UTF8和GBK之间相互转换（python脚本）

import codecs

def ReadFile(filePath,encoding=""):
    with codecs.open(filePath,"r",encoding) as f:
        return f.read()

def WriteFile(filePath,u,encoding=""):
    with codecs.open(filePath,"w",encoding) as f:
        #f.write(u.encode(encoding,errors="ignore"))
        f.write(u)

def UTF8_2_GBK(src,dst):
    content = ReadFile(src,encoding="utf-8")
    WriteFile(dst,content,encoding="gb18030")

def GBK_2_UTF8(src,dst):
    content = ReadFile(src,encoding="gb18030")
    WriteFile(dst,content,encoding="utf-8")

def main():
    print '*********Begin...**********'
    print '==========================='
    print '++++++++UTF8-2-gbk+++++++++'
    UTF8_2_GBK("test1.txt","test2.txt")
    print '==========================='
    print '++++++++GBK-2-utf8+++++++++'
    GBK_2_UTF8("test2.txt","test3.txt")
    print '==========================='
    print '*********End...************'

if  __name__ == '__main__':
     main()

gb2312、gbk和gb18030三者之间的关系

GB2312：6763个汉字

GBK：21003个汉字

GB18030-2000：27533个汉字

GB18030-2005：70244个汉字

所以，GBK是GB2312的超集，GB18030是GBK的超集。