springmvc的登录拦截器配置
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2022-07-09 18:19:16
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登录界面
login.jsp
<%--
Created by IntelliJ IDEA.
User: zxh
Date: 2020/1/8
Time: 14:54
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>登录页面</title>
</head>
<body>
<form id="loginForm" action="${pageContext.request.contextPath}/login.do" method="post">
<table>
<tr>
<td>用户名</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td>密码</td>
<td><input type="password" name="password"></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="登录"></td>
</tr>
</table>
</form>
</body>
</html>
登录成功后页面
main.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>主页面</title>
</head>
<body>
...........主页面
</body>
</html>
登录控制器
LoginController.java
@Controller
public class LoginController {
@RequestMapping("/login")
public String login(String username, String password, HttpSession session){
if ("zxh".equals(username) && "123".equals(password)){
//登录成功
//1.保存session
session.setAttribute("username",username);
//2.进入到主页面
return "main";
}
return "login";
}
}
登录拦截器
LoginInterceptor.java
package com.zxh.backoffice.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoginInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//拦截
//1.排除不需要拦截路径
System.out.println("客户端访问资源的路径："+request.getRequestURL());
if(request.getRequestURI().endsWith("login.do")){
return true; //放行
}
//2.如果已经登录，也要放行
if (request.getSession().getAttribute("user")!=null){
return true;
}
//3.进入到登录页面
request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(request,response);
return false;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("未返回视图前 后处理");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("返回视图前 后处理");
}
}
在springmvc.xml中进行登录拦截器的配置，加上如下配置代码即可
<!--配置登录拦截器-->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/> <!--拦截所有映射路径-->
<bean class="com.zxh.backoffice.interceptor.LoginInterceptor"/>
<!--<mvc:exclude-mapping path=""/>--> <!--排除哪些路径-->
</mvc:interceptor>
</mvc:interceptors>