数据转换为字符串

#include <string>
#include <vector>
#include <boost/lexical_cast.hpp>
#include <boost/alogrithm/string.hpp>

//ostringstream对象用来进行格式化的输出，常用于将各种类型转换为string类型
//ostringstream只支持<<操作符
template<typename T> string toString(const T& t)
{
	ostringstream oss;			//创建一个格式化输出流
	std::oss << t;				//把值传递如流中
	return oss.str();
}
std::cout << toString(9.5) << std::endl;				//实型->string：输出9.5
std::cout << toString(123456) << std::endl;				//整型->string：输出123456
std::cout << toString(123456789987654) << std::endl;	//长整型->string：输出123456789987654
std::cout << toString(true) << std::endl;				//布尔型->string：输出1



//使用c++11标准库特性函数
static std::string Unsigned64ToStr(unsigned long long aData)
{
	return std::to_string(aData)
}
string std::to_string(int val);
string std::to_string(long val);
string std::to_string(long long val);
string std::to_string(unsigned val);
string std::to_string(unsigned long val);
string std::to_string(float val);
string std::to_string(double val);
string std::to_string(long double val);


//数值转化为字符串
/*
参数：输入数值数组，两个数值字符串间的间隔符，是否加引号
	std::vector<int> vec(1,2,3)
	nums2str<int>(vec,";")
	将获取到字符串 1;2;3
*/
template<typename DTYPE>
static std::string nums2str(std::vector<DTYPE> aNums, std::string aSep = ",", bool a2str = false)
{
	std::ostringstream os;
	bool first = true;
	for (auto& num : nNums)
	{
		if (!first)
		{
			os << aSep;
		}

		first = false;
		if (!a2str)
		{
			os << num;
		}
		else
		{
			os << "'" << num << "'";
		}
	}

	return os.str();
}


//数值转化为字符串
/*
参数：输入数值指针，分割成字符串的个数，两个数值字符串间的间隔符
	const int vec[] ={1,2,3}
	nums2str<int>(vec,3,";")
	将获取到字符串 1;2;3
*/
template<typename DTYPE>
static std::string nums2str(const DTYPE* aNums, int iSize, std::string aSep = ",")
{
	std::ostringstream os;
	bool first = true;
	for (int i = 0; i < iSize; i++)
	{
		DTYPE num = *(aNums + i);
		if (!first)
		{
			os << aSep << num;
		}
		else
		{
			os << num;
			first = false;
		}
	}

	return os.str();
}