memberdaoimpl.java

Struts2+Spring2.5+Hibernate3.2实例教程

package com.albertsong.bitrac.dao;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.transaction.annotation.Transactional;

@Transactional
public class MemberDaoImpl implements MemberDao {
	
	private Log log = LogFactory.getLog(MemberDaoImpl.class);
	
	private EntityManager em;
	
	@PersistenceContext
	public void setEntityManager(EntityManager em) {
		this.em = em;
	}
	
	private EntityManager getEntityManager(){
		return em;
	}

	@SuppressWarnings("unchecked")
	@Override
	public boolean exist(String username,String password) {
		StringBuffer buffer = new StringBuffer("select m from Member m ");
		buffer.append(" where m.username='").append(username).append("'");
		buffer.append(" and m.password=MD5('").append(password).append("')");
		log.debug(buffer.toString());
		Query query = getEntityManager().createQuery(buffer.toString());
		List ls = query.getResultList();
		return ls.size()==1?true:false;
	}

}