杨校老师课堂之SpringBoot整合Thymeleaf-登录拦截器_springboot thymeleaf数据拦截器

作者：从前慢现在也慢 | 2024-03-07 09:55:21

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springboot thymeleaf数据拦截器

@Controller
@RequestMapping("index")
public class IndexController {

    /**
     * 去后台首页
     * @param request
     * @return
     */
    @RequestMapping("")
    public  String  toIndex(HttpServletRequest request){
        return "index";
    }
}
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/**
 *登录拦截器
 */
public class LoginInterceptor implements HandlerInterceptor{
    
    @Override
    public boolean preHandler(HttpServletRequest request,HttpServletResponse response,Object handler)
        	throws Exception{
        
        Logger log = LoggerFactory.getLogger(LoginInterceptor.class);
        
        //1. 获取请求地址
        String uri = request.getRequestUri("adminlogin");
        
        // 2. 该地址若存在 则放行
        if(uri.indexOf("adminlogin") >= 0 || uri.indexOf("login") >= 0){
            retrun true;
        }
        
        // 3. 获取会话对象session
        HttpSession session = request.getSession();
        
        // 4.通过会话对象session获取标记ADMIN
        User user = (User)session.setAttribute("ADMIN");
        
        // 5. 通过ADMIN获取到的User对象、进行判断是否存在
        if(user != null){
            //表示已登录、不再拦截
            log.info("表示已登录、不再拦截");
            return true;
        }
        
        // 6. 已拦截
        request.setAttribute("msg","尚未进行登录");
        log.info("表示未登录、已拦截");
        response.sendRedirect(request.getConetxtPath + "/adminlogin");
        return false;
    }
}

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@Controller
public class UserController {
    @RequestMapping("login")
    public String login(User user, HttpServletRequest request){

        User u = userService.userLogin(user);

        System.out.println("u=" + u);

        // 判断登录是不是管理员
        if (u.getType() == 1){
            //  确定是管理员
            request.getSession().setAttribute("ADMIN",u);
            //  重定向到IndexContrller中的index方法。进入到后台首页
            return "redirect:/index";
        }else  if (u.getType() == 0){
            //  确定是 普通用户
            request.getSession().setAttribute("USER",u);
            //  重定向到IndexContrller中的index/index方法。进入到前台首页
            return "redirect:/index/index";
        }else{
         //  确定是 普通用户
            request.setAttribute("msg","您的账户或密码有误，请检查后登录！");
            return "redirect:/adminlogin";
        }
	}
}



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配置:

@Configuration
public class LoginConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        InterceptorRegistration registration = registry.addInterceptor(new LoginInterceptor());
//  拦截路径: 项目下所有拦截
registration.addPathPatterns("/**");
//  不拦截路径: 
registration.excludePathPatterns("/login,/**/*.html","/**/*.css","/**/*.png","/**/*.js","/**/*.jpg");
    }

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/").setViewName("index");
        registry.addViewController("index.html").setViewName("index");
    }
}

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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>LOGIN</title>
    <link rel="stylesheet" th:href="@{/static/component/style/components.css}" href="../static/component/style/components.css">
    <link rel="stylesheet" th:href="@{/static/css/bootstrap.css}" href="../static/css/bootstrap.css">
    <link rel="stylesheet" th:href="@{/static/css/plugins.css}" href="../static/css/plugins.css">
    <link rel="stylesheet" th:href="@{/static/css/main.css}" href="../static/css/main.css">
    <link rel="stylesheet" th:href="@{/static/css/themes.css}" href="../static/css/themes.css">
    <script th:src="@{/static/component/js/JQuery2.1.4.js}"></script>
    <script th:src="@{/static/component/plugins/layer/layer.js}"></script>
</head>
	<body>
	    <div id="login">
	        <form action="/login" method="post">
	        <div class="center">
	            <dl>
	                <dt><i class="gi gi-leaf"></i>Lover's · <span> BookHouse</span></dt>
	                <dd><span><i class="fa fa-fw fa-user"></i></span><input type="text" name="usercode" placeholder="请输入账号"></dd>
	                <dd><span><i class="fa fa-fw fa-lock"></i></span><input type="password" name="password" placeholder="请输入密码"></dd>
	                <dd><button type="submit">登录</button></dd>
	            </dl>
	        </div>
	   	 </form>
	    </div>
	</body>
</html>
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