使用OCCI连接Linux下Oracle数据库

使用OCCI连接Linux下Oracle数据库

 OCCI( Oracle C++ Call Interface):C++程序与Oracle数据库实现交互的应用程序接口,它以动态连接库的形式提供给用户。OCCI对OCI实行了对象级的封装,其底层仍是OCI
   OCCI连接Linux下的Oracle数据库:
  1 安装Linux下的oracle客户端
  2 下载对应的oracle-instantclient-basic-10.2.0.4-1.i386.zip将其拷贝至Linux的Oracle账户并解压至instantclient_10_2目录
   实现OCCI的六大步骤:
  1 创建环境变量Environment
  2 创建连接对象Connection
  3 创建 SQL语句的执行对象Statement
  4 执行SQL语句(execute()函数,executeUpdate()函数,executeQuery()函数)
  5 处理结果集ResultSet(查询结果)
  6 关闭连接
   在Linux的Oracle数据库下创建一个表用于操作
create table user_info
(
user_id int not null primary key,
user_name varchar2(100)
);
//AddOcci.cc
#include <iostream>
#include <string>
#include <occi.h>
#pragma comment(lib,"oci.lib")
#pragma comment(lib,"ociw32.lib")
#pragma comment(lib,"oraocci10.lib")
using namespace std;
using namespace oracle::occi;
/*******************************
*向 数据库中添加一条记录
*******************************/
int main()
{
//创建环境变量
//Environment
Environment *env = Environment::createEnvironment(Environment::OBJECT);
//username是oracle的用户名
//userpass是oracle的密码
//connstr是oracle的连接字符串
string username = "hahaya";
string userpass = "hahaya";
string connstr = "192.168.0.6:1521/orcl";
//创建连接
//connection
Connection *conn = env->createConnection(username, userpass, connstr);
if(conn == NULL)
{
cout << "access oracle failed..." << endl;
return 0;
}
//创建一个SQL语句的执行对象
//statement
Statement *st = conn->createStatement();
st->setSQL("insert into user_info values(1, 'hahaya')");
st->executeUpdate();
//关闭连接
env->terminateConnection(conn);
Environment::terminateEnvironment(env);
return 0;
}
 执行AddOcci程序之前:
  执行AddOcci程序之后:
使用OCCI连接Linux下Oracle数据库_第1张图片
//ListOcci.cc
#include <iostream>
#include <string>
#include <occi.h>
#pragma comment(lib,"oci.lib")
#pragma comment(lib,"ociw32.lib")
#pragma comment(lib,"oraocci10.lib")
using namespace std;
using namespace oracle::occi;
/*******************************
*查询表中数据
*******************************/
int main()
{
Environment *env = Environment::createEnvironment(Environment::OBJECT);
string username = "hahaya";
string userpass = "hahaya";
string connstr = "192.168.0.6:1521/orcl";
Connection *conn = env->createConnection(username, userpass, connstr);
Statement *st = conn->createStatement();
st->setSQL("select * from user_info");
ResultSet *rs = st->executeQuery();
while(rs->next())
{
cout << "user id:" << rs->getInt(1) << "user name:" << rs->getString(2) << endl;;
}
st->closeResultSet(rs);
env->terminateConnection(conn);
Environment::terminateEnvironment(env);
return 0;
}
  执行ListOcci之前:
  执行DelOcci结果:

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