jsp utf 乱码异常 com.caucho.jsp.JspParseException: illegal utf8 encoding at 0xdf

jsp utf 乱码错误 com.caucho.jsp.JspParseException: illegal utf8 encoding at 0xdf
解决：jsp utf 乱码错误：
com.caucho.jsp.JspParseException: illegal utf8 encoding at 0xdf
在页面前边加上：

<%@ page language="java" contentType="text/html; charset=utf-8"  %>