Spring Boot实现登录拦截

￡神魔★判官ぃ 2021-08-30 17:28 365阅读 0赞

**目录**

一 相关配置

二 控制器

三 视图

四 码云地址

--------------------

# **一 相关配置** #

1 登录拦截器

package com.ckf.springbootinterceptor.config;
    
    
    import org.springframework.web.servlet.HandlerInterceptor;
    
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    import java.util.ArrayList;
    import java.util.List;
    
    
    /**
    * @className: LoginInterceptor
    * @description: 登录拦截器
    * @date: 2020/6/16
    * @author: cakin
    */
    public class LoginInterceptor implements HandlerInterceptor {
    
    
    
    
        /**
         * 用于存储排除拦截的url  （登录/login.html, /css,/js,/img）
         */
        private List<String> urls = new ArrayList<>();
    
    
        /**
         * 功能描述：进入控制器之前拦截
         *
         * @param request  请求
         * @param response 响应
         * @param handler  处理
         * @return boolean 是否放行
         * @author cakin
         * @date 2020/6/16
         */
        @Override
        public boolean preHandle( HttpServletRequest request, HttpServletResponse response, Object handler ) throws Exception {
            HttpSession session = request.getSession();
            if (session.getAttribute("username") != null) {
                // 已登录，放行。。
                return true;
            } else {
                System.out.println("你还没登录，没有权限");
                // 未登录，拦截 返回login
                response.sendRedirect("/login");
                return false;
            }
        }
    
    
    
    
        /**
         * 功能描述：设置能通过的url
         *
         * @return List<String>
         * @author cakin
         * @date 2020/6/16
         */
        public List<String> getUrls() {
            urls.add("/login");    // login url请求
            urls.add("/doLogin");  // 登录请求
            urls.add("/no_login");
            urls.add("/swagger-ui.html");
    
    
            // 静态资源
            urls.add("/img/*");
            urls.add("/js/*");
            urls.add("/css/*");
            return urls;
        }
    }

2 Swagger配置

package com.ckf.springbootinterceptor.config;
    
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import springfox.documentation.builders.ApiInfoBuilder;
    import springfox.documentation.builders.PathSelectors;
    import springfox.documentation.builders.RequestHandlerSelectors;
    import springfox.documentation.service.Contact;
    import springfox.documentation.spi.DocumentationType;
    import springfox.documentation.spring.web.plugins.Docket;
    import springfox.documentation.swagger2.annotations.EnableSwagger2;
    
    
    
    
    /**
    * @className: SwaggerConfig
    * @description: Swagger的配置
    * @date: 2020/6/16
    * @author: cakin
    */
    @Configuration
    @EnableSwagger2 // 开启swagger
    public class SwaggerConfig {
        /**
         * 配置Swagger信息
         * http://localhost:8080/swagger-ui.html  请求路径
         * 扫描控制器的包
         *
         * @return Docket
         */
        @Bean
        public Docket createDocketApi() {
            return new Docket(DocumentationType.SWAGGER_2).pathMapping("/").select().apis(RequestHandlerSelectors.basePackage("com.ckf"))
                    .paths(PathSelectors.any())
                    .build().apiInfo(new ApiInfoBuilder()
                            .title("拦截系统项目 API 文档")
                            .description("演示SpringBoot整合Swagger...")
                            .version("2.2.3")
                            .contact(new Contact("cakin", "https://blog.csdn.net/chengqiuming", "798103175@qq.com"))
                            .license("The Apache License")
                            .licenseUrl("https://blog.csdn.net/chengqiuming")
                            .build());
        }
    }

3 MVC配置

package com.ckf.springbootinterceptor.config;
    
    
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
    
    
    /**
    * @className: WebappAdrapter
    * @description: 注册拦截器配置类
    * @date: 2020/6/16
    * @author: cakin
    */
    @Configuration
    public class WebappAdapter implements WebMvcConfigurer {
        /**
         * @className: WebappAdapter
         * @description: 将登录拦截器添加进来
         * addPathPatterns()添加拦截
         * excludePathPatterns（）排除拦截
         * @date: 2020/6/16
         * @author: cakin
         */
        @Override
        public void addInterceptors( InterceptorRegistry registry ) {
            // 实例化登录拦截器，用于注册
            LoginInterceptor loginInterceptor = new LoginInterceptor();
    
    
            /***
             * 所有路径都被拦截  addPathPatterns("/**")
             * 允许通过   excludePathPatterns("/login", "/register")等等
             */
            registry.addInterceptor(loginInterceptor).addPathPatterns("/**")
                    .excludePathPatterns("/swagger-resources/**")
                    .excludePathPatterns(loginInterceptor.getUrls());
            WebMvcConfigurer.super.addInterceptors(registry);
        }
    }

# **二 控制器** #

package com.ckf.springbootinterceptor.controller;
    
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PostMapping;
    
    
    import javax.servlet.http.HttpSession;
    
    
    /**
    * @className: LoginController
    * @description: 登录控制器
    * @date: 2020/6/16
    * @author: cakin
    */
    @Controller
    public class LoginController {
        /**
         * 功能描述：用户登录
         *
         * @param userName 用户名
         * @param password 密码
         * @param session  session
         * @return String 登录页
         * @author cakin
         * @date 2020/6/16
         */
        @PostMapping("/doLogin")
        public String login( String userName, String password, HttpSession session ) {
            if (userName.equals("admin") && password.equals("123456")) {
                session.setAttribute("username", userName);
                //登录成功返回index 否则返回登录
                return "index";
            }
            return "login";
        }
    
    
        /**
         * 功能描述：显示登录页
         *
         * @author cakin
         * @date 2020/6/16
         * @return String 登录页
         */
        @GetMapping("/login")
        public String loginView() {
            return "login";
        }
    
    
        /**
         * 功能描述：显示非法登录页
         *
         * @author cakin
         * @date 2020/6/16
         * @return String 非法页面
         */
        @GetMapping("/no_login")
        public String noLogin() {
            return "no_login";
        }
    
    
        /**
         * 功能描述：显示订单页
         *
         * @author cakin
         * @date 2020/6/16
         * @return String 订单页
         */
        @GetMapping("/orders")
        public String orders() {
            return "orders";
        }
    
    
        /**
         * 功能描述：显示用户页
         *
         * @author cakin
         * @date 2020/6/16
         * @return String 用户页
         */
        @GetMapping("/user")
        public String user() {
            return "user";
        }
    }

# **三 视图** #

1 index.html

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
        测试1
    </body>
    </html>

2 login.html

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>登录</title>
    </head>
    <body>
    <form action="/doLogin" method="post">
        用户名：<input type="text" name="userName"/>
        密码：<input type="password" name="password"/>
        <input type="submit" value="登录">
    </form>
    </body>
    </html>

3 no\_login.html

<!DOCTYPE html>
    <html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
    <span th:text="${session.username}"></span>用户还没登录，没有权限访问！！
    <p>
        <a href="/login">返回登录</a>
    </p>
    </body>
    </html>

4 orders.html

<!DOCTYPE html>
    <html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>订单页面</title>
    </head>
    <body>
    <h1>欢迎来到订单系统</h1>
    </body>
    </html>

5 user.html

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
    <h1>欢迎来到用户管理</h1>
    </body>
    </html>

# **四 码云地址** #

[https://gitee.com/cakin24/springboot-interceptor][https_gitee.com_cakin24_springboot-interceptor]

[https_gitee.com_cakin24_springboot-interceptor]: https://gitee.com/cakin24/springboot-interceptor