string.save("/log/log.txt",''); string.save("/log/log.txt",'aaaaaaaa\n',true) string.save("/log/log.txt",'bbbb\n',true) string.save("/log/log.txt",'cccc\n',true) //可用于写入日志文件 //自动创建父级目录 //带true时,为追加字符