Struts2+Hibernate简单整合

1. 框架整合,只是将不同的框架负责不同的内容。如struts2依旧是负责控制器Controller，而Hibernate及Mybitas负责的是DAO持久层对数据进行操作。
2. 步骤
   
   • 编写DAO

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O 实体并添加注解
R类
注册表
API测试

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• Service（Tx事务）

• Struts2
  包括Action:
  1.Action 的类
  2.成员变量收集数据
  3.业务对象调用
  4.页面跳转
  Struts.xml文件的配置.

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新建一个s2h项目进行Struts2和Hibernate的简单整合实例.
1. 导入项目所必须的jar包如下图:

其中包含了Struts2以及Hibernate的基础jar包和MySQL的jar,如果不导入mysql的jar则无法与数据库进行数据交换.
2. 在src下新建entity包建User类,设定属性并添加注解代码如下

package entity;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.Table;import org.hibernate.annotations.GenericGenerator;/** * import javax.persistence.Entity;导入的这个包是持久化作用 * 这里使用注解将类实现持久化 *@author xpengfei *@creat  10:39:30 AM   Aug 24, 2017 */@Entity@Table(name="t_user")public class User {    @Id    @GenericGenerator(name="user_pk",strategy="increment")    @GeneratedValue(generator="user_pk")    private Integer id;    private String name;    private String password;    public User(Integer id, String name, String password) {        super();        this.id = id;        this.name = name;        this.password = password;    }    public User() {    }    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    @Override    public String toString() {        return "User [id=" + id + ", name=" + name + ", password=" + password                + "]";    }}

1. 导入hibernate.cfg.xml进行相关配置并进行User类的注册

<!DOCTYPE hibernate-configuration PUBLIC    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration>    <session-factory >        <property name="connection.username">root</property>        <property name="connection.password">mysql</property>        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>        <property name="connection.url">jdbc:mysql:///s2h?useUnicode=true&amp;characterEncoding=UTF-8</property>        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>        <property name="show_sql">true</property>        <property name="format_sql">true</property>        <property name="hbm2ddl.auto">update</property>        <!-- 这里是 当调用时hibernate将session绑定到当前线程，        事务结束后hibernate将session从当前线程中释放并且关闭session-->        <property name="hibernate.current_session_context_class">thread</property>        <!-- 类的注册 -->        <mapping class="entity.User"/>    </session-factory></hibernate-configuration>

1. 建立init.sql文件编写建表语句

,create table t_user(    id integer primary key,    name varchar(12),    password varchar(12));

1. 创建util包,新建HibernateUtil.Java作为SessionFactory获取session的工具类

package util;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;/** *@author xpengfei *@creat  10:38:37 AM   Aug 24, 2017 */public class HibernateUtil {    private static SessionFactory sessionFactory;    static{        Configuration cfg=new Configuration();        cfg.configure();        sessionFactory=cfg.buildSessionFactory();    }    public static Session openSession(){        return sessionFactory.openSession();    }    public static Session getCurrentSession(){        System.out.println("获取session");        return sessionFactory.getCurrentSession();    }}

1. 新建dao包,创建UserDAO接口类以及UserDAOImpl接口实现类

package dao;import entity.User;/** *@author xpengfei *@creat  10:57:46 AM   Aug 24, 2017 */public interface UserDAO {    public void save(User user);}

package dao;import org.hibernate.Session;import util.HibernateUtil;import entity.User;/** *@author xpengfei *@creat  10:58:44 AM   Aug 24, 2017 */public class UserDAOImpl implements UserDAO{    @Override    public void save(User user) {        //通过工具类获取session        Session session=HibernateUtil.getCurrentSession();        session.save(user);    }}

1. 新建service包,创建UserService接口类以及UserServiceImpl实现类

package service;import entity.User;/** *@author xpengfei *@creat  11:15:57 AM   Aug 24, 2017 */public interface UserService {    public void register(User user);}

package service;import org.hibernate.Transaction;import util.HibernateUtil;import dao.UserDAO;import dao.UserDAOImpl;import entity.User;/** *@author xpengfei *@creat  11:16:57 AM   Aug 24, 2017 */public class UserServiceImpl implements UserService{    private UserDAO userDAO=(UserDAO) new UserDAOImpl();    @Override    public void register(User user) {        Transaction tx=null;        try {            //开启事务            tx=HibernateUtil.getCurrentSession().getTransaction();            tx.begin();            userDAO.save(user);            System.out.println("UserServiceImpl"+user);            tx.commit();//提交事务        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();            tx.rollback();        }    }}

1. 编写Action,新建action包,创建UserAction类

package action;import service.UserService;import service.UserServiceImpl;import com.opensymphony.xwork2.Action;import entity.User;/** *@author xpengfei *@creat  11:22:03 AM   Aug 24, 2017 */public class UserAction implements Action{    private User user;    private UserService us=(UserService) new UserServiceImpl();    public User getUser() {        return user;    }    public void setUser(User user) {        this.user = user;    }    @Override    public String execute() throws Exception {        us.register(user);        return "success";    }}

1. 新建struts.xml进行相关action的配置
2. web.xml中进行struts2的核心控制器的配置
3. 新建View目录并在其下创建reg.jsp以及result.jsp做简单的测试
4. 项目根级目录
5. 运行项目效果如下:
   
   注册成功后
   
   数据库数据表中的数据:
   
   数据存储成功;
   至此,struts2+Hibernate简单的注册整合完成.