python实现JAVA源代码从ANSI到UTF-8的批量转换方法

#-*- coding: utf-8 -*-
import codecs
import os
import shutil
import re
import chardet
def convert_encoding(filename, target_encoding):
 # Backup the origin file.
 shutil.copyfile(filename, filename + '.bak')
 # convert file from the source encoding to target encoding
 content = codecs.open(filename, 'r').read()
 source_encoding = chardet.detect(content)['encoding']
 print source_encoding, filename
 content = content.decode(source_encoding) #.encode(source_encoding)
 codecs.open(filename, 'w', encoding=target_encoding).write(content)
def main():
 for root, dirs, files in os.walk(os.getcwd()):
 for f in files:
 if f.lower().endswith('.java'):
 filename = os.path.join(root, f)
 try:
 convert_encoding(filename, 'utf-8')
 except Exception, e:
 print filename
def process_bak_files(action='restore'):
 for root, dirs, files in os.walk(os.getcwd()):
 for f in files:
 if f.lower().endswith('.java.bak'):
 source = os.path.join(root, f)
 target = os.path.join(root, re.sub('.java.bak$', '.java', f, flags=re.IGNORECASE))
 try:
 if action == 'restore':
 shutil.move(source, target)
 elif action == 'clear':
 os.remove(source)
 except Exception, e:
 print source
if __name__ == '__main__':
 # process_bak_files(action='clear')
 main()