1、新增spring boot，导包

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-oauth2</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-security</artifactId>
</dependency>
<!-- redis  -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
    <exclusions>
        <exclusion>
            <groupId>io.lettuce</groupId>
            <artifactId>lettuce-core</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
</dependency>

配置类
package com.springcloud.newapi.oauthconfig;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.oauth2.config.annotation.configurers.ClientDetailsServiceConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableAuthorizationServer;
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerEndpointsConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerSecurityConfigurer;
import org.springframework.security.oauth2.provider.token.TokenStore;
import org.springframework.security.oauth2.provider.token.store.redis.RedisTokenStore;

@Configuration
@EnableAuthorizationServer
public class AuthorizationServerConfig extends AuthorizationServerConfigurerAdapter {

    // 该对象用来支持 password 模式
     @Autowired
    AuthenticationManager authenticationManager;
//     // 该对象用来将令牌信息存储到内存中
//     @Autowired(required = false)
//     TokenStore inMemoryTokenStore;// 该对象将为刷新token提供支持
// 该对象用来将令牌信息存储到Redis中
        @Autowired
RedisConnectionFactory redisConnectionFactory;

    @Autowired
    UserDetailsService userDetailsService;
    // 指定密码的加密方式
    @Bean
      PasswordEncoder passwordEncoder() {
     // 使用BCrypt强哈希函数加密方案（密钥迭代次数默认为10）
     return new BCryptPasswordEncoder();
     }
     // 配置 password 授权模式
    @Override
         public void configure(ClientDetailsServiceConfigurer clients)throws Exception {
          clients.inMemory().withClient("password").authorizedGrantTypes("password", "refresh_token") //授权模式为password和refresh_token两种
              .accessTokenValiditySeconds(1800) // 配置access_token的过期时间
              .resourceIds("rid") //配置资源id
              .scopes("all")
              .secret("$2a$10$RMuFXGQ5AtH4wOvkUqyvuecpqUSeoxZYqilXzbz50dceRsga.WYiq"); //123加密后的密码
}
@Override
public void configure(AuthorizationServerEndpointsConfigurer endpoints) {
//endpoints.tokenStore(inMemoryTokenStore) //配置令牌的存储（这里存放在内存中）
    endpoints.tokenStore(new RedisTokenStore(redisConnectionFactory)) //配置令牌存放在Redis中
.authenticationManager(authenticationManager)
.userDetailsService(userDetailsService);
}
@Override
public void configure(AuthorizationServerSecurityConfigurer security) {
// 表示支持 client_id 和 client_secret 做登录认证
security.allowFormAuthenticationForClients();
}
}

package com.springcloud.newapi.oauthconfig;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;

@Configuration
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Bean
    @Override
    protected UserDetailsService userDetailsService() {

        return super.userDetailsService();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication()
                .withUser("admin")
                .password("$2a$10$RMuFXGQ5AtH4wOvkUqyvuecpqUSeoxZYqilXzbz50dceRsga.WYiq") //123
                .roles("admin")
                .and()
                .withUser("sang")
                .password("$2a$10$RMuFXGQ5AtH4wOvkUqyvuecpqUSeoxZYqilXzbz50dceRsga.WYiq") //123
                .roles("user");
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.antMatcher("/oauth/**").authorizeRequests()
                .antMatchers("/oauth/**").permitAll()
                .and().csrf().disable();
    }
}

微服务配置

package com.springcloud.newapi.oauthconfig;

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer;
import org.springframework.security.oauth2.config.annotation.web.configuration.ResourceServerConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configurers.ResourceServerSecurityConfigurer;

@Configuration
@EnableResourceServer
public class ResourceServerConfig extends ResourceServerConfigurerAdapter {

    @Override
    public void configure(ResourceServerSecurityConfigurer resources) {

        resources.resourceId("rid") // 配置资源id，这里的资源id和授权服务器中的资源id一致
                .stateless(true); // 设置这些资源仅基于令牌认证
    }

    // 配置 URL 访问权限
    @Override
    public void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                .antMatchers("/admin/**").hasRole("admin")
                .antMatchers("/user/**").hasRole("user")
                .anyRequest().authenticated();
    }
}

package com.springcloud.newapi.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @GetMapping("/admin/hello")
    public String admin() {
        return "hello admin";
    }

    @GetMapping("/user/hello")
    public String user() {
        return "hello user";
    }

    @GetMapping("/hello")
    public String hello() {
        return "hello";
    }
}