OTL是一个纯C++的通用数据库连接模板库，可以支持各种当下流行的数据库，如Oracle，Sybase, MySQL, PostgreSQL, EnterpriseDB, SQLite,  MS ACCESS, Firebird等等.它是一个跨平台类库，在MS Windows, Linux/Unix/Mac OS X 都可以使用。

下载网址：http://otl.sourceforge.net/

OTL使用简单, 只要头文件中包含有: #include "otlv4.h" 就可，实际上整个OTL就一个.H的文件，使用起来极为的方便。

OTL使用方法：

1、首先指定要连接的数据库类型，OTL用宏定义来指定要连接的数据库类型。OTL会根据这个宏定义来初始化数据库连接的环境。

相关的宏定义列表 http://otl.sourceforge.net/otl3_compile.htm

如： #define OTL_ORA8I 表示连接Oracle 8i 数据库。

2、例子

#include <iostream>
using namespace std;
#include <stdio.h>

#define OTL_ORA8I // 指定连接的数据库类型
#include <otlv4.h> // include the OTL 4 header file

otl_connect db; // 定义数据库实例

void insert()
// 添加记录

{
 otl_stream o(50, // buffer size
              "insert into test_tab values(:f1<float>,:f2<char[31]>)",
                 // SQL statement
              db // connect object
             );
 char tmp[32];

 for(int i=1;i<=100;++i){
#if defined(_MSC_VER)
#if (_MSC_VER >= 1400) // VC++ 8.0 or higher
  sprintf_s(tmp,sizeof(tmp),"Name%d",i);
#else
  sprintf(tmp,"Name%d",i);
#endif
#else
  sprintf(tmp,"Name%d",i);
#endif
  o<<static_cast<float>(i)<<tmp;
 }
}

//查询记录

void select()
{
 otl_stream i(50, // buffer size
              "begin "
              "  open :cur1 for "
              "   select * from test_tab "
              "   where f1>=:f<int> and f1<=:f*2; "
              "end;", // SELECT statement via referenced cursor
              db, // connect object
              ":cur1" // referenced cursor placeholder name
             );
   // create select stream
 
 otl_column_desc* desc;
 int desc_len;

 i<<4; // Before the child SELECT statement can be described,
       // the PL/SQL master block needs to be executed.
       // Forcing the execution of the blcok by entering its input
       // patameter.

 desc=i.describe_select(desc_len);

 for(int n=0;n<desc_len;++n){
  cout<<"========== COLUMN #"<<n+1<<" ==========="<<endl;
  cout<<"name="<<desc[n].name<<endl;
  cout<<"dbtype="<<desc[n].dbtype<<endl;
  cout<<"otl_var_dbtype="<<desc[n].otl_var_dbtype<<endl;
  cout<<"dbsize="<<desc[n].dbsize<<endl;
  cout<<"scale="<<desc[n].scale<<endl;
  cout<<"prec="<<desc[n].prec<<endl;
  cout<<"nullok="<<desc[n].nullok<<endl;
 }
 

}

int main()
{
 otl_connect::otl_initialize(); // 初始化Oracle环境
 try{

  db.rlogon("scott/tiger"); // 连接Oracle

  otl_cursor::direct_exec
   (
    db,
    "drop table test_tab",
    otl_exception::disabled // disable OTL exceptions
   ); // drop table

  otl_cursor::direct_exec
   (
    db,
    "create table test_tab(f1 number, f2 varchar2(30))"
    );  // create table

  insert(); 
  select();

 }

 catch(otl_exception& p){ // intercept OTL exceptions
  cerr<<p.msg<<endl; // print out error message
  cerr<<p.stm_text<<endl; // print out SQL that caused the error
  cerr<<p.var_info<<endl; // print out the variable that caused the error
 }

 db.logoff(); //断开数据库连接

 return 0;

}

http://sourceforge.net/projects/boost

tar xzvf boost_1_33_1.tar.gz -C/opt

cd /opt/boost_1_33_1

cd tools/build/jam_src/
./build.sh

cd ../../..
bjam -sTOOLS=gcc install

BOOST_ROOT=/opt/boost_1_33_1
BOOST_INCLUDE=/usr/local/include/boost-1_33_1
BOOST_LIB=/usr/local/lib

