u01sblogtypebo.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.SBlog;
import cn.hope.mana.pojo.SBlogtype;
import cn.hope.mana.pojo.dao.SBlogtypeDAO;

public class U01SBlogtypeBO {
Logger log = Logger.getLogger(U01SBlogtypeBO.class.getName());
	
	private SBlogtypeDAO blogtypeDAO = new SBlogtypeDAO();
	public List search() throws HibernateException {
		try {			
			return blogtypeDAO.search();
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
	public SBlogtype 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(SBlogtype sBlogtype) throws HibernateException {
		int count = 0;
		String tTitle = sBlogtype.getStTitle().trim();
		try {
			count = blogtypeDAO.search(tTitle);
			if (count == 0) {
				sBlogtype.setFlag("0");
				sBlogtype.setStTitle(tTitle);
				blogtypeDAO.insert(sBlogtype);
				return true;
			}
			return false;
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
	public int delete(SBlogtype sBlogtype) throws HibernateException {
		Integer tbId = sBlogtype.getStId();
		Integer moveId = sBlogtype.getMoveId();
		int flag = 0;
		List listB = null;
		SBlogtype moveType = new SBlogtype();
		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
						SBlog sBlog = (SBlog) it.next();
						sBlog.setSBlogtype(moveType);
						blogtypeDAO.update(sBlog);
					}
				}					
				SBlogtype 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(SBlogtype sBlogtype) throws HibernateException {
		int count = 0;
		String tTitle = sBlogtype.getStTitle().trim();
		try {
			count = blogtypeDAO.search(tTitle);
			if (count == 0) {
				sBlogtype.setFlag("0");
				sBlogtype.setStTitle(tTitle);
				blogtypeDAO.update(sBlogtype);
				return true;
			}
			return false;
		}catch (HibernateException e) {
			log.error(e);
			e.printStackTrace();
			throw new HibernateException(e);
		} 
	}
}