回车, 换行符, CRLF, LF 换行 line feed, LF, newline, \n, ascii 码: 0x0A 回车, carriage return, CR, return, \r, ascii 码: 0x0D CRLF, Carriage return & line feed unix: 换行, \n windows: 换行(回车+换行), \r\n, Unix/Mac 下打开会显示成 ^M macos: Line Feed, LF https://blog.csdn.net/wjcquking/article/details/6634504 回