redhat5 下 occi连接oracle数据库

1.下载对应的oracle-instantclient，例如：

  instantclient-basic-linux-11.2.0.3.0.zip  //包含动态链接库等
  instantclient-sdk-linux-11.2.0.3.0.zip  //包含开发所需的头文件等

2.通过WinScp上传至redhat5，例如用户为fanbin，目录为/home/fanbin/oracle，分别进行解压

  unzip instantclient-basic-linux-11.2.0.3.0.zip
  unzip instantclient-sdk-linux-11.2.0.3.0.zip
  ln -s instantclient_11_2 instantclient

进入解压的目录
ln -s libclntsh.so.11.1 libclntsh.so
ln -s libocci.so.11.1 libocci.so

3.设置环境变量，例如在/home/fanbin根目录下：
vi .bash_profile
添加以下内容：

  ORACLE_HOME=/home/fanbin/oracle/instantclient
  export LD_LIBRARY_PATH=$ORACLE_HOME
  export NLS_LANG=AMERICAN_AMERICA.ZHS16GBK
  export TNS_ADMIN=$ORACLE_HOME
  PATH=/sbin:$PATH:$HOME/bin
  export PATH

4.在$ORACLE_HOME下创建tnsnames.ora，添加以下内容：

  fbdb =
  (DESCRIPTION =
    (FAILOVER = ON)
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.101)(PORT = 1521))
    )
    (CONNECT_DATA =
       (SID=fbdb) 
    )
  )

[color=red]注意：需要根据数据库配置进行修改[/color]、

5.上传测试代码，文件名为test.cpp，例如：

#include <iostream>
#include <occi.h>

//#pragma comment(lib,"oraocci11d.lib")

using namespace std;
using namespace oracle::occi;

int main()
{
	Environment *env=Environment::createEnvironment();//初始化occi环境

	//用户输入密码，名字，数据库
	string name = "fanbin";
	string pwd = "***";
	string dbname = "fbdb";
	string dbname = "fbdb";

        //用以下字符串就不用配置tnsnames.ora了
        //string dbname ="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp) (HOST=192.168.0.101) (PORT=1521)) (CONNECT_DATA=(SERVICE_NAME=fbdb)))";
	//string dbname ="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp) (HOST=192.168.0.101) (PORT=1521)) (CONNECT_DATA=(SID=fbdb)))";

	try
	{
		Connection *conn=env->createConnection(name,pwd,dbname);//创建到oracle的连接

		cout<<"您已成功连接数据库！"<<endl;

		string strQuery("select * from test");

		Statement *stmt=conn->createStatement(strQuery);//创建查询语句

		ResultSet *rs;//创建记录集用于返回查询的结果
		rs=stmt->executeQuery();//执行查询语句

		//next用于从记录集中获取下一行数据
		while (rs->next())
		{
			cout<<rs->getInt(1)<<":"<<rs->getString(2)<<":"<<rs->getString(3)<<endl;
		}

		//删除
		stmt->setSQL("delete from test where id =:id");
		stmt->setInt(1,4);
		if(stmt->executeUpdate()==1)
		{
			cout<<"删除一条记录"<<endl;
		}
		else
		{  
			cout<<"记录不存在"<<endl;
		}

		//插入
		stmt->setSQL("insert into test values(:id,:key,:value2)");
		stmt->setInt(1,4);
		stmt->setString(2,"中");
		stmt->setString(3,"国");
		if(stmt->executeUpdate()!=1)
		{
			cout<<"插入失败"<<endl;
		}

		//修改
		stmt->setSQL("update test set key =:key where id=:id");
		stmt->setInt(2,4);
		stmt->setString(1,"中1");
		if(stmt->executeUpdate()!=1)
		{
			cout<<"修改失败"<<endl;
		}

		stmt->closeResultSet(rs);//关闭记录集
		conn->terminateStatement(stmt);//关闭语句
		env->terminateConnection(conn);//关闭连接
	}
	catch(SQLException e)
	{
		cout<<"fbin:"<<e.what()<<endl;//捕获错误
	}

	Environment::terminateEnvironment(env);//关闭环境

	return 0;
}

6.编译及运行
编译：
g++ test.cpp -I$ORACLE_HOME/sdk/include -L$LD_LIBRARY_PATH -lociei -lclntsh -lnnz11 -locci -g -o test
运行：
./test