读取filename.txt，对image目录下面的文件重命名

filename.txt

001 (1).jpg,111.jpg
001 (2).jpg,ddsg.jpg
001 (3).jpg,腊.jpg

rename.go

/**
* filename.txt格式
* 001 (1).jpg,111.jpg
* 001 (2).jpg,ddsg.jpg
* 001 (3).jpg,腊.jpg
*
**/

package main

import (
	"bufio"
	"bytes"
	"fmt"
	"io"
	"os"
	"strings"
)

var fileNameMap map[string]string

func readFileWithReadLine(fn string) (name map[string]string, err error) {
	fmt.Println("readFileWithReadLine")
	fileNameMap = make(map[string]string)
	file, err := os.Open(fn)
	defer file.Close()

	if err != nil {
		return fileNameMap, err
	}

	// Start reading from the file with a reader.
	reader := bufio.NewReader(file)

	for {
		var buffer bytes.Buffer

		var l []byte
		var isPrefix bool
		for {
			l, isPrefix, err = reader.ReadLine()
			buffer.Write(l)

			// If we've reached the end of the line, stop reading.
			if !isPrefix {
				break
			}

			// If we're just at the EOF, break
			if err != nil {
				break
			}
		}

		if err == io.EOF {
			break
		}

		line := buffer.String()

		nameStr := strings.Split(line, ",")

		fileNameMap[nameStr[0]] = nameStr[1]
		// Process the line here.
	}

	if err != io.EOF {
		fmt.Printf(" > Failed!: %v\n", err)
	}

	return fileNameMap, nil
}
func rename(oldName string, newName string) {
	err := os.Rename(oldName, newName)
	if err != nil {
		fmt.Println(err)
		return
	}
	return
}
func main() {
	filename, _ := readFileWithReadLine("./filename.txt")
	const prefix string = "./image/"
	for k, v := range filename {
		rename(prefix+k, prefix+v)
	}
	fmt.Println("rename end")
}