loginbean.java

一个基于BMP的EJB例子

package zhxt.login.ejb;

import java.sql.Connection;
import java.sql.DriverManager;

import javax.ejb.*;

/*************************************************

  Copyright (C), 2002-2004, 易新科技有限公司
  File name:      LoginBean.java
  Author:zcl      Version:0.1        Date: 2004.3.13
  Description:    完成用户版本和用户登录的实体Bean（BMP），使用了LoginDAO,主要实现对用户的认证功能                   
  Others: 
          
  Function List:  
    1. 
    2. 
  History:       
    1. Date:

       Author:

       Modification:
*************************************************/

public class LoginBean implements javax.ejb.EntityBean {
	private javax.ejb.EntityContext myEntityCtx;
	private String username; /*用户帐号*/
	private String password;/*用户密码*/	
	private String paw;
	private LoginDAO DAO = new LoginDAO();/*数据库访问DAO成员变量*/

	/**
	 * ejbActivate
	 */
	public void ejbActivate() {
	}
	/**
	 * ejbLoad
	 */
	public void ejbLoad() {

	}
	/**
	 * ejbPassivate
	 */
	public void ejbPassivate() {
	}
	/**
	 * ejbRemove
	 */
	public void ejbRemove() throws javax.ejb.RemoveException {
	}
	/**
	 * ejbStore
	 */
	public void ejbStore() {
	}
	/**
	 * getEntityContext
	 */
	public javax.ejb.EntityContext getEntityContext() {
		return myEntityCtx;
	}
	/**
	 * setEntityContext
	 */
	public void setEntityContext(javax.ejb.EntityContext ctx) {
		myEntityCtx = ctx;
	}
	/**
	 * unsetEntityContext
	 */
	public void unsetEntityContext() {
		myEntityCtx = null;
	}
	/**
	 * ejbCreate
	 */
	public zhxt.login.ejb.LoginKey ejbCreate()
		throws javax.ejb.CreateException {
		return null;
	}
	/**
	 * ejbPostCreate
	 */
	public void ejbPostCreate() throws javax.ejb.CreateException {
	}
	/**
	 * ejbFindByPrimaryKey
	 */
    public zhxt.login.ejb.LoginKey ejbFindByPrimaryKey(
		zhxt.login.ejb.LoginKey primaryKey)
		throws javax.ejb.FinderException {
		return null;
	}
		
	/**
	 * 带用户帐号和密码的构造函数实现.
	 * username:用户帐号；password:用户密码
	 */ 	
	public LoginKey ejbCreate(String username,String password)
	throws javax.ejb.CreateException
	{	
		this.paw = password;
		this.username = username;
		return new LoginKey("",false);
		
	}	
	public void ejbPostCreate(String username,String password)
	throws javax.ejb.CreateException{
	};
	
	/**
	 * 根据用户编码返回一个主要对象
	 */
  	public LoginKey ejbFindByUsername(String username) throws FinderException
	{	
		return new LoginKey(username,false);			
	}
		
	/**
	 *判断用户认证函数。
	 *主要实现对用户帐号和密码的认证 
	 * 返回值：为布尔变量。true：认证成功；false:认证失败。
	 */	 
    public boolean isPass(String uname,String passwd)
	{	 	
		Connection conn=null;
		try
	    {  
		    Class.forName ("oracle.jdbc.driver.OracleDriver");
            conn = DriverManager.getConnection("jdbc:oracle:thin:@192.168.0.166:1521:ORCL","zhxt","zhxt");
	       
	        DAO.setConn( conn);
	        password = DAO.getPassByAccount(uname);
	        System.out.println(password+" " +passwd);
	        
	        if (password.equals(passwd))
	        { 
				conn.close();
	            return true;
	           
	        }
	        else
	        { 
				conn.close();
	        	return false;
	        	
	        }       
		}
		catch(Exception e)
		{
		    throw new EJBException("ejbCreate:(errir80888)" + e.toString());	
		}  
	 };	 
	 	 
	/**
	 * Returns the password.
	 * @return String
	 */
	public String getPassword() {
		return password;
	}

	/**
	 * Returns the username.
	 * @return String
	 */
	public String getUsername() {
		return username;
	}
	/**
	 * Sets the password.
	 * @param password The password to set
	 */
	public void setPassword(String password) {
		this.password = password;
	}
	/**
	 * Sets the username.
	 * @param username The username to set
	 */
	public void setUsername(String username) {
		this.username = username;
	}

}