用Hibernate操作Oracle Blob

1.在HBM里对应CLOB型的字段为：java.sql.Clob,用MyEclipse DataExplorer生成后手动改一下即可，当然POJO也一样啊，如：

HBM:
<hibernate-mapping> 
<class name="com.chinacars.filterdata.beans.TblWapNews2" table="TBL_WAP_NEWS2">
        <id name="id" type="java.lang.Long">
            <column name="ID" precision="22" scale="0" />
        id>
       <property name="content" type="java.sql.Clob">
            <column name="CONTENT" />
        property>

class>
hibernate-mapping>

POJO:
import  java.sql.Clob;
public   class  test  {
   private Clob content;
   
}

2.首先要给Clob里写一个值,如：注意看一下有底色的地方就明白了吧

package  com.chinacars.filterdata.modidata;

import  java.lang.reflect.InvocationTargetException;
import  java.sql.Clob;
import  java.sql.SQLException;
import  java.util.List;

import  org.apache.commons.beanutils.PropertyUtils;
import  org.apache.commons.logging.Log;
import  org.apache.commons.logging.LogFactory;
import  org.hibernate.Hibernate;

import  com.chinacars.filterdata.beans.TblWapNews1;
import  com.chinacars.filterdata.beans.TblWapNews2;
import  com.chinacars.filterdata.dao.WapNews1DAO;
import  com.chinacars.filterdata.dao.WapNews2DAO;
import  com.chinacars.filterdata.util.StringProcess;

public   class  ModiData2  {
    private static final Log logger = LogFactory.getLog(ModiData2.class);

    public static void main(String[] args) {

        WapNews1DAO wapNews1DAO = new WapNews1DAO();
        WapNews2DAO wapNews2DAO = new WapNews2DAO();

        TblWapNews1 news1 = new TblWapNews1();
        TblWapNews2 news2 = new TblWapNews2();

        List list = wapNews1DAO.getWapNews();
        Clob contentClob = null;
        String cStr = "1";
        String title;
        
        for (int i = 0; i < list.size(); i++) {
            logger.info("============The number : " + i);
            news1 = (TblWapNews1) list.get(i);
            contentClob = news1.getContent();
            try {
                PropertyUtils.copyProperties(news2, news1);
            } catch (IllegalAccessException e) {
                logger.error(e);
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                logger.error(e);
                e.printStackTrace();
            } catch (NoSuchMethodException e) {
                logger.error(e);
                e.printStackTrace();
            }
            title = news1.getTitle();
            if(title != null) {
                title = title.replaceAll("？", "");
                news2.setTitle(title);
            }
            news2.setContent(Hibernate.createClob(cStr));
            try {
                wapNews2DAO.saveWapNews(news2, StringProcess
                        .delInvalidChar(contentClob.getSubString(1,
                                (int) contentClob.length())));
                
            } catch (SQLException e) {
                logger.error(e);
                e.printStackTrace();
            }
        }

    }

}

3.开始写入这内容，最主要的是这里，我在这里卡了好久……
   主是下面红色的部分，其它的有色部分都能搜到：看下面的代码吧：^_^

package  com.chinacars.filterdata.dao;

import  java.io.Writer;
import  java.sql.Clob;

import  oracle.sql.CLOB;

import  org.apache.commons.logging.Log;
import  org.apache.commons.logging.LogFactory;
import  org.hibernate.LockMode;
import  org.hibernate.Session;
import  org.hibernate.Transaction;
import  org.hibernate.lob.SerializableClob;

import  com.chinacars.filterdata.beans.TblWapNews2;

public   class  WapNews2DAO  {
    
    private static final Log logger = LogFactory.getLog(WapNews2DAO.class);

    private Session oraSession;

    private Transaction tx;

    public boolean saveWapNews(TblWapNews2 news, String content) {
        try {
            oraSession = SessionFactory.currentORASession();
            tx = oraSession.beginTransaction();
            oraSession.save(news);
            oraSession.flush();
            oraSession.refresh(news, LockMode.UPGRADE);
            
            SerializableClob clob = (SerializableClob) news.getContent();
            Clob jClob = clob.getWrappedClob();
            CLOB oClob = (CLOB)jClob;
            Writer wt = oClob.getCharacterOutputStream();            
            //byte[] bData = content.getBytes();
            wt.write(content);
            wt.close();
            oraSession.flush();
            tx.commit();
            logger.info("===================  INSERT OK ");
        } catch (Exception e) {
            if (tx != null)
                tx.rollback();
            logger.info("===================  NOT INSERT ");
            logger.info(e);
            e.printStackTrace();
        } finally {
            oraSession.close();
        }
        return true;
    }

}

哈哈，就写到这里了，快没车了……
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