illegal to have multiple occurrences of contentTyp

jsp1的第一行：

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" isELIgnored="false"%>

jsp2的第一行

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

在jsp1中includejsp2，就會致使illegal to have multiple occurrences of 'contentType' with different values (old: text/html; charset=ISO-8859-1, new: text/html; charset=utf-8)報錯，

注意查看兩個文件的第一行，發現jsp2的contentType="text/html; charset=utf-8"中charset前多了一個空格，刪掉此空格。而且jsp2中的UTF-8爲大寫，改爲小寫，嚴格保持jsp一、jsp2兩個文件一致，報錯解決。