1. <dependencies>
    2.     <dependency>
    3.         <groupId>org.springframework.cloud</groupId>
    4.         <artifactId>spring-cloud-starter-gateway</artifactId>
    5.     </dependency>
    6.     <dependency>
    7.         <groupId>com.alibaba.cloud</groupId>
    8.         <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    9.     </dependency>
    10. </dependencies>

    网关服务里 pom.xml里加上如上命令

    yml文件：

    1. server:
    2.   port: 80
    3. spring:
    4.   cloud:
    5.     gateway:
    6.       discovery:
    7.         locator:
    8.           enabled: true  # 启用gateway 服务发现功能
    9.           lower-case-service-id: true  # 启用小驼峰的服务名称访问服务
    10.       routes: # 自定义路由机制
    11.        -id: admin-service-router   # /admin/**--->admin-service
    12.          uri: lb://admin-service
    13.          predicates:
    14.            -Path = admin/**
    15.        -id: member-service-router  # /member/**--->member-service
    16.            uri: lb://member-service
    17.            predicates:
    18.              -Path = member/**
    19.        - id: finance-service-router  # /finance/**--->finance-service
    20.            uri: lb://finance-service
    21.            predicates:
    22.              - Path = finance/**
    23.        - id: chan-service-router    # /chan/**--->chan-service
    24.            uri: lb://chan-service
    25.            predicates:
    26.              - Path = chan/**
    27.        - id: statistics-service-router # /statistics/**--->statistics-service
    28.            uri: lb://statistics-service
    29.            predicates:
    30.              - Path=statistics/**
    31.        - id: match-service-router   # /match/**--->match-service
    32.            uri: lb://match-service
    33.            predicates:
    34.              - Path=match/**
    35.        - id: exchange-service-router  # /exchange/**--->exchange-service
    36.            uri: lb://exchange-service
    37.            predicates:
    38.              - Path=match/**
    39.     nacos:
    40.       server-addr: 192.168.19.128:8848

    config文件夹里有一个解决跨域的类：

    1. package com.oy.config;
    3. import org.springframework.context.annotation.Bean;
    4. import org.springframework.context.annotation.Configuration;
    5. import org.springframework.web.cors.CorsConfiguration;
    6. import org.springframework.web.cors.reactive.CorsWebFilter;
    7. import org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource;
    8. /**
    9.  * 解决跨域问题
    10.  */
    11. @Configuration
    12. public class CorsConfig {
    13.     @Bean
    14.     public CorsWebFilter corsWebFilter(){
    15.         CorsConfiguration corsConfiguration = new CorsConfiguration();
    16.         corsConfiguration.addAllowedHeader("*");
    17.         corsConfiguration.addAllowedOrigin("*");
    18.         corsConfiguration.addAllowedMethod("*");
    19.         UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();
    20.         urlBasedCorsConfigurationSource.registerCorsConfiguration("/**",corsConfiguration);
    21.         return new CorsWebFilter(urlBasedCorsConfigurationSource) ;
    22.     }
    23. }

    JWTFilter: 拦截用户请求，判断用户是否需要token

    1. package com.bjsxt.filter;
    3. import com.alibaba.fastjson.JSONObject;
    4. import org.springframework.beans.factory.annotation.Autowired;
    5. import org.springframework.beans.factory.annotation.Value;
    6. import org.springframework.cloud.gateway.filter.GatewayFilterChain;
    7. import org.springframework.cloud.gateway.filter.GlobalFilter;
    8. import org.springframework.core.Ordered;
    9. import org.springframework.core.io.buffer.DataBuffer;
    10. import org.springframework.data.redis.core.StringRedisTemplate;
    11. import org.springframework.http.HttpHeaders;
    12. import org.springframework.http.HttpStatus;
    13. import org.springframework.http.server.reactive.ServerHttpResponse;
    14. import org.springframework.stereotype.Component;
    15. import org.springframework.util.StringUtils;
    16. import org.springframework.web.server.ServerWebExchange;
    17. import reactor.core.publisher.Flux;
    18. import reactor.core.publisher.Mono;
    19. import java.util.Set;
    21. @Component
    22. public class JwtCheckFilter implements GlobalFilter, Ordered {
    23.     @Autowired
    24.     private StringRedisTemplate redisTemplate ;    
    25.     @Value("${no.require.urls:/admin/login,/user/gt/register,/user/login,/user/users/register,/user/sms/sendTo,/user/users/setPassword}")
    26.     private Set<String> noRequireTokenUris ;
    27.     /**
    28.      * 过滤器拦截到用户的请求后做啥
    29.      * @param exchange
    30.      * @param chain
    31.      * @return
    32.      */
    33.     @Override
    34.     public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
    35.         // 1 : 该接口是否需要token 才能访问
    36.         if(!isRequireToken(exchange)){
    37.             return chain.filter(exchange) ;// 不需要token ,直接放行 
    38.         }
    39.         // 2: 取出用户的token
    40.         String token = getUserToken(exchange) ;
    41.         // 3 判断用户的token 是否有效
    42.         if(StringUtils.isEmpty(token)){
    43.             return buildeNoAuthorizationResult(exchange) ;
    44.         }
    45.         Boolean hasKey = redisTemplate.hasKey(token);
    46.         if(hasKey!=null && hasKey){
    47.             return chain.filter(exchange) ;// token有效 ,直接放行 
    48.         }
    49.         return buildeNoAuthorizationResult(exchange) ;
    50.     }
    51.     /**
    52.      * 给用户响应一个没有token的错误
    53.      * @param exchange
    54.      * @return
    55.      */
    56.     private Mono<Void> buildeNoAuthorizationResult(ServerWebExchange exchange) {
    57.         ServerHttpResponse response = exchange.getResponse();
    58.         response.getHeaders().set("Content-Type","application/json");
    59.         response.setStatusCode(HttpStatus.UNAUTHORIZED) ;
    60.         JSONObject jsonObject = new JSONObject();
    61.         jsonObject.put("error","NoAuthorization") ;
    62.         jsonObject.put("errorMsg","Token is Null or Error") ;
    63.         DataBuffer wrap = response.bufferFactory().wrap(jsonObject.toJSONString().getBytes());
    64.         return response.writeWith(Flux.just(wrap)) ;
    65.     }
    66.     /**
    67.      * 从 请求头里面获取用户的token
    68.      * @param exchange
    69.      * @return
    70.      */
    71.     private String getUserToken(ServerWebExchange exchange) {
    72.         String token = exchange.getRequest().getHeaders().getFirst(HttpHeaders.AUTHORIZATION);
    73.         return token ==null ? null : token.replace("bearer ","") ;
    74.     }
    75.     /**
    76.      * 判断该 接口是否需要token
    77.      * @param exchange
    78.      * @return
    79.      */
    80.     private boolean isRequireToken(ServerWebExchange exchange) {
    81.         String path = exchange.getRequest().getURI().getPath();
    82.         if(noRequireTokenUris.contains(path)){
    83.             return false ; // 不需要token
    84.         }
    85.         return Boolean.TRUE ;
    86.     }
    87.     /**
    88.      * 拦截器的顺序
    89.      * @return
    90.      */
    91.     @Override
    92.     public int getOrder() {
    93.         return 0;
    94.     }
    95. }

