java - ${pageContext.request.contextPath}获取相对路径无效
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问题描述
问 题
1.在jsp中使用${pageContext.request.contextPath}获取相对路径，可是最后路径变为：http://localhost:8080/oneself/$%7BpageContext.request.contextPath%7D/css/reset.css
2.贴图，这是浏览器的调试页面，可以看到获取css的路径带上了${pageContext.request.contextPath}，而console中打印的获取css地址为$%7BpageContext.request.contextPath%7D，并不清楚什么原因，希望各位大佬指点。
login.jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Login</title>
<!-- CSS -->
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/css/reset.css">
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/css/supersized.css">
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/css/style.css">
<!-- Javascript -->
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery.min.js" ></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/supersized.3.2.7.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/supersized-init.js"></script>
<!-- HTML5 shim, for IE6-8 support of HTML5 elements -->
<!--[if lt IE 9]>
<!--<script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>-->
<!--[endif]-->
</head>
<body oncontextmenu="return false">
<div class="page-container">
<div id="log-box">
<h1>登 录</h1>
<form action="${pageContext.request.contextPath}/user/login.do" method="post">
<table>
<tr>
<td class="log-reg">
<div>
<input type="text" id="username" name="username" class="username"
placeholder="用户名/邮箱名" autocomplete="off" onblur="validname()" />
</div></td>
<td class="errmsg"><span style="overflow: hidden;"
id="errorMsgname" />
</td>
</tr>
<tr>
<td class="log-reg">
<div>
<input id="password" type="password" name="password" class="password"
placeholder="密码" oncontextmenu="return false"
onpaste="return false" onblur="validpwd()" />
</div>
<td class="errmsg"><span style="overflow: hidden;" id="errorMsgpwd" />
</td>
</tr>
<tr>
<td colspan="2" class="btn-left"><input type="submit"
class="btn" id="submit" value="登 录" />
</td>
</tr>
<tr>
<td colspan="2" class="btm-left">
<p class="box-button">
没有账号,先 <a href="${pageContext.request.contextPath}/user/showregister.do">注册</a>
</p>
</td>
</tr>
<tr>
<td colspan="2" class="btm-pa">
<p class="box-button" id="btm-p">
<a href="#">忘记密码?</a>
</p>
</td>
</tr>
</table>
</form>
</div>
<div class="connect">
<p>If we can only encounter each other rather than stay with each
other,then I wish we had never encountered.</p>
<p style="margin-top:20px;">如果只是遇见，不能停留，不如不遇见。</p>
</div>
</div>
<div class="alert" style="display:none">
<h2>消息</h2>
<div class="alert_con">
<p id="ts"></p>
<p style="line-height:70px">
<a class="btn">确定</a>
</p>
</div>
</div>
<script type="text/javascript">
$(".btn").click(function() {
is_hide();
});
$("#submit").live('click', function() {
var u = $("#username");
var p = $("#password");
if (u.val() == '' || p.val() == '') {
$("#ts").html("用户名或密码不能为空~");
is_show();
return false;
} else {
var reg = /^[0-9A-Za-z]+$/;
if (!reg.exec(u.val())) {
$("#ts").html("用户名错误");
is_show();
return false;
}
}
});
window.onload = function() {
$(".connect p").eq(0).animate({
"left" : "0%"
}, 600);
$(".connect p").eq(1).animate({
"left" : "0%"
}, 400);
};
function is_hide() {
$(".alert").animate({
"top" : "-40%"
}, 300);
}
function is_show() {
$(".alert").show().animate({
"top" : "45%"
}, 300);
};
function validname() {
var val = $("#username").val();
if (val == '' || $.trim(val) == '') {
$("#errorMsgname").html('用户名不能为空');
$("#errorMsgname").show();
} else {
$.ajax({
type: "post",
url: "finduserisnull.do?info=" + val,
data: "",
success: function(data) {
if(data=="false"){
$("#errorMsgemail").html('用户未注册!');
}else {
$("#errorMsgemail").html('<img src="img/yes.jpg" style="width: 18px;height: 18px;"/>');
}}
});
}
};
function validpwd() {
//获取id为password对应的input输入框中的值
var val = $("#password").val();
if (val == '' || $.trim(val) == '') {
//如果val为空或者空格，将错误消息显示在对应span
$("#errorMsgpwd").html('密码不能为空');
//让span显示出来
$("#errorMsgpwd").show();
} else {
$("#errorMsgpwd").html('<img src="${pageContext.request.contextPath}/img/yes.jpg" style="width: 18px;height: 18px;"/>');
}
};
</script>
</body>
</html>
解决方案
最后看了下Stack Overflow，是我web.xml中的头文件web-app版本过低所致，必须为2.4及以上才能正确的获取相对路径。
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