Struts2、Spring4与Hibernate5三大框架整合

一、新建一个web项目，以 Struts2.3.28 为基础

载入一些jsp提示类库（在tomcat中jsp-api,servlet-api,tomcat-api）

载入一个日志类库（commons-logging-1.1.3，文件在struts2的lib目录下）

打开struts2中的apps，解压一个blank的项目，把其中的lib全部复制到项目根目录下的lib中，并部署到web-inf中的lib里

复制web.xml到项目根目录的web-inf下

在src源文件目录下新建一个struts.xml，内容如下：

    
    
    
        
        
            /index.jsp
        
        
            /{1}_{2}_success.jsp
        
    

二、载入Spring4框架（我这里是spring-4.3.2），载入Hibernate5.2.2框架中的所有lib目录下的jar包

三、载入数据库相关类库

commons-dbcp2-2.1.1；commons-pool2-2.4.2；aspectj1.8.9；aspectjweaver-1.8.9；mysql-connector；

四、在src下再新建一个bean.xml

    
    
    
    
        
        
        
        
    
    
        
        
            
                com.wangy.model.User
            
        
        
            
                
                    org.hibernate.dialect.MySQL5Dialect
                
                
                    true
                
            
        
    
    
        
    
    
        
        
    
    
        
            
        
    

五、在src下新建一个包com.wangy，接着在新建几个层次的包，结构如下：

六、内容如下：

UserDAO:

package com.wangy.dao;
import com.wangy.model.User;
/**
 * Created by wangy on 2016/9/16.
 */
public interface UserDAO {
    public void save(User u);
}

UserDAOImpl:

package com.wangy.dao.impl;

import com.wangy.dao.UserDAO;
import com.wangy.model.User;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;

/**
 * Created by wangy on 2016/9/16.
 */

@Component("u")
public class UserDAOImpl implements UserDAO{

    private int daoId;
    private String daoStatus;
    private SessionFactory sessionFactory;

    public int getDaoId() {
        return daoId;
    }

    public void setDaoId(int daoId) {
        this.daoId = daoId;
    }

    public String getDaoStatus() {
        return daoStatus;
    }

    public void setDaoStatus(String daoStatus) {
        this.daoStatus = daoStatus;
    }

    public SessionFactory getSessionFactory() {
        return sessionFactory;
    }
    @Resource(name="mySessionFactory")
    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    @Override
    public void save(User u) {
        Session session = sessionFactory.getCurrentSession();
        session.save(u);
        System.out.println("User is saved!");
    }
}

UserService:

package com.wangy.service;

import com.wangy.dao.UserDAO;
import com.wangy.model.User;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;

/**
 * Created by wangy on 2016/9/16.
 */

@Component("userService")
public class UserService {
    private UserDAO userDAO;

    public UserDAO getUserDAO() {
        return userDAO;
    }
    @Resource(name="u")
    public void setUserDAO(UserDAO userDAO) {
        this.userDAO = userDAO;
    }

    public void add(User u){
        this.userDAO.save(u);
    }
}

HelloAction:

package com.wangy;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.wangy.model.User;
import com.wangy.service.UserService;
import org.apache.struts2.interceptor.RequestAware;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Map;

/**
 * Created by wangy on 2016/9/15.
 */

public class HelloAction extends ActionSupport
        implements ModelDriven,RequestAware {

    private User user = new User();
    private Map request;

    @Override
    public String execute() throws Exception {
        return ERROR;
    }

    public String hello() {
        return SUCCESS;
    }

    public String index() {
        BeanFactory factory = new ClassPathXmlApplicationContext("bean.xml");
        UserService service = (UserService)factory.getBean("userService");
        service.add(user);
        return SUCCESS;
    }

    @Override
    public User getModel() {
        return user;
    }

    @Override
    public void setRequest(Map request) {
        this.request = request;
    }
}

Model-User

package com.wangy.model;

import javax.persistence.Entity;
import javax.persistence.Id;

/**
 * Created by wangy on 2016/9/18.
 */
@Entity
public class User {
    private int id;
    private String username;
    private int age;
    @Id
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

七、层次结构简介

1、struts2负责连接M和V，在其中充当一个C的作用，即Controller控制器

2、业务逻辑放在UserService中，调用实现了UserDAO的UserDAOImpl这个类来操纵数据库

3、数据库的表与Model中的User这个类通过Hibernate这个框架连接在了一起

4、而Spring提供了IoC容器，并通过Aop的方式，通过单例，极大的简化了这些bean的初始化和调用

八、Hibernate模版注入

新建一个bean，注入sessionFactory

新建一个父类DAO

package com.wangy.dao;

import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;

/**
 * Created by wangy on 2016/9/17.
 */
@Component
public class AbstractDAO{
    private HibernateTemplate hibernateTemplate;

    public HibernateTemplate getHibernateTemplate() {
        return hibernateTemplate;
    }
    @Resource
    public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
        this.hibernateTemplate = hibernateTemplate;
    }
}

调用时

        this.getHibernateTemplate().save(u);