u01mntypebo.java

持久层hibernate技术使用的一个例子

package cn.hope.mana.bo;

import java.util.Iterator;
import java.util.List;

import net.sf.hibernate.HibernateException;

import org.apache.log4j.Logger;

import cn.hope.mana.pojo.MNounce;
import cn.hope.mana.pojo.MNtype;
import cn.hope.mana.pojo.dao.MNounceDAO;
import cn.hope.mana.pojo.dao.MNtypeDAO;

public class U01MNtypeBO {
	Logger log = Logger.getLogger(U01MNtypeBO.class.getName());
	
	private MNtypeDAO ntypeDAO = new MNtypeDAO();
	
	public List searchAll() throws HibernateException{
		try{
			return ntypeDAO.searchAll();
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		}
	}
	/**
	 * 查询数据方法
	 * 
	 * @param  
	 * @return MHtype
	 * @throws HibernateException
	 */
	public MNtype find(Integer typeId) throws HibernateException {
		try {
			return ntypeDAO.load(typeId);
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		}
	}
	/**
	 * 修改数据方法
	 * 
	 * @param  MHtype
	 * @return void
	 * @throws HibernateException
	 */
	public boolean update(MNtype mNtype) throws HibernateException {
		mNtype.setNType(mNtype.getNType().trim());
		int count = 0;
		try {		
			count = ntypeDAO.searchByName(mNtype.getNType());
			if (count == 0) {
				ntypeDAO.update(mNtype);
				return true;
			}
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		}
		return false;
	}
	/**
	 * 删除数据方法
	 * 
	 * @param  Integer
	 * @return void
	 * @throws HibernateException
	 */
	public void delete(Integer typeId) throws HibernateException {
		MNounceDAO mnDAO = new MNounceDAO();
		MNtype mNtype = new MNtype();
		List list = null;
		try {			
			mNtype = ntypeDAO.load(typeId);
			/**先删除公告**/
			list = mnDAO.search(mNtype);
			Iterator it = list.iterator();
			while (it.hasNext()){
				MNounce mn = (MNounce) it.next();
				mn.setFlag("1");
				mnDAO.delete(mn);
			}
			/*********/
			mNtype.setFlag("1");
			ntypeDAO.update(mNtype);
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		}
	}
}