将公共引入的文件放到common.jsp中,其他页面引入该jsp即可使用
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<%@ include file="jsp/common.jsp" %>
<title>My JSP 'index.jsp' starting page</title>
</head>
此时报:Duplicate local variable basePath
因为<%@ include file="jsp/common.jsp" %>是讲file指定的页面代码完全放入到你的页面中,这样,相当于声明了两次
<base href="<%=basePath%>">,所以报了重复的错误。
分析:<%@ include file="" %>和<jsp:include page=""></jsp:include>区别与分析
<%@ include file="" %>是将文件原封不动的copy进现有的文件中,像是拼接好后,再编译成为servlet运行。
<jsp:include page=""></jsp:include>是编译后的servlet运行到该句时,跳转到指定的jsp编译的那个servlet继续运行,然后将运行结果,copy到现在的jsp中,故包含与被包含文件都是单独运行的。
解决办法:为了达到目的,我们可以在一个jsp文件中,只声明要使用的文件的引入,而不需要指定base等,如下:
<script type="text/javascript" src="js/alert.js" charset="UTF-8"></script>
<script type="text/javascript" src="js/jquery-easyui-1.4.1/jquery.easyui.min.js" charset="UTF-8"></script>
<script type="text/javascript" src="js/jquery-easyui-1.4.1/jquery.min.js" charset="UTF-8"></script>
<script type="text/javascript" src="js/jquery-easyui-1.4.1/locale/easyui-lang-zh_CN.js" charset="UTF-8"></script>
<link rel="stylesheet" href="js/jquery-easyui-1.4.1/themes/icon.css" type="text/css" charset="UTF-8"></link>
<link rel="stylesheet" href="js/jquery-easyui-1.4.1/themes/color.css" type="text/css" charset="UTF-8"></link>
<link rel="stylesheet" href="js/jquery-easyui-1.4.1/themes/default/easyui.css" type="text/css" charset="UTF-8"></link>
其中js和css文件均以webapp为根指定相应的引用地址。
此时在在index.jsp中可以使用<%@ include file="jsp/common.jsp" %>即可解决问题
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<%@ include file="jsp/common.jsp" %>
<title>My JSP 'index.jsp' starting page</title>
</head>