简单易用的OpenCSV使用教程
跨平台多线程设计！
使用C 分析大数据的时候，数据按CSV格式导出，可以用Excel分析数据。
OpenCSV非常简单易用。
https://github.com/OpenMiniServer
跨平台支持
Windows、linux、Mac、iOS、Android等跨平台设计
编译和执行
请安装cmake工具，用cmake可以构建出VS或者XCode工程，就可以在vs或者xcode上编译运行。
源代码：https://github.com/OpenMiniServer/opencsvhttps://github.com/OpenMiniServer/opencsv)
代码语言：txt复制git clone https://github.com/OpenMiniServer/opencsv
cd ./opencsv
mkdir build
cd build
cmake ..
#如果是win32，在该目录出现opencsv.sln，点击它就可以启动vs写代码调试
make
./test全部源文件
- src/opencsv.h
- src/opencsv.cpp
1.生成csv
代码语言：C 复制#include <assert.h>
#include "opencsv.h"
int main()
{
//make csv
OpenCSV csv = { "ID", "name", "salary" };
csv = { "1", "Jack", "100000" };
csv = { "2", "Tom", "80000" };
csv = { std::to_string(3), "Lucy", "50000" };
std::string buffer1;
csv >> buffer1;
std::string buffer2 = "ID,name,salaryn"
"1,Jack,100000n"
"2,Tom,80000n"
"3,Lucy,50000n";
assert(buffer1 == buffer2);
return 0;
}2.加载csv
代码语言：C 复制#include <assert.h>
#include "opencsv.h"
int main()
{
std::string buffer2 = "ID,name,salaryn"
"1,Jack,100000n"
"2,Tom,80000n"
"3,Lucy,50000n";
OpenCSV csv;
csv << buffer2;
std::string buffer1 = "ID,name,salaryn";
for (size_t i = 1; i < csv.size(); i)
{
auto& line = csv[i];
buffer1.append(line["ID"] "," line["name"] "," line["salary"] "n");
}
assert(buffer1 == buffer2);
return 0;
}3.生成和加载csv文件
代码语言：C 复制#include <assert.h>
#include "opencsv.h"
int main()
{
std::string buffer1;
std::string buffer2;
buffer2 = "ID,name,salaryn"
"1,Jack,100000n"
"2,Tom,80000n"
"3,Lucy,50000n";
std::string filePath = "./test.csv";
//make csv file
{
OpenCSV csv;
csv << buffer2;
assert(csv[0][0] == "ID");
assert(csv[0][2] == "salary");
csv[1]["salary"] = std::to_string(10000);
csv[2]["salary"] = "8000";
csv[3]["salary"] = "5000";
csv >> filePath;
}
buffer2 = "ID,name,salaryn"
"1,Jack,10000n"
"2,Tom,8000n"
"3,Lucy,5000n";
//read csv file
{
OpenCSV csv;
csv << filePath;
buffer1.clear();
csv >> buffer1;
}
assert(buffer1 == buffer2);
return 0;
}
