Hibernate操作Clob类型数据是怎样弄的

package dao;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.math.BigDecimal;
import java.sql.Clob;
import java.sql.SQLException;

import org.hibernate.LobHelper;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import entity.Clobtable;
import Factory.HibernateSessionFactory;

public class ClobDao {
	private Session session = null;
	private Transaction tran = null;
	public ClobDao() {
	session = HibernateSessionFactory.getSession();
	}
	
	
	public void saveClob(BigDecimal id,String content){
	Clobtable ct = new Clobtable();
	ct.setId(id);
	LobHelper lh = session.getLobHelper();
	ct.setContent(lh.createClob(content));
	tran = session.beginTransaction();
	try{
	session.save(ct);
	tran.commit();
	System.out.println("插入成功！");
	}catch(Exception e){
	tran.rollback();
	System.out.println("插入失败");
	}
	}
	
	public void getClob(BigDecimal id){
	String hql = "from Clobtable where id = ?";
	Query query = session.createQuery(hql);
	query.setBigDecimal(0, id);
	Clobtable ct = (Clobtable) query.uniqueResult();
	Clob clob = ct.getContent();
	try {
	Reader reader = clob.getCharacterStream();
	BufferedReader br = new BufferedReader(reader);
	String content = br.readLine();
	System.out.println(content);
	} catch (SQLException e) {
	e.printStackTrace();
	System.out.println("读取失败！");
	} catch (IOException e) {
	System.out.println("读取失败！");
	}
	
	}
}