#!/bin/sh
#boost settings
BOOST_ROOT=/opt/boost_1_33_1
BOOST_INCLUDE=/usr/local/include/boost-1_33_1
BOOST_LIB=/usr/local/lib
export BOOST_ROOT BOOST_INCLUDE BOOST_LIB

#include <boost/lexical_cast.hpp>
#include <iostream>

int main()
{
using boost::lexical_cast;
int a = lexical_cast<int>("123");
double b = lexical_cast<double>("123.12");
std::cout<<a<<std::endl;
std::cout<<b<<std::endl;
return 0;
}

g++ lex.cpp -I$BOOST_ROOT -o lex

./lex

123
123.12

#include <iostream>
#include <string>
#include <boost/regex.hpp>

int main() {

std::string s = "who,lives:in-a,pineapple under the sea?";

boost::regex re(",|:|-|\\s+");
boost::sregex_token_iterator
p(s.begin( ), s.end( ), re, -1);
boost::sregex_token_iterator end;

while (p != end)
std::cout << *p++ << '\n';
}

g++ re.cpp -I$BOOST_ROOT -lboost_regex-gcc -o re

./re

who
lives
in
a
pineapple
under
the
sea?

ln -s /opt/boost_1_33_1/boost /usr/include/boost

ln -s /usr/local/include/boost-1_33_1/boost /usr/include/boost

cd /opt/boost_1_33_1
bjam -sTOOLS=gcc clean

#!/usr/bin/python

import os
import sys
import re

BOOST_ROOT = os.getenv('BOOST_ROOT')
BOOST_LIB = os.getenv('BOOST_LIB')
#BOOST_ROOT = '/opt/boost_1_33_1'
#BOOST_LIB = '/usr/local/lib'

def getlibs():
alls = os.listdir(BOOST_LIB)
libpattern = re.compile(r'^libboost_([^-]+)-gcc')
libs = {}
for lib in alls:
m = libpattern.match(lib)
if m:
libs[m.group(1).lower()] = 1
return libs


pattern = re.compile(r'^\s*#include\s*<\s*boost/(.+)\.(h|hpp)\s*>')
libs = getlibs()
libskeys = libs.keys()
includes = {}

ENV = os.environ


ARGV = sys.argv[1:]
files = ARGV
if len(files) == 0:
sys.exit()

for f in files:
if f.lower().endswith('.cpp'):
fp = open(f, 'r')
lines = fp.readlines()
for ln in lines:
m = pattern.match(ln)
if m:
libname = m.group(1).lower()
if libname in libskeys:
includes[libname] = 1

libline = ' '.join(map(lambda lib: '-lboost_'+lib+'-gcc', includes.keys()))


obj = ARGV[0]
obj = obj[:len(obj)-4]

#cmd = 'g++ %s -I%s %s -o %s' % (' '.join(files), BOOST_ROOT, libline, obj)
cmd = 'g++ %s %s -o %s' % (' '.join(files), libline, obj)

print cmd
os.system(cmd)

gccboost lex.cpp
gccboost re.cpp

cmd = 'g++ %s %s -o %s' % (' '.join(files), libline, obj)

cmd = 'g++ %s -I%s %s -o %s' % (' '.join(files), BOOST_ROOT, libline, obj)

BOOST_ROOT = os.getenv('BOOST_ROOT')
BOOST_LIB = os.getenv('BOOST_LIB')

BOOST_ROOT = '/opt/boost_1_33_1'
BOOST_LIB = '/usr/local/lib'

cmd = 'g++ %s %s -o %s' % (' '.join(files), libline, obj)

cmd = 'g++ %s %s' % (' '.join(files), libline)

本文详细描述了在Linux操作系统上安装和配置“自适应通信环境(ACE)”的过程和注意事项。
文中的描述基于RedHat Linux 9操作系统和ACE 5.4版