jsp界面的继承与否剖析

时间：2021-11-28 05:41:07
引入页面时候
${pageContext.request.contextPath}为页面上下文路径；
也可以用js来实现；

<script type="text/javascript"

    src="${pageContext.request.contextPath}/js/student_evaluation/studentInfo.js"></script>

相当于：

<script type="text/javascript" id="studentInfoJS"></script>

<script type="text/javascript">

    document.getElementById('studentInfoJS').src = basePath

            + 'js/student_evaluation/studentInfo.js';

</script>

　

基础页面可以写成如下的代码；

 var basePath = "<%= basePath%>"; 实现全局路径变量，不过${pageContext.request.contextPath}完全可以代替了； 
<%@ page language="java" contentType="text/html; charset=UTF-8"

	pageEncoding="UTF-8"%>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<%

	String path = request.getContextPath();

	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()

			+ path + "/";

%>

<!DOCTYPE html>

<html>

<script type="text/javascript">

	var basePath = "<%= basePath%>";

</script>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>学生成绩信息</title>

<link rel="stylesheet" type="text/css"

	href="<%=basePath%>jquery/jquery.bsgrid-1.37/builds/merged/bsgrid.all.min.css">

<script type="text/javascript"

	src="<%=basePath%>jquery/jquery-1.12.3.min.js"></script>

<script type="text/javascript"

	src="<%=basePath%>jquery/jquery.bsgrid-1.37/builds/js/lang/grid.zh-CN.min.js"></script>

<script type="text/javascript"

	src="<%=basePath%>jquery/jquery.bsgrid-1.37/builds/merged/bsgrid.all.min.js"></script>

<script type="text/javascript" src="<%=basePath%>jquery/jquery.bsgrid-1.37/builds/js/util.min.js"></script>

</head>

<body>

</body>

</html>

通过以下语句引入：

<jsp:include page="/view/base.jsp" flush="true" />

关键时刻还是要用这样直观一点：

<script type="text/javascript">

    var pp = "${pageContext.request.contextPath}";

    alert(pp);

</script>

但是引入的js文件里面这样是取不到值的，所以继承还是有必要的。

好了，先写到这里吧，有啥疑问在沟通啊！

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