C++字符串切割

字符串切割

#include <algorithm>
#include <string>
#include <vector>

void StringUtils::SplitString(const std::string& source, const std::string& delimiter, std::vector<std::string>& vec) {
  size_t last = 0;
  size_t index = source.find_first_of(delimiter);
  while (index != std::string::npos) {
    vec.push_back(source.substr(last, index - last));
    last = index + 1;
    index = source.find_first_of(delimiter, last);
  }

  if (std::string::npos == index) {
    std::string strTmp = source.substr(last, source.length() - last);
    if (!strTmp.empty()) {
      vec.push_back(strTmp);
    }
  }
}

字符串切割并删除空格

#include <algorithm>
#include <string>
#include <vector>

void StringUtils::SplitStringWithTrim(const std::string& source,
                                      const std::string& delimiter,
                                      std::vector<std::string>& vec) {
  size_t last = 0;
  size_t index = source.find_first_of(delimiter);
  while (index != std::string::npos) {
    std::string strTmp = source.substr(last, index - last);
    vec.push_back(trim(strTmp));
    last = index + 1;
    index = source.find_first_of(delimiter, last);
  }

  if (std::string::npos == index) {
    std::string strTmp = source.substr(last, source.length() - last);
    if (!strTmp.empty()) {
      vec.push_back(trim(strTmp));
    }
  }
}

// trim from begin
static inline std::string& ltrim(std::string& s) {
    s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::ptr_fun<int, int>(std::isspace))));
    return s;
}

// trim from end
static inline std::string& rtrim(std::string& s) {
    s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end());
    return s;
}

// trim from both ends
static inline std::string& trim(std::string& s) { return ltrim(rtrim(s)); }