US-ASCIISeven-bit ASCII, a.k.a. ISO646-US, a.k.a. the Basic Latin block of the Unicode character setISO-8859-1 ISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1UTF-8Eight-bit UCS Transformation FormatUTF-16BESixteen-bit UCS Transformation Format, big-endian byte orderUTF-16LESixteen-bit UCS Transformation Format, little-endian byte orderUTF-16Sixteen-bit UCS Transformation Format, byte order identified by an optional byte-order mark
1、request.setCharacterEncoding("UTF-8"); //只对post方式有效，对get方式无效
