boost filesystem测试

/*
Title:boost filesystem 子库测试
Author:kagula
Date:2016-01-18
Environment:VS2013Update5 boost 1.57
Prologue:
为了使今后的代码更有可移植性测试下boost filesystem。
Reference:
[1]《（九）boost库之文件处理filesystem》 http://my.oschina.net/lingluonianhua/blog/213999 [2]http://www.boost.org/doc/libs/1_57_0/libs/filesystem/doc/index.htm
*/

#include <boost/filesystem.hpp>

#include <iostream>
using namespace std;

void TestCreate()
{
//若目录已经存在，也不会抛出异常。
boost::filesystem::create_directories("d:/temp");
}

void TestDelete()
{
try
{
//删除文件
{
boost::filesystem::path filename;
filename = "D:/temp/Launcher.exe";
remove(filename);//如果filename变量存放的是dir，会抛出异常.
}

//删除目录（非空folder也会被删除）
{
boost::filesystem::path dir;
dir = "D:/temp";
remove_all(dir);
}
}
catch (boost::filesystem::filesystem_error& /*e*/)
{
}
}

void CopyFiles(const boost::filesystem::path &src, const boost::filesystem::path &dst);
void TestModify()
{
try
{
//copy_directory老是失败，原来它是create directory功能，方法名造成了误导！
//真实的意思是创建tempDest目录，这个目录的属性来自tempSrc目录。
//boost::filesystem::copy_directory("D:/tempSrc/", "d:/tempDest");

//下面的代码调用失败会throw exception.
//boost::filesystem::rename("d:/temp", "d:/temp2");

//"D:/apache-activemq-5.13.0"目录下的文件复制到“d:/temp2”目录下.
CopyFiles("D:/apache-activemq-5.13.0", "d:/temp2");
}
catch (boost::filesystem::filesystem_error& e)
{
std::cout << e.path1() << std::endl;
std::cout << e.what() << std::endl;
}
}

void TestQuery()
{
try
{
boost::filesystem::path dir("c:\\Windows\\System32");
boost::filesystem::path file("D:/temp/Launcher.exe");

//是文件吗？
cout << dir.string() << "=>is_regular_file=>" << (boost::filesystem::is_regular_file(dir) ? "true" : "false") << endl;
cout << file.string() << "=>is_regular_file=>" << (boost::filesystem::is_regular_file(file) ? "true" : "false") << endl;

//是目录吗
cout << dir.string() << "=>is_directory=>" << (boost::filesystem::is_directory(dir) ? "true" : "false") << endl;
cout << file.string() << "=>is_directory=>" << (boost::filesystem::is_directory(file) ? "true" : "false") << endl;

//文件是否存在,目录是否存在
cout << dir.string() << "=>exists=>" << (boost::filesystem::exists(dir) ? "true" : "false") << endl;
cout << file.string() << "=>exists=>" << (boost::filesystem::exists(file) ? "true" : "false") << endl;

cout << "枚举(本层)目录中的所有文件" << endl;
{
boost::filesystem::path dir2("c:\\Windows\\System32");
boost::filesystem::directory_iterator end;
for (boost::filesystem::directory_iterator pos(dir2); pos != end; pos++)
{
std::cout << *pos << std::endl;
}
}

cout << "枚举目录中的所有文件" << endl;
{
typedef boost::filesystem::recursive_directory_iterator rd_iterator;
boost::filesystem::path dir2("D://apache-activemq-5.13.0");
rd_iterator end;
for (rd_iterator pos(dir2); pos != end; pos++)
{
//如果深度大于4层，则不再继续深入
if (is_directory(*pos) && pos.level() > 4)
{
pos.no_push();
}
//如果该目录下有nofind.txt文件，则跳出该目录
if (*pos == "nofind.txt")
{
pos.pop();
}

std::cout << *pos << std::endl;
}
}
}
catch (boost::filesystem::filesystem_error& e)
{
std::cout << e.path1() << std::endl;
std::cout << e.what() << std::endl;
}

cout << "测试路径信息" << endl;
{
boost::filesystem::path dir("C:\\Windows");
dir /= "System32";       //追加下级目录
dir /= "services.exe";
std::cout << dir << std::endl;
std::cout << dir.string() << std::endl;             //转换成std::string 类型
std::cout << dir.root_name() << std::endl;          //盘符名：C:
std::cout << dir.root_directory() << std::endl;     //根目录："\"
std::cout << dir.root_path() << std::endl;          //根路径："C:\"
std::cout << dir.relative_path() << std::endl;      // 相对路径:Windows\System32\services.exe
std::cout << dir.parent_path() << std::endl;        //上级目录：C:\Windows\System32
std::cout << dir.filename() << std::endl;           //文件名：services.exe
std::cout << dir.stem() << std::endl;               //不带扩展的文件名：services
std::cout << dir.extension() << std::endl;          //扩展名：.exe
}
}

// recursively copy file or directory from $src to $dst
void CopyFiles(const boost::filesystem::path &src, const boost::filesystem::path &dst)
{
if (!boost::filesystem::exists(dst))
{
boost::filesystem::create_directories(dst);
}
for (boost::filesystem::directory_iterator it(src); it != boost::filesystem::directory_iterator(); ++it)
{
const boost::filesystem::path newSrc = it->path();
const boost::filesystem::path newDst = dst / it->path().filename().string();
if (boost::filesystem::is_directory(newSrc))
{
CopyFiles(newSrc, newDst);
}
else if (boost::filesystem::is_regular_file(newSrc))
{
boost::filesystem::copy_file(newSrc, newDst, boost::filesystem::copy_option::overwrite_if_exists);
}
else
{
cerr << "Error: unrecognized file - " << newSrc.string() << endl;
}
}
}

int main(int argc, char *argv[])
{
cout << "boost 1.57" << endl;

//TestCreate();
TestModify();
//TestDelete();
//TestQuery();

cin.get();

return 0;
}

#include "boost/filesystem.hpp"   // 包含所有需要的 Boost.Filesystem 声明
#include <iostream>               // 使用 std::cout

namespace fs = boost::filesystem;

// 宏FSTEST：测试f的成员函数，输出成员函数名和结果
#define FSTEST(x) std::cout << #x##": " << f.x << std::endl

int main(int argc, char **argv)
{
fs::path f("\\folder1\\folder2\\folder3\\filename.ext");

FSTEST(string());
FSTEST(root_name());
FSTEST(root_directory());
FSTEST(root_path());
FSTEST(relative_path());
FSTEST(filename());
FSTEST(parent_path());
FSTEST(stem());
FSTEST(extension());

FSTEST(replace_extension("new"));
char buf[] = "hello";
FSTEST(append(buf, buf + sizeof(buf)));
FSTEST(remove_filename());

//
#define  FSTEST2(x) std::cout << #x##": " << fs::x << std::endl
FSTEST2(initial_path());//得到程序运行时的系统当前路径
FSTEST2(current_path());//得到系统当前路径

//要得到EXE文件所在的路径或AppData路径，只能通过调用Win API实现。

return 0;
}