jdbc 读取oracle long raw 字段，里面存的是文本

参考：

http://singlewolf.iteye.com/blog/278769

http://blog.csdn.net/restraint/article/details/7190265

http://blog.csdn.net/bq1073100909/article/details/49335491

String sql = "select condition from tbl t where t.a = ? and t.b = ?";            PreparedStatement statement = hebSgConn.prepareStatement(sql);            statement.setString(1, "20170305");            statement.setInt(2, 146897);            ResultSet resultSet = statement.executeQuery();            if (resultSet.next()) {                InputStream inputStream = resultSet.getBinaryStream("condition");                ByteArrayOutputStream infoStream = new ByteArrayOutputStream();                int len = 0;                byte[] bytes = new byte[1024];                try {                    while ((len = inputStream.read(bytes)) != -1) {                        // 将bcache中读取的input数据写入infoStream                        infoStream.write(bytes, 0, len);                    }                } catch (IOException e1) {                    throw new Exception("输入流读取异常");                } finally {                    try {                        inputStream.close(); // 输入流关闭                    } catch (IOException e) {                        throw new Exception("输入流关闭异常");                    }                }                try {                    String result = infoStream.toString(DEFAULT_ENCODING);                    System.out.println(result);                } catch (UnsupportedEncodingException e) {                    throw new Exception("输出异常");                }            }

基本上是流操作；