categorydaoimpl.java

本系统是网上购物的详细代码

package cn.com.tarena.ecport.dao.impl;

import java.util.List;

import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;

import cn.com.tarena.ecport.common.util.HibernateUtil;
import cn.com.tarena.ecport.dao.ICategoryDAO;
import cn.com.tarena.ecport.exception.ECPortException;
import cn.com.tarena.ecport.pojo.Category;

public class CategoryDAOImpl implements ICategoryDAO {

	public void delete(Category persistencePojo) {
		try {
			HibernateUtil.getSessionFactory().getCurrentSession().delete(persistencePojo);
		} catch (RuntimeException e) {
			throw e;
		}
	}

	@SuppressWarnings("unchecked")
	public List<Category> findByExample(Category instanse) {
		try {
			List<Category> results = HibernateUtil.getSessionFactory().getCurrentSession().createCriteria("Category").add(
							Example.create(instanse)).list();
			return results;
		} catch (RuntimeException e) {
			throw e;
		}
	}

	public Category findById(Long id) {
		try {
			Category category = (Category) HibernateUtil.getSessionFactory().getCurrentSession().get(Category.class, id);
			return category;
		} catch (RuntimeException e) {
			throw e;
		}
	}

	@SuppressWarnings("unchecked")
	public List<Category> findByProperty(String propertyName, Object value) {
		try {
			String hql = "from Category as c where c." + propertyName + "=?";

			Query q = HibernateUtil.getSessionFactory().getCurrentSession().createQuery(hql);
			q.setParameter(0, value);
			return q.list();
		} catch (RuntimeException e) {
			throw e;
		}
	}

	public void lock(Category pojo) {
		try {
			HibernateUtil.getSessionFactory().getCurrentSession().lock(pojo,LockMode.READ);
		} catch (RuntimeException e) {
			throw e;
		}
	}

	public Category merge(Category detachedPojo) {
		try {
			Category category = (Category) HibernateUtil.getSessionFactory().getCurrentSession().merge(detachedPojo);
			return category;
		} catch (RuntimeException e) {
			throw e;
		}
	}

	public void save(Category transientPojo) {
		try {
			HibernateUtil.getSessionFactory().getCurrentSession().save(
					transientPojo);
		} catch (RuntimeException e) {
			throw e;
		}
	}

	public void saveOrUpdate(Category pojo) {
		try {
			HibernateUtil.getSessionFactory().getCurrentSession().saveOrUpdate(pojo);
		} catch (RuntimeException e) {
			throw e;
		}
	}

	@SuppressWarnings("unchecked")
	public List<Category> findAllCategory() throws ECPortException {
		try {
			String hql = "from Category";
			List<Category> results = HibernateUtil.getSessionFactory().getCurrentSession().createQuery(hql).list();
			return results;
		} catch (RuntimeException e) {
			throw e;
		}
	}
}