strust2 和 hibernate的整合------登录的实现

初步认识了struts2，并与hibernate进行整合，完成了一个登录的案例，下面贴源码

1.实体类User

public class User {

private Integer id;
private String uname;
private String upass;

...省略set和get方法

}

2.实体类的映射文件

<class name="www.change.tm.bean.User" table="USERS">
        <id name="id" type="java.lang.Integer">
            <column name="ID" />
            <generator class="native" />
        </id>
        <property name="uname" type="java.lang.String">
            <column name="UNAME" />
        </property>
        <property name="upass" type="java.lang.String">
            <column name="UPASS" />
        </property>
    </class>

3.hibernate.cfg.xml

<session-factory>
                <!-- 配置hibernate的基本信息 -->
         <property name="connection.username">****</property>
         <property name="connection.password">****</property>
         <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
         <property name="connection.url">jdbc:mysql:///hibernate3</property>
         
         <!-- hibernate的基本配置 -->
         <!-- 数据库方言 -->
         <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
    
         <!-- 是否打印sql -->
         <property name="show_sql">true</property>
         <!-- 是否格式化sql -->
         <property name="format_sql">true</property>
         <!-- 生成表的策略 -->
         <property name="hbm2ddl.auto">update</property>
         
          <mapping resource="www/change/tm/bean/User.hbm.xml"/>
          
    </session-factory>

4.action类

package www.change.tm.action;

import java.util.Map;

import org.apache.struts2.ServletActionContext;

import www.change.tm.bean.User;
import www.change.tm.dao.UserDao;
import www.change.tm.dao.UserDaoImpl;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;




public class Login extends ActionSupport{


    //声明dao对象
    UserDao userdao = new UserDaoImpl();
    
    private String uname;
    private String upass;
    
    
    public String login(){
        
        User user = userdao.login(uname, upass);
        
        
        
        
        if (user != null ) {
            // 存入到session会话中
            ServletActionContext.getRequest().getSession()
                    .setAttribute("user", user);
            
                
                return SUCCESS;
                
            
            
        } else {
            ServletActionContext.getRequest().setAttribute("msg", "用户名或者密码");
            return ERROR;
        }
    }
    
    
    public void setUname(String uname) {
        this.uname = uname;
    }




    public void setUpass(String upass) {
        this.upass = upass;
    }

    
    
    
        
        
        
}

5.dao层

5.1 BaseDao

public interface BaseDao {

　　public Session getSession();

} 

5.2   UserDao

public interface UserDao {

    
    /*
     * 登录验证处理
     */
    
    public User login(String uname,String upass);
}

5.3  UserDaoImpl

public class UserDaoImpl extends BaseDaoImpl implements UserDao{

    @Override
    public User login(String uname, String upass) {
        //1.获取session对象
        Session session = getSession();
        
        //2.执行查询 
        Query createQuery = session.createQuery("from User u where u.uname=? and u.upass=?");
        User user = (User)createQuery.setString(0, uname).setString(1, upass).uniqueResult();
        
        /*总的写
        User user =(User) getSession().createQuery("").setString(0, uname).setString(1, upass).uniqueResult();
        */
        
        
        //3.session关闭
        HiberSessionFactory.closeSession();
        
        return user;
    }

}

5.4 BaseDaoImpl

public class BaseDaoImpl implements BaseDao{

    @Override
    public Session getSession() {
        // TODO Auto-generated method stub
        return HibernateControl.getSession();
    }

    

    
}

6.util包里

引入HiberSessionFactory.java文件

package www.change.tm.util;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

/**
 * Configures and provides access to Hibernate sessions, tied to the
 * current thread of execution.  Follows the Thread Local Session
 * pattern, see {@link http://hibernate.org/42.html }.
 */
public class HiberSessionFactory {

    /** 
     * Location of hibernate.cfg.xml file.
     * Location should be on the classpath as Hibernate uses  
     * #resourceAsStream style lookup for its configuration file. 
     * The default classpath location of the hibernate config file is 
     * in the default package. Use #setConfigFile() to update 
     * the location of the configuration file for the current session.   
     */
    private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
    private static org.hibernate.SessionFactory sessionFactory;
    
    private static Configuration configuration = new Configuration();
    private static ServiceRegistry serviceRegistry; 

    static {
        try {
            System.out.println("@@@@@@@@@@@@@@@@@@@@@@@@@@@");
            configuration.configure();
            System.out.println("configuration="+configuration);
            serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
            System.out.println("serviceRegistry="+serviceRegistry);
            sessionFactory = configuration.buildSessionFactory(serviceRegistry);
            System.out.println();
        } catch (Exception e) {
            System.err.println("%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }
    }
    private HiberSessionFactory() {
    }
    
    /**
     * Returns the ThreadLocal Session instance.  Lazy initialize
     * the <code>SessionFactory</code> if needed.
     *
     *  @return Session
     *  @throws HibernateException
     */
    public static Session getSession() throws HibernateException {
        Session session = (Session) threadLocal.get();

        if (session == null || !session.isOpen()) {
            if (sessionFactory == null) {
                rebuildSessionFactory();
            }
            session = (sessionFactory != null) ? sessionFactory.openSession()
                    : null;
            threadLocal.set(session);
        }

        return session;
    }

    /**
     *  Rebuild hibernate session factory
     *
     */
    public static void rebuildSessionFactory() {
        try {
            configuration.configure();
            serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
            sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        } catch (Exception e) {
            System.err.println("%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }
    }

    /**
     *  Close the single hibernate session instance.
     *
     *  @throws HibernateException
     */
    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);

        if (session != null) {
            session.close();
        }
    }

    /**
     *  return session factory
     *
     */
    public static org.hibernate.SessionFactory getSessionFactory() {
        return sessionFactory;
    }
    /**
     *  return hibernate configuration
     *
     */
    public static Configuration getConfiguration() {
        return configuration;
    }

}

 7.数据库