2.6 Go CSV 읽기

package main

import (
    "encoding/csv"
    "fmt"
    "io/ioutil"
    "log"
    "strings"
    "io"
)

// CSV map 
func CSVToMap(filePath string) map[string]string{
    dat, err := ioutil.ReadFile(filePath)
    if err != nil {
        log.Fatal(err)
    }
    r := csv.NewReader(strings.NewReader(string(dat[:])))
    
    record, err := r.ReadAll()  //record 
    if err != nil {
        panic(" ")
    }
    //fmt.Println(record)
    
    if r.FieldsPerRecord < 1 {
        panic("CSV ")
    }
    
    mapCsv := make(map[string]string)
    // csv KEY， value， map; 
    for _, val := range record {
        mapCsv[val[0]] = val[1]
    }
    //fmt.Println(mapCsv)
    return mapCsv
}

// CVS 
func readCSV(filePath string){
    dat, err := ioutil.ReadFile(filePath)
    if err != nil {
        log.Fatal(err)
    }
    r := csv.NewReader(strings.NewReader(string(dat[:])))
    
    for {
        record, err := r.Read()
        
        if err == io.EOF {
            break
        }
        if err != nil {
            log.Fatal(err)
        }
        for i:= 0;i {
            fmt.Println(i,record[i])
        }
    }
}

func main() {
    filePath := "/usr/local/automng/src/goapp/src/tools/cmd2.csv"
    readCSV(filePath)
    mapCsv := CSVToMap(filePath)
    df := mapCsv["common"]
    fmt.Println(df)
}