/////////////////////////////////////////////////////////////////////////////////////
template<class S, class T>
std::string join_str(std::vector<T>& elems, S& delim) {
std::stringstream ss;
typename std::vector<T>::iterator e = elems.begin();
ss << *e++;
for (; e != elems.end(); ++e) {
ss << delim << *e;
}
return ss.str();
}
std::vector<std::string> split_str(const std::string& s, char delimiter){
std::vector<std::string> tokens;
std::string token;
std::istringstream tokenStream(s);
while ( std::getline(tokenStream, token, delimiter) )
tokens.push_back(token);
return tokens;
}
/////////////////////////////////////////////////////////////////////////
测试的代码：
vector< string >vv = { "a", "b", "c" };
std::string outStr = join_str( vv, "|" );
vector< string > vv2 = split_str( outStr, '|' );