推荐订阅源

http://stackoverflow.com/questions/5884154/golang-read-text-file-into-string-array-and-write

方法一

 1 package main
 2 
 3 import (
 4   "bufio"
 5   "fmt"
 6   "log"
 7   "os"
 8 )
 9 
10 // readLines reads a whole file into memory
11 // and returns a slice of its lines.
12 func readLines(path string) ([]string, error) {
13   file, err := os.Open(path)
14   if err != nil {
15     return nil, err
16   }
17   defer file.Close()
18 
19   var lines []string
20   scanner := bufio.NewScanner(file)
21   for scanner.Scan() {
22     lines = append(lines, scanner.Text())
23   }
24   return lines, scanner.Err()
25 }
26 
27 // writeLines writes the lines to the given file.
28 func writeLines(lines []string, path string) error {
29   file, err := os.Create(path)
30   if err != nil {
31     return err
32   }
33   defer file.Close()
34 
35   w := bufio.NewWriter(file)
36   for _, line := range lines {
37     fmt.Fprintln(w, line)
38   }
39 
40 }

方法二（比较简洁，但文件不能太大）

1 content, err := ioutil.ReadFile(filename)
2 if err != nil {
3     //Do something
4 }
5 lines := strings.Split(string(content), "\n")