pb写的从oracle库中读取和保存图片，并另存为文件-pb Writing from oracle database to read and save the image, and save as document

通过读取oracle数据库的dbf文件获取表结构和表数据,可用于对oracle数据库的紧急修复，在oracle数据库启动不了的时候。-Dbf oracle database by reading the file access table structure and table data can be used for emergency repair of the oracle database, oracle database will not start in time.