<%@ page contentType="text/html;charset=UTF-8" language="java" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <html> <head> <base href="<%=basePath%>"> <title>$Title$</title> <!-- 引入 layui.css --> <link href="layui/css/layui.css" rel="stylesheet" /> <!-- 引入 layui.js --> <script src="layui/layui.js"></script> </head> <body> <button type="button" class="layui-btn layui-bg-blue">蓝色按钮</button> <div class="layui-tab" lay-filter="test-handle" lay-allowclose="true"> <ul class="layui-tab-title"> <li class="layui-this" lay-id="11">标签1</li> <li lay-id="22">标签2</li> <li lay-id="33">标签3</li> <li lay-id="44">标签4</li> <li lay-id="55">标签5</li> </ul> <div class="layui-tab-content"> <div class="layui-tab-item layui-show">内容-1</div> <div class="layui-tab-item"> <input type="text"/> </div> <div class="layui-tab-item">内容-3</div> <div class="layui-tab-item">内容-4</div> <div class="layui-tab-item">内容-5</div> </div> </div> </body> </html> layui无法解析getContextPath
时间: 2023-08-14 10:07:03 浏览: 47
根据您提供的代码,看起来您正在使用 JSP 页面,并且在其中使用了 `getContextPath()` 方法来获取项目的上下文路径。然后,您将该路径用于设置 layui 的资源引用。
根据您的描述,"layui无法解析getContextPath" 可能是指 layui 目录中的 CSS 文件和 JS 文件无法正确加载或解析。这可能是由于路径设置不正确导致的问题。
其中,您使用了 `<base href="<%=basePath%>">` 标签来设置基础路径,这将影响到整个页面中相对路径的解析。请确保 `basePath` 变量的值是正确的项目上下文路径。
另外,请注意确保 `layui` 目录与您的 JSP 文件处于相同的目录层级,并且在正确的位置。如果 `layui` 目录在正确的位置,那么 `<link href="layui/css/layui.css" rel="stylesheet" />` 和 `<script src="layui/layui.js"></script>` 这两行代码应该可以正确地引入 layui 的 CSS 和 JS 文件。
如果问题仍然存在,请提供更多关于您项目结构、文件布局和报错信息的详细描述,以便更好地帮助您解决问题。
相关问题
写几个jsp项目代码,不包含数据库
以下是几个 JSP 项目代码示例:
1. 简易留言板
```
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>留言板</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/submit.jsp" method="post">
<textarea name="content" placeholder="请输入留言内容"></textarea>
<br>
<input type="submit" value="提交">
</form>
<%-- 显示留言 --%>
<ul>
<% for (String message : (List<String>) request.getAttribute("messages")) { %>
<li><%= message %></li>
<% } %>
</ul>
</body>
</html>
```
submit.jsp:
```
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%-- 处理提交 --%>
<%
String content = request.getParameter("content");
if (content != null && !content.isEmpty()) {
List<String> messages = (List<String>) request.getServletContext().getAttribute("messages");
messages.add(content);
}
response.sendRedirect(request.getContextPath() + "/index.jsp");
%>
```
2. 简易登录页面
```
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/login.jsp" method="post">
<input type="text" name="username" placeholder="请输入用户名">
<br>
<input type="password" name="password" placeholder="请输入密码">
<br>
<input type="submit" value="登录">
</form>
<%-- 显示错误信息 --%>
<% if (request.getAttribute("error") != null) { %>
<p style="color: red;"><%= request.getAttribute("error") %></p>
<% } %>
</body>
</html>
```
login.jsp:
```
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%-- 处理登录 --%>
<%
String username = request.getParameter("username");
String password = request.getParameter("password");
if (username != null && !username.isEmpty() && password != null && !password.isEmpty()) {
if (username.equals("admin") && password.equals("123456")) {
session.setAttribute("user", username);
response.sendRedirect(request.getContextPath() + "/welcome.jsp");
return;
}
}
request.setAttribute("error", "用户名或密码错误");
request.getRequestDispatcher("/index.jsp").forward(request, response);
%>
```
welcome.jsp:
```
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>欢迎</title>
</head>
<body>
<h1>欢迎 <%= session.getAttribute("user") %> 登录</h1>
<a href="${pageContext.request.contextPath}/logout.jsp">退出</a>
</body>
</html>
```
logout.jsp:
```
