clob 处理

clob 处理

 public void updateNclob(ConnectionBean1 cb,String id,String content) throws SQLException{
  Connection conn=null;
  if(cb.con != null){
   conn=cb.con;
     }else{
       conn=cb.getConnection();
     }
   
  try {
         
   Statement  pstmt = conn.createStatement();
   String sql="select bbs_text from tbl_bbs where bbs_no='"+id+"' for update";
   ResultSet rs = pstmt.executeQuery(sql);
   if(rs.next()){
//    CLOB clob = (CLOB) ((DelegatingResultSet)rs).getClob("bbs_text");
    CLOB clob = (CLOB) rs.getClob("bbs_text");
    OracleClobWriter writer=(OracleClobWriter) clob.getCharacterOutputStream();
    BufferedReader in = new BufferedReader(new StringReader (content));
    char[] c = new char[1024];
    int read=0;
          while ((read=in.read(c))!=-1) {
           writer.write(c,0,read);
          }

    writer.flush();
    writer.close();
    conn.commit();
    rs.close();
    pstmt.close();
   }else{
    conn.rollback();
   }

  }catch(Exception ex){
   conn.rollback();
   ex.printStackTrace();
  }
 
 }