Springboot登录拦截器

    <dependencies>
        <dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-starter-thymeleaf</artifactid>
        </dependency>
        <dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-starter-web</artifactid>
        </dependency>
       
        <!--swagger api 依赖 -->
        <dependency>
            <groupid>io.springfox</groupid>
            <artifactid>springfox-swagger2</artifactid>
            <version>2.9.2</version>
        </dependency>

        <dependency>
            <groupid>io.springfox</groupid>
            <artifactid>springfox-swagger-ui</artifactid>
            <version>2.9.2</version>
        </dependency>


        <dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-starter-test</artifactid>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupid>org.junit.vintage</groupid>
                    <artifactid>junit-vintage-engine</artifactid>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

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;

/**
 * 登录拦截器
 */
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<string>();

    /**
     * 进入控制器之前拦截
     */
    @override
    public boolean prehandle(httpservletrequest request, httpservletresponse response, object handler) throws exception {

        httpsession session = request.getsession();
        if (session.getattribute("admin") != null) {
            //已登录，放行。。
            return true;
        } else {

            system.out.println("你还没登录，没有权限");
           /* response.sendredirect("/no_login");*/
      /*  session.setattribute("no_login",session);
            request.setattribute("msg", "没有权限，先登录");*/
            //未登录，拦截 返回login
            response.sendredirect("/login");    //未登录，拦截跳转到登录页
            return false;

        }
    }


    /*设置能通过的url*/
    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;
    }
}

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;

/**
 * 注册拦截器配置类
 */
@configuration
public class webappadrapter implements webmvcconfigurer {

    /**
     * 将登录拦截器添加进来
     * addpathpatterns()添加拦截
     * excludepathpatterns（）排除拦截
     */
    @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")
         */
        registry.addinterceptor(logininterceptor).addpathpatterns("/**").excludepathpatterns("/swagger-resources/**").excludepathpatterns(logininterceptor.geturls());
        webmvcconfigurer.super.addinterceptors(registry);

    }
}