这是jsp错误，不允许contentType="text/html; charset=UTF-8",有空格。
之前错误写法为：<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
正确写法为：<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"%>
/WEB-INF/pages/common/head.jsp (line: 1, column: 2) Page directive: illegal to have multiple occurrences of contentType with different values (old: text/html; charset=UTF-8, new: text/html; charset=ut
原文地址：http://www.cnblogs.com/sllcom/p/7823481.html