usersdaoimpl.java

来自「spring+struts+hibernate+dwr+jstl做的实例.rar」· Java 代码 · 共 180 行

package com.mytest.dao.impl;

import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.mytest.dao.UsersDAO;
import com.mytest.model.Users;

/**
 * Data access object (DAO) for domain model class Users.
 * 
 * @see com.mytest.model.Users
 * @author MyEclipse Persistence Tools
 */

public class UsersDAOImpl extends HibernateDaoSupport implements UsersDAO {
	private static final Log log = LogFactory.getLog(UsersDAOImpl.class);
	// property constants
	public static final String USERNAME = "username";
	public static final String PASSWORD = "password";

	protected void initDao() {
		// do nothing
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#save(com.mytest.model.Users)
	 */
	public void save(Users transientInstance) {
		log.debug("saving Users instance");
		try {
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#delete(com.mytest.model.Users)
	 */
	public void delete(Users persistentInstance) {
		log.debug("deleting Users instance");
		try {
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#findById(java.lang.Integer)
	 */
	public Users findById(java.lang.Integer id) {
		log.debug("getting Users instance with id: " + id);
		try {
			Users instance = (Users) getHibernateTemplate().get(
					"com.mytest.model.Users", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#findByExample(com.mytest.model.Users)
	 */
	public List findByExample(Users instance) {
		log.debug("finding Users instance by example");
		try {
			List results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#findByProperty(java.lang.String, java.lang.Object)
	 */
	public List findByProperty(String propertyName, Object value) {
		log.debug("finding Users instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Users as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#findByUsername(java.lang.Object)
	 */
	public List findByUsername(Object username) {
		return findByProperty(USERNAME, username);
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#findByPassword(java.lang.Object)
	 */
	public List findByPassword(Object password) {
		return findByProperty(PASSWORD, password);
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#findAll()
	 */
	public List findAll() {
		log.debug("finding all Users instances");
		try {
			String queryString = "from Users";
			return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#merge(com.mytest.model.Users)
	 */
	public Users merge(Users detachedInstance) {
		log.debug("merging Users instance");
		try {
			Users result = (Users) getHibernateTemplate().merge(
					detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#attachDirty(com.mytest.model.Users)
	 */
	public void attachDirty(Users instance) {
		log.debug("attaching dirty Users instance");
		try {
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	/* (non-Javadoc)
	 * @see com.mytest.dao.impl.UsersDAO#attachClean(com.mytest.model.Users)
	 */
	public void attachClean(Users instance) {
		log.debug("attaching clean Users instance");
		try {
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public static UsersDAO getFromApplicationContext(ApplicationContext ctx) {
		return (UsersDAO) ctx.getBean("UsersDAO");
	}
}