运用 ioutil.ReadFile 、ioutil.WriteFile
package main
import (
"io/ioutil"
"log"
"os"
)
func main() {
buf, err := ioutil.ReadFile("C:/文档/MHOSO/conf/conf.txt")
if err != nil {
log.Println(err)
}
log.Println(string(buf))
log.Println()
//buf.append('8')
/*newBuf := make([]byte, len(buf)*5)
copy(newBuf, buf)
log.Println(string(newBuf))
log.Println()
buf = newBuf*/
str := []byte("this is the new word")
log.Println(string(str))
log.Println()
buf = append(buf, str...)
//buf := []byte("hi this is test")
ioutil.WriteFile("C:/文档/MHOSO/conf/conf.txt", buf, os.ModeAppend)
log.Println(string(buf))
}
*** 输出结果比较奇怪，不知道是不是内存问题：
[Running] go run "c:\Users\cjige\Desktop\test.go"
2018/12/03 20:50:11 hi this is test2018/12/03 20:50:11 hi this is test
[Done] exited with code=0 in 1.647 seconds
更换文件位置后，测试结果如下，append没有成功
[Running] go run "c:\文档\Go\学习\文件读写.go"
2018/12/03 20:54:17 hi this is test2018/12/03 20:54:17
2018/12/03 20:54:17 this is the new word
2018/12/03 20:54:17
2018/12/03 20:54:17 hi this is test
[Done] exited with code=0 in 1.542 seconds