jsp里更新Clob类型字段数据

ResultSet rs = null;

Connection conn = new dbconn().getconnect();

Statement stmt = null;

int news=0;

              conn.setAutoCommit(false);

     stmt = conn.createStatement();

sql="update wx_active_t t set t.wx_plan_id="+plan_name+",t.active_code='"+active_code+"',t.active_content=empty_clob()  where t.id="+active_id;

    

     news= stmt.executeUpdate(sql);



  String sqlt="select active_content from wx_active_t  where id="+active_id+" for update ";



  rs = stmt.executeQuery(sqlt);

  if(rs.next())

  {

System.out.println(javautil.gb2iso(sContent));

oracle.sql.CLOB clob= (oracle.sql.CLOB)rs.getClob("active_content");

outStream = clob.getCharacterOutputStream();

char[] c = javautil.gb2iso(sContent).toCharArray();

outStream.write(c,0,c.length);

outStream.flush();

outStream.close();

conn.commit();

conn.close();

}