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