u01csubjectbo.java

持久层hibernate技术使用的一个例子

package cn.hope.mana.bo;

import java.util.List;

import net.sf.hibernate.HibernateException;

import org.apache.log4j.Logger;

import cn.hope.mana.pojo.CSubject;
import cn.hope.mana.pojo.dao.CSubjectDAO;

public class U01CSubjectBO {
	Logger log = Logger.getLogger(U01CSubjectBO.class.getName());
	
	private CSubjectDAO subjectDAO = new CSubjectDAO();
	public List search() throws HibernateException {
		try {			
			return subjectDAO.search();
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
	public CSubject search(Integer sSid) throws HibernateException {
		try {			
			return subjectDAO.search(sSid);
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
	public boolean insert(CSubject cSubject) throws HibernateException {
		int count = 0;
		String sSbName = cSubject.getSSbname().trim();
		try {
			count = subjectDAO.search(sSbName);
			if (count == 0) {
				cSubject.setFlag("0");
				cSubject.setSSbname(sSbName);
				subjectDAO.insert(cSubject);
				return true;
			}
			return false;
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
	public boolean delete(CSubject cSubject) throws HibernateException {
		String[] sids = cSubject.getSIds();
		try {
			for (int i = 0 ; i < sids.length ; i ++) {
				Integer sSid = new Integer(sids[i]);
				List listHomework = subjectDAO.searchHomework(sSid);
				List listTeach = subjectDAO.searchTeach(sSid);
				List listTest = subjectDAO.searchTInfo(sSid);
				List listQuestion = subjectDAO.searchQuestion(sSid);
				if (listHomework.size()>0 || listTeach.size()>0 || listTest.size()>0 || listQuestion.size()>0){
					return false;
				}
			}
			for (int i = 0 ; i < sids.length ; i ++) {
				CSubject cs = subjectDAO.search(new Integer(sids[i]));
				cs.setFlag("1");
				subjectDAO.delete(cs);
			}
			return true;
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
	public boolean update(CSubject cSubject) throws HibernateException {
		int count = 0;
		String sSbname = cSubject.getSSbname().trim();
		try {
			count = subjectDAO.search(sSbname);
			if (count == 0) {
				cSubject.setFlag("0");
				cSubject.setSSbname(sSbname);
				subjectDAO.update(cSubject);
				return true;
			}
			return false;
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
}