************/

package liuxiaobo.lb.dao;

import java.sql.*;
import java.util.*;
import liuxiaobo.db.*;
import liuxiaobo.lb.*;
import liuxiaobo.lb.bean.*;

public class LoginDAO  {
  private DBConnectionManager dbcm = DBConnectionManager.getInstance();

  public LoginBean execute(String u_name)throws ActionException{
    Connection connection=null;
    try {
      LoginBean loginBean=new LoginBean();
      connection=dbcm.getConnection();
      DBAccess dba=new DBAccess(connection);
      String sql="SELECT u_id,u_password,u_email,u_address,u_sign FROM user WHERE u_name='"+u_name+"'";
      ResultSet rs=dba.openSelect(sql);
//check result
      if (!rs.next())
        return null;
      rs.beforeFirst();
      while (rs.next()){
        loginBean.setU_id(rs.getString("u_id"));
        loginBean.setU_name(u_name);
        loginBean.setU_password(rs.getString("u_password"));
        loginBean.setU_email(rs.getString("u_email"));
        loginBean.setU_address(rs.getString("u_address"));
        loginBean.setU_sign(rs.getString("u_sign"));
      }
      rs.close();
      dba.closeSelect();
      return loginBean;
    } catch (Exception ex) {
      throw new ActionException(ex);
    }finally{
      try {
        dbcm.freeConnection(connection);
      } catch (SQLException ex) {
        //
      }
    }
  }
}