C++用OTL访问Oracle数据库的例子
在Windows平台,数据库的访问手段比较丰富,如ADO或者ODBC等,然而在UNIX/Linux平台上访问数据就不是那么容易了。 如果我们使用Java作为开发语言,那么JDBC可以提供数据访问的途径,但是如果用C/C++就没这么简单了,你必须使用最原始的C/C++调用接口来访问数
在Windows平台,数据库的访问手段比较丰富,如ADO或者ODBC等,然而在UNIX/Linux平台上访问数据就不是那么容易了。 如果我们使用Java作为开发语言,那么JDBC可以提供数据访问的途径,但是如果用C/C++就没这么简单了,你必须使用最原始的C/C++调用接口来访问数据库。目前大型的数据库,如Oracel或者DB2都提供了C/C++的调用接口,但是作为开发人员使用这些接口是一件很头痛的事情,你必须要熟记每一个API,然而OTL给我带来了一个新的数据库访问方式。
本文将通过一个例子来展示OTL是如何使用的。希望借此使得那些和我一样的OTL入门者少走一些弯路。
开发环境:Windows 2003 + Oracle 9i
开发工具:Dev C++ V 4.9.9.0
Oracle安装路径:C:/Oracle/
我们仅仅展示数据库的连接和释放。
首先,我们建立一个Dev C++项目,名为“OTL”
在弹出的对话框中选择“Empty Project”
接下来选择一个位置来保存工程文件
之后,我们将向工程中添加我们的源代码文件,源代码文件如下:
#include
using namespace std;
#include
#define OTL_ORA9I // Compile OTL 4.0/OCI9i
#define OTL_ORA_TIMESTAMP // enable Oracle 9i TIMESTAMPs [with [local] time zone]
#include "otlv4.h" // include the OTL 4.0 header file
otl_connect db; // connect object
int main()
{
otl_connect::otl_initialize(); // initialize OCI environment
try
{
db.rlogon("scott/tiger@ORACLE9I
cout"Connect to Database" }
catch(otl_exception& p)
{
// intercept OTL exceptions
cerr// print out error message
cerr// print out SQL that caused the error
cerr// print out SQLSTATE message
cerr// print out the variable that caused the error
}
db.logoff(); // disconnect from Oracle
return 0;
}
我们还需要将otlv4.h这个头文件添加到我们的工程中。
此时,我们需要设置一下头文件的路径和库文件的路径
此时,我们就可以编译并执行该程序了!
作者:http://allanyan.cnblogs.com/articles/105159.html

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