我怎样才能将这些文件与修改日期时间排序文件夹中的文件列表 [英] how can I get a list of files in a folder in which the files are sorted with modified date time

问题描述

我需要的文件列表中的文件夹中，文件将其修改日期时间进行排序。

I need to a list of files in a folder and the files are sorted with their modified date time.

我用C ++工作在Linux下，Boost库的支持。

I am working with C++ under Linux, the Boost library is supported.

任何人都可以请我提供的如何实现此code的一些示例？

Could anyone please provide me some sample of code of how to implement this?

推荐答案

大多数操作系统不以任何特定的顺序返回目录条目。如果你想对它们进行排序（你应该如果你要显示的结果，人类用户），你需要做的是在一个单独的通行证。你能做到这一点的方法之一是项插入到的std :: multimap中，像这样：

most operating systems do not return directory entries in any particular order. If you want to sort them (you probably should if you are going to show the results to a human user), you need to do that in a separate pass. One way you could do that is to insert the entries into a std::multimap, something like so:

namespace fs = boost::filesystem;
fs::path someDir("/path/to/somewhere");
fs::directory_iterator end_iter;

typedef std::multimap<std::time_t, fs::path> result_set_t;
result_set_t result_set;

if ( fs::exists(someDir) && fs::is_directory(someDir))
{
  for( fs::directory_iterator dir_iter(someDir) ; dir_iter != end_iter ; ++dir_iter)
  {
    if (fs::is_regular_file(dir_iter->status()) )
    {
      result_set.insert(result_set_t::value_type(fs::last_write_time(dir_iter->path()), *dir_iter));
    }
  }
}

您可以再通过 result_set 迭代，并映射的boost ::文件系统::路径项将在升序

You can then iterate through result_set, and the mapped boost::filesystem::path entries will be in ascending order

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