这篇文章主要介绍“springMVC实现自定义拦截器登录检测功能”,在日常操作中,相信很多人在springmvc实现自定义拦截器登录检测功能问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”SpringMVC实现
这篇文章主要介绍“springMVC实现自定义拦截器登录检测功能”,在日常操作中,相信很多人在springmvc实现自定义拦截器登录检测功能问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”SpringMVC实现自定义拦截器登录检测功能”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
一、定义登录控制器
二、自定义登录拦截器
目录结构
代码:
创建TUser类
package com.demo.pojo;import lombok.AllArgsConstructor;import lombok.Data;import lombok.NoArgsConstructor;@Data@AllArgsConstructor@NoArgsConstructorpublic class TUser { private String name; private String passWord;}
创建LoginController类
package com.demo.controller;import com.demo.pojo.TUser;import com.demo.pojo.User;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.WEB.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import javax.servlet.Http.httpservletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;@Controller@RequestMapping("/user")public class LoginController { @RequestMapping("/login") public String login(Model model){ model.addAttribute("msg","这里是登陆界面"); return "login"; } @RequestMapping("/doLogin") public String doLogin(TUser tUser, HttpServletRequest req, HttpServletResponse resp, Model model){ System.out.println("###LoginController.doLogin()"); if(!"admin".equals(tUser.getName())||!"admin".equals(tUser.getPassword())){ model.addAttribute("msg","用户名或密码不正确!"); return "loginFail";//跳转到loginFail.jsp } HttpSession httpSession=req.getSession(true);//存在session则使用,不存在则创建 httpSession.setAttribute("user",tUser); model.addAttribute("msg","登录成功"); return "success";//跳转到success.jsp } @RequestMapping("/loginOut") public String loginFail(HttpSession session,Model model){ model.addAttribute("msg","退出登录"); session.removeAttribute("user"); return "login"; }}
页面代码:
login.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head> <title>login</title></head><body><h2>${msg}</h2><fORM id="login" action="${pageContext.request.contextPath}/user/doLogin" method="post"> 用户名:<input type="text" name="name"/><br/> 密码:<input type="password" name="password"><br/> <input type="submit"></form></body></html>
loginFail.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head> <title>loginFail</title></head><body><h2>${msg}</h2><h3><a href="${pageContext.request.contextPath}/user/loginOut" rel="external nofollow" rel="external nofollow" >返回登录界面</a></h3></body></html>
success.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head> <title>success</title></head><body>${msg}<h3><a href="${pageContext.request.contextPath}/user/loginOut" rel="external nofollow" rel="external nofollow" >退出登录</a></h3></body></html>
代码:
创建LoginInterceptor类,作为拦截器类需实现HandlerInterceptor,并重写里面的三个方法preHandle、postHandle、afterCompletion:
package com.demo.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 { System.out.println("LoginInterceptor preHandle"); //放行:判断什么情况下 //1、请求到登陆界面放行,首次登陆 if(request.getRequestURI().contains("login")||request.getRequestURI().contains("doLogin")){ return true; } //2、退出登录可直接放行 if(request.getRequestURI().contains("loginOut")){ return true; } //3、通过登录进入 放行 if(request.getSession().getAttribute("user")!=null){ return true; } //非法请求进行拦截 //重定向到登录页面 response.sendRedirect(request.getContextPath()+"login"); //拦截 return false; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { System.out.println("LoginInterceptor "+"postHandle"); } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { System.out.println("LoginInterceptor "+"afterCompletion"); }}
在spring-mvc.xml中配置LoginInterceptor拦截器 测试: 1、正常登录(正确密码:admin)
1、点击退出登录
用户名密码错误
1、点击返回登录界面
非法请求
到此,关于“SpringMVC实现自定义拦截器登录检测功能”的学习就结束了,希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习,快去试试吧!若想继续学习更多相关知识,请继续关注编程网网站,小编会继续努力为大家带来更多实用的文章!
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