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%-- 处理退出 --%>
<%
session.invalidate();
response.sendRedirect(request.getContextPath() + "/index.jsp");
%>
```
假设用户登录页面login.jsp在web工程web2022的hw目录下,即访问login.jsp的URL地址是http://localhost:8080/web2023/hw/login.jsp,将login.jsp提交的用户名和密码由FirstServlet(映射地址为/servlet/firstServlet.do)获取进行判断,如果登录成功,则跳转至SecondServlet(映射地址为/servlet/secondServlet.do)显示用户名信息,如果登录不成功,则跳转至登录失败页面hw/failed.jsp。 要求:用户名和密码存在WEB-INF/userinfo.txt文件中,若页面出现404错误则统一跳转至404.html页面,500错误则统一跳转至500.html页面,并提示出错信息。
首先需要在web2023工程下创建以下目录结构:
```
web2023
├── WEB-INF
│ ├── classes
│ ├── lib
│ └── userinfo.txt
├── hw
│ ├── login.jsp
│ └── failed.jsp
├── servlet
│ ├── FirstServlet.java
│ └── SecondServlet.java
├── 404.html
└── 500.html
```
其中,userinfo.txt文件用于存储用户名和密码,格式为:
```
username1=password1
username2=password2
```
FirstServlet的实现如下:
```java
package servlet;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class FirstServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 获取用户名和密码
String username = request.getParameter("username");
String password = request.getParameter("password");
// 读取userinfo.txt文件
String path = getServletContext().getRealPath("/WEB-INF/userinfo.txt");
File file = new File(path);
BufferedReader reader = new BufferedReader(new FileReader(file));
// 验证用户名和密码是否正确
String line;
boolean found = false;
while ((line = reader.readLine()) != null) {
String[] parts = line.split("=");
if (parts.length == 2 && parts[0].equals(username) && parts[1].equals(password)) {
found = true;
break;
}
}
reader.close();
// 根据验证结果跳转页面
if (found) {
HttpSession session = request.getSession();
session.setAttribute("username", username);
response.sendRedirect(request.getContextPath() + "/servlet/secondServlet.do");
} else {
response.sendRedirect(request.getContextPath() + "/hw/failed.jsp");
}
}
}
```
SecondServlet的实现如下:
```java
package servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class SecondServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 获取用户名
HttpSession session = request.getSession();
String username = (String) session.getAttribute("username");
// 显示用户名信息
response.setContentType("text/html;charset=UTF-8");
response.getWriter().println("<h1>欢迎您," + username + "!</h1>");
}
}
```
login.jsp的实现如下:
```html
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/servlet/firstServlet.do" method="post">
<label>用户名:</label>
<input type="text" name="username" /><br />
<label>密码:</label>
<input type="password" name="password" /><br />
<input type="submit" value="登录" />
</form>
</body>
</html>
```
failed.jsp的实现如下:
```html
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录失败</title>
</head>
<body>
<h1>登录失败,请检查用户名和密码是否正确!</h1>
</body>
</html>
```
web.xml的实现如下:
```xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
id="WebApp_ID" version="4.0">
<display-name>web2023</display-name>
<error-page>
<error-code>404</error-code>
<location>/404.html</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/500.html</location>
</error-page>
<servlet>
<servlet-name>firstServlet</servlet-name>
<servlet-class>servlet.FirstServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>firstServlet</servlet-name>
<url-pattern>/servlet/firstServlet.do</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>secondServlet</servlet-name>
<servlet-class>servlet.SecondServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>secondServlet</servlet-name>
<url-pattern>/servlet/secondServlet.do</url-pattern>
</servlet-mapping>
</web-app>
```
在以上实现中,使用了ServletContext的getRealPath方法获取userinfo.txt文件的绝对路径;使用HttpSession对象在FirstServlet和SecondServlet之间传递数据;使用EL表达式获取web应用的上下文路径;使用了web.xml的error-page配置实现404和500错误页面的统一处理。