/
csv.go
54 lines (51 loc) · 1.19 KB
/
csv.go
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package goconf
import (
"encoding/csv"
"fmt"
"io"
"os"
"sync"
)
//ReadCsv csv 文件读取
func ReadCsv(path string, message chan []string, midf func([]string, int), end func(int), fNum int) error {
file, err := os.Open(path)
defer file.Close()
if err != nil {
return err
}
reader := csv.NewReader(file)
count := 0
for {
recoder, err := reader.Read()
if err == io.EOF {
break
} else if err != nil {
fmt.Println("Error:", err)
return err
}
count++
if count%fNum == 0 {
midf(recoder, count)
}
message <- recoder
}
end(count)
return nil
}
//ReadCsvWorker 读取文件,并且有worker 消耗文件
//path 文件路径 midf 读取函数中间操作, fNum读取多少个文件执行f函数
//worker 工作池 ,workerNumber 工作池数量
func ReadCsvWorker(path string, midf func([]string, int), endf func(int), fNum int, worker func(chan []string, *sync.WaitGroup), workerNumber int) error {
message := make(chan []string, 10000)
var wg sync.WaitGroup
for i := 0; i < workerNumber; i++ {
wg.Add(1)
go worker(message, &wg)
}
err := ReadCsv(path, message, midf, endf, fNum)
for i := 0; i < workerNumber; i++ {
message <- []string{"ok"}
}
wg.Wait()
return err
}