<%@ page contentType%> 注意事项两则

1. charset=utf-8 & charset=UTF-8 are both OK

jsp 设置编码 <%@ page contentType="text/html; charset=utf-8"%>，写成 UTF-8 也可以

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2. <%@ include file> 涉及到的两个 JSP 对 <%@ page contentType%> 有要求

如果写了 <%@ include file="/WEB-INF/xxx.jsp" %>，那么这两个 jsp 的 <%@ page contentType%> 必须完全相同

注意是 完！全！相！同！ 一个空格都不能多。

曾经的教训：

file	instruction
main JSP	<%@ page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
included JSP	<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>

导致 resin 3.0.23 下报：

JspLineParseException: contentType ‘text/xml; charset=UTF-8’ conflicts with previous value of contentType ‘text/html;charset=UTF-8’. Check the .jsp and any included .jsp files for conflicts