CSV file operations (go LANGUAGE)

GoThe language comesCSVThe file reading module looks good. Playing with it today is part of the system's learning of the Go language ...... Pai_^

 

I. WriteCSVFile

Function:

Func
Newwriter (W Io. Writer) * Writer

Func
(W * writer) flush ()

Func
(W * writer) write (record [] string) (err OS. Error)

Func
(W * writer) writeall (records [] [] string) (err OS. Error)

For details, see the official website:Http://golang.org/pkg/csv/#NewWriter

 

Actually writeCSVYou do not need to use these functions to write files directly according to the rules. However, you still need to write these functions here.DemoTo facilitate future use:

PackageMain  Import(  "CSV"  "OS"  "Bytes" "FMT"  )  FuncMain (){  Filename: ="2.csv" Buf: =New(Bytes. Buffer)  R2: = CSV. newwriter (BUF)      for    I: =    0  ; I    10  ; I ++ {   S: =     make    ([]     string   ,    3  ) S [0] ="User ID"  S [1] ="Name" S [2] ="Depart"  R2.write (s)  R2.flush ()  } FMT. println (BUF)  Fout, err: = OS. Create (filename)  DeferFout. Close () IfErr! =Nil{  FMT. println (filename, err)  Return }  Fout. writestring (BUF. String ())  } 

Ii. ReadCSVFile

Function:

Func
Newreader (r Io. Reader) * Reader

Func
(R * reader) read () (record [] string, err OS. Error)

Func
(R * reader) readall () (records [] [] string, err OS. Error)

For details, see the official website:Http://golang.org/pkg/csv/#Reader.Read

 

1The first thing to solve is to read all the content of the file and coexist as a string. Here we useIoutilModule, detailsCodeAs follows:

 PackageMain Import(  "IO/ioutil"  "FMT"  )  FuncMain (){ B, err: = ioutil. readfile ("1.csv")  IfErr! =Nil{ Panic(ERR. String ())  }  // FMT. println (B) FMT. printf ("% S",String(B ))  } 

2, ReadCSVFile Content:

 PackageMain Import(  "FMT"  "CSV"  "Strings" "IO/ioutil"  )  FuncMain (){  // Filename: = "1.csv" FMT. printf ("Input file name :")  VaRFilenameString FMT. scanf ("% S", & Filename)  Cntb, err: = ioutil. readfile (filename)  IfErr! =Nil{ Panic(ERR. String ())  }  R2: = CSV. newreader (strings. newreader (String(Cntb ))) SS, _: = r2.readall ()  // FMT. println (SS)  SZ: =Len(Ss) ForI: =0; I <SZ; I ++ {  FMT. println (ss [I])  }  } 

  well, that's all. Hope to help you