userdao.java

struts hibernate spring实现新闻发布系统含说明文档

package com.ata.wx.java01b.dao;

import java.util.List;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;

/**
 * Data access object (DAO) for domain model class User.
 * 
 * @see com.ata.wx.java01b.dao.User
 * @author MyEclipse Persistence Tools
 */

public class UserDAO extends BaseHibernateDAO {
	private static final Log log = LogFactory.getLog(UserDAO.class);
	// property constants
	public static final String USERNAME = "username";
	public static final String USERPWD = "userpwd";
	public static final String TYPE = "type";
	public static final String EMAIL = "email";

	public void save(User transientInstance) {
		log.debug("saving User instance");
		try {
			getSession().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(User persistentInstance) {
		log.debug("deleting User instance");
		try {
			getSession().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public User findById(java.lang.String id) {
		log.debug("getting User instance with id: " + id);
		try {
			User instance = (User) getSession().get(
					"com.ata.wx.java01b.dao.User", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(User instance) {
		log.debug("finding User instance by example");
		try {
			List results = getSession().createCriteria(
					"com.ata.wx.java01b.dao.User").add(Example.create(instance))
					.list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding User instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from User as model where model."
					+ propertyName + "= ?";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setParameter(0, value);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByUsername(Object username) {
		return findByProperty(USERNAME, username);
	}

	public List findByUserpwd(Object userpwd) {
		return findByProperty(USERPWD, userpwd);
	}

	public List findByType(Object type) {
		return findByProperty(TYPE, type);
	}

	public List findByEmail(Object email) {
		return findByProperty(EMAIL, email);
	}

	public List findAll() {
		log.debug("finding all User instances");
		try {
			String queryString = "from User";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public User merge(User detachedInstance) {
		log.debug("merging User instance");
		try {
			User result = (User) getSession().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(User instance) {
		log.debug("attaching dirty User instance");
		try {
			getSession().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(User instance) {
		log.debug("attaching clean User instance");
		try {
			getSession().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}
	
	public List<User> findByid(String id){
		log.debug("finding by name add pwd");
		try {
			String queryString = "from User as user inner join fetch user.newses inner join fetch user.comments where user.userid=? ";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setParameter(0, id);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}
//	public List findByNameAddPwd(String name,String pwd){
//		log.debug("finding by name add pwd");
//		try {
//			String queryString = "from User as user where user.username=?,user.userpwd=?";
//			Query queryObject = getSession().createQuery(queryString);
//			queryObject.setParameter(0, name);
//			queryObject.setParameter(1, pwd);
//			return queryObject.list();
//		} catch (RuntimeException re) {
//			log.error("find all failed", re);
//			throw re;
//		}
//	}
	public static void main(String[] args){
		UserDAO dao = new UserDAO();
		List<User> list = dao.findByid("4028828e18ba702e0118ba7031080001");
		System.out.println(list.size()+"````````````````");
		
	}
}