u01tblogtypebo.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.TBlog;
import cn.hope.mana.pojo.TBlogtype;
import cn.hope.mana.pojo.dao.TBlogtypeDAO;

public class U01TBlogtypeBO {
	Logger log = Logger.getLogger(U01TBlogtypeBO.class.getName());
	
	private TBlogtypeDAO blogtypeDAO = new TBlogtypeDAO();
	public List search() throws HibernateException {
		try {			
			return blogtypeDAO.search();
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
	public TBlogtype search(Integer bId) throws HibernateException {
		try {			
			return blogtypeDAO.search(bId);
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
	public boolean insert(TBlogtype tBlogtype) throws HibernateException {
		int count = 0;
		String tTitle = tBlogtype.getTTitle().trim();
		try {
			count = blogtypeDAO.search(tTitle);
			if (count == 0) {
				tBlogtype.setFlag("0");
				tBlogtype.setTTitle(tTitle);
				blogtypeDAO.insert(tBlogtype);
				return true;
			}
			return false;
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
	public int delete(TBlogtype tBlogtype) throws HibernateException {
		Integer tbId = tBlogtype.getTTypeid();
		Integer moveId = tBlogtype.getMoveId();
		int flag = 0;
		List listB = null;
		TBlogtype moveType = new TBlogtype();
		try {							
				listB = blogtypeDAO.searchBlog(tbId);					
				if (listB.size()>0){
					if (moveId.equals(new Integer(0))) {//当分类中有blog时，必须选择移动分类
						flag = 2;
						return flag;
					}
					if (tbId.equals(moveId)) {//要删除的分类和移动分类不能相同
						flag = 1;
						return flag;
					}					
					moveType = blogtypeDAO.search(moveId);
					Iterator it = listB.iterator();
					while(it.hasNext()){//先将分类中blog移动到选择的移动分类
						TBlog tBlog = (TBlog) it.next();
						tBlog.setTBlogtype(moveType);
						blogtypeDAO.update(tBlog);
					}
				}					
				TBlogtype btype = blogtypeDAO.search(tbId);
				btype.setFlag("1");
				blogtypeDAO.delete(btype);//删除分类
			return flag;
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
	public boolean update(TBlogtype tBlogtype) throws HibernateException {
		int count = 0;
		String tTitle = tBlogtype.getTTitle().trim();
		try {
			count = blogtypeDAO.search(tTitle);
			if (count == 0) {
				tBlogtype.setFlag("0");
				tBlogtype.setTTitle(tTitle);
				blogtypeDAO.update(tBlogtype);
				return true;
			}
			return false;
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
}