自己封装的关于csv文件读取的类，可以读取csv文件，并按照自己的需求转换数据结果。提供字符串转float，int等功能。
头文件
#ifndef __CSV_FILE_H__
#define __CSV_FILE_H__
#include "cocos2d.h"
class CSVFile:public cocos2d::Ref
{
public:
CSVFile();
~CSVFile();
static CSVFile* create(std::string filename);
bool initWithFile(std::string filename);
std::string getData(unsigned int rowIndex,unsigned int colIndex);
void rowSplit(std::vector<std::string> &rows,const std::string &content,const char &rowSeperator);
void fieldSplit(std::vector<std::string> &fields,std::string line);
//获取带引号的字段
int getFieldWithQuoted(const std::string &line,std::string& field,int index);
//获取无引号的字段
int getFieldNoQuoted(const std::string &line,std::string &field,int index);
inline int getColLength() { return m_nLength; }
inline int getRowLength() { return data.size(); }
float getDataOfFloat(unsigned int rowIndex,unsigned int colIndex);
int getDataOfInt(unsigned int rowIndex,unsigned int colIndex);
private:
const std::string m_seperator;
int m_nLength;
std::string _text;
std::vector<std::vector<std::string>> data;
};
#endif
cpp文件
#include "CSVFileUtil.h" USING_NS_CC; CSVFile::CSVFile() :m_seperator(",") { } CSVFile* CSVFile::create(std::string filename) { CSVFile* csv = new CSVFile(); if (csv->initWithFile(filename)) { csv->autorelease(); return csv; } delete(csv); return NULL; } bool CSVFile::initWithFile(std::string filename) { _text = FileUtils::getInstance()->getStringFromFile(filename); std::vector<std::string> line; rowSplit(line,_text,'\n'); for (unsigned int i = 0; i < line.size(); ++i) { std::vector<std::string> fieldVector; fieldSplit(fieldVector,line[i]); data.push_back(fieldVector); m_nLength = std::max(m_nLength,(int)fieldVector.size()); } return true; } void CSVFile::rowSplit(std::vector<std::string> &rows,const char &rowSeperator) { std::string::size_type lastIndex = content.find_first_not_of(rowSeperator,0); std::string::size_type currentIndex = content.find_first_of(rowSeperator,lastIndex); while (std::string::npos != currentIndex || std::string::npos != lastIndex) { rows.push_back(content.substr(lastIndex,currentIndex - lastIndex)); lastIndex = content.find_first_not_of(rowSeperator,currentIndex); currentIndex = content.find_first_of(rowSeperator,lastIndex); } } void CSVFile::fieldSplit(std::vector<std::string> &fields,std::string line) { if (line[line.length() - 1] == '\r') { line = line.substr(0,line.length() - 1); } std::string field; unsigned int i = 0,j = 0; while (j < line.length()) { if (line[i] == '"') { //有引号 j = getFieldWithQuoted(line,field,i); } else { j = getFieldNoQuoted(line,i); } fields.push_back(field); i = j + 1; //解析下一个field， ＋1为了跳过当前的分隔符 } } int CSVFile::getFieldWithQuoted(const std::string &line,int i) { unsigned int j = 0; field = std::string(); if (line[i] != '"') { return -1; } for (j = i + 1; j < line.length() - 1; ++j) { if (line[j] != '"') { //当前char不为引号，则是field内容(包括逗号) field += line[j]; } else { //遇到field结束时的引号，可以返回 return j; break; } } if (j == line.length()) { } return j; } int CSVFile::getFieldNoQuoted(const std::string &line,int index) { unsigned int j = 0; //找到下一个分隔符位置 j = line.find_first_of(m_seperator,index); if (j > line.length()) { j = line.length(); } field = std::string(line,index,j - index); return j; } ///////search data std::string CSVFile::getData(unsigned int rowIndex,unsigned int colIndex) { rowIndex--; colIndex--; if (rowIndex >= getRowLength() || colIndex >= getColLength()) { return ""; } if (colIndex >= data[rowIndex].size()) { return ""; } return data[rowIndex][colIndex]; } float CSVFile::getDataOfFloat(unsigned int rowIndex,unsigned int colIndex) { return atof(getData(rowIndex,colIndex).c_str()); } intCSVFile::getDataOfInt(unsigned int rowIndex,unsigned int colIndex) { return atoi(getData(rowIndex,colIndex).c_str()); } CSVFile::~CSVFile() { _text.clear(); }
