Spring集成Hibernate5_03-HibernateDaoSupport

Hibernate中还提供了HibernateDaoSupport

继承HibernateDaoSupport， 注入SessionFactory

但是报错了， Cannot override the final method from HibernateDaoSupport 我们来看一看HibernateDaoSupport类 持有HibernateTemplate对象，   private HibernateTemplate hibernateTemplate; 两个Set方法都被final修改， 不可以被覆盖。 public final void setSessionFactory(SessionFactory sessionFactory) public final void setHibernateTemplate(HibernateTemplate hibernateTemplate) 解决方法：

二、优化BaseDao (重要) 2.1、抽出一个基础的IBaseDao, 提供公共的方法

package com.chb.spring_hibernate.dao;

import java.util.List;

/**
 * 写入共有的方法
 * @param 
 */
public interface IBaseDao {
    public void add(T t);
    public void delete(int id);
    public void update(T t);
    public T load(int id);
    public List list(String hql, Object[] args);

}

2.2、BaseDao实现IBaseDao的公共方法

package com.chb.spring_hibernate.dao;

import java.lang.reflect.ParameterizedType;
import java.util.List;

import javax.annotation.Resource;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.query.Query;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;

public class BaseDao extends HibernateDaoSupport  implements IBaseDao{

    @Resource(name="sessionFactory")
    public void setSuperSessionFactory(SessionFactory sessionFactory) {
        super.setSessionFactory(sessionFactory);
    }

    //获取Session
    protected Session getSession() {
        return this.getHibernateTemplate().getSessionFactory().getCurrentSession();
    }


    /**
     * 获取泛型的类
     */
    private Class clz;
    @SuppressWarnings("unchecked")
    public Class getClz() {
        if (clz == null) {
            clz = (Class)(((ParameterizedType)(this.getClass().getGenericSuperclass())).getActualTypeArguments()[0]);
        }
        return clz;
    }


    public void add(T t) {
        this.getHibernateTemplate().save(t);
    }

    public void delete(int id) {
        T entity = load(id);
        this.getHibernateTemplate().delete(entity);
    }

    public void update(T t) {
        this.getHibernateTemplate().delete(t);
    }

    public T load(int id) {
        return this.getHibernateTemplate().load(getClz(), id);
    }

    @SuppressWarnings("unchecked")
    public List list(String hql, Object[] args) {
        Query query = this.getSession().createQuery(hql);
        if (args != null) {
            for (int i = 0; i < args.length; i++) {
                query.setParameter(i, args[i]);
            }
        }
        List list = query.list();
        return list;
    }
}

具体的Dao接口只需要继承IBaseDao

package com.chb.spring_hibernate.dao;
import com.chb.spring_hibernate.model.Group;

public interface IGroupDao extends IBaseDao{
     //什么也不要
}



package com.chb.spring_hibernate.dao;


import com.chb.spring_hibernate.model.User;

public  interface IUserDao extends IBaseDao{

}

2.3、具体的Dao只需要继承BaseDao, 实现相应的接口

package com.chb.spring_hibernate.dao;


import org.springframework.stereotype.Repository;

import com.chb.spring_hibernate.model.Group;
@Repository("groupHibernateDao")
public class GroupHibernateDao extends BaseDao implements IGroupDao{


}


package com.chb.spring_hibernate.dao;


import javax.annotation.Resource;

import org.springframework.stereotype.Repository;

import com.chb.spring_hibernate.model.User;
@Repository("userHibernateDao")
public class UserHibernateDao extends BaseDao implements IUserDao{
    private IGroupDao groupHibernateDao;

    @Resource
    public void setGroupHibernateDao(IGroupDao groupHibernateDao) {
        this.groupHibernateDao = groupHibernateDao;
    }
    public IGroupDao getGroupHibernateDao() {
        return groupHibernateDao;
    }



}

上面只介绍了实现公共方法， 如果在UserHibernateDao中向添加一个单独的方法， 应如何做？ 特殊方法， 只需在接口中定义， 在具体类中实现

测试添加 ok

    @org.junit.Test 
    public void testHibernateAdd(){
        ApplicationContext context = new ClassPathXmlApplicationContext("SpringBean.xml");
        IGroupDao groupDao = (IGroupDao)context.getBean("groupHibernateDao");
        IUserDao userDao = (IUserDao) context.getBean("userHibernateDao");

        Group group = new Group();
        group.setGroupName("物理系");
        groupDao.add(group);
        System.out.println(group);

        User user = new User("nd", "xdydfwo", "疯子");
        userDao.add(user, group.getId());
    }