    controller:

    1. @RestController
    2. public class GatewayFlowRulesController {
    4.     /**
    5.      * 获取当前系统的限流策略
    6.      */
    8.     @GetMapping("/gw/flow/rules")
    9.     public Set<GatewayFlowRule> getCurrentGatewayFlowRules(){
    10.         return GatewayRuleManager.getRules() ;
    11.     }
    12.     /**
    13.      * 获取我定义的api分组
    14.      */
    15.     @GetMapping("/gw/api/groups")
    16.     public Set<ApiDefinition> getApiGroups(){
    17.         return GatewayApiDefinitionManager.getApiDefinitions() ;
    18.     }
    19. }


    启动类：

    1. @SpringBootApplication
    2. @EnableDiscoveryClient  //注册到nacos
    3. public class GatewayServerApplication {
    5.     public static void main(String[] args) {
    6.         SpringApplication.run(GatewayServerApplication.class ,args) ;
    7.     }
    8. }


    在启动的时候报错：
    image.png
    百度一直说是因为gateway里有webfull包。把这个webfux包排除就好。
    终于启动好。弄了很久

    image.png

    我最后在pom.xml上做的更改： 这样是能启动成功的。

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <project xmlns="http://maven.apache.org/POM/4.0.0"
    3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    5.     <parent>
    6.         <artifactId>coin-iaas</artifactId>
    7.         <groupId>com.bjsxt</groupId>
    8.         <version>1.0</version>
    9.     </parent>
    10.     <modelVersion>4.0.0</modelVersion>
    12.     //之前一直好多包都下不下来，在那个右侧的maven那里报红。加上下面这段代码就好了
    13.     //主要是 <url>http://maven.apache.org</url>, 我在别的项目有看到
    14.     <groupId>com.bjsxt</groupId>
    15.     <artifactId>gateway-server</artifactId>
    16.     <version>1.0-SNAPSHOT</version>
    17.     <name>culture-cloud-gateway</name>
    18.     <url>http://maven.apache.org</url>
    19.     <dependencies>
    20.       //这个依赖我注释掉了。因为spring-cloud-starter-alibaba-nacos-discovery里有引入这个依赖
    21.        <!-- <dependency>
    22.             <groupId>org.springframework.cloud</groupId>
    23.             <artifactId>spring-cloud-starter-gateway</artifactId>
    24.             <exclusions>
    25.                 <exclusion>
    26.                     <groupId>org.springframework.boot</groupId>
    27.                     <artifactId>>spring-boot-starter-webflux</artifactId>
    28.                 </exclusion>
    29.             </exclusions>
    30.         </dependency>-->
    31.         <dependency>
    32.             <groupId>com.alibaba.cloud</groupId>
    33.             <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    34.           <exclusions>
    35.             <exclusion>
    36.               <groupId>org.springframework.boot</groupId>
    37.               <artifactId>>spring-boot-starter-webflux</artifactId>
    38.             </exclusion>
    39.           </exclusions>
    40.         </dependency>
    41.         <dependency>
    42.             <groupId>com.alibaba.cloud</groupId>
    43.             <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
    44.         </dependency>
    45.         <dependency>
    46.             <groupId>com.alibaba.cloud</groupId>
    47.             <artifactId>spring-cloud-alibaba-sentinel-gateway</artifactId>
    48.         </dependency>
    49.         <dependency>
    50.             <groupId>com.alibaba.csp</groupId>
    51.             <artifactId>sentinel-datasource-nacos</artifactId>
    52.         </dependency>
    53.         <dependency>
    54.             <groupId>org.springframework.boot</groupId>
    55.             <artifactId>spring-boot-starter-data-redis</artifactId>
    56.         </dependency>
    57.         <dependency>
    58.             <groupId>com.alibaba.csp</groupId>
    59.             <artifactId>sentinel-spring-cloud-gateway-adapter</artifactId>
    60.             <exclusions>
    61.                 <exclusion>
    62.                     <groupId>org.springframework.boot</groupId>
    63.                     <artifactId>>spring-boot-starter-webflux</artifactId>
    64.                 </exclusion>
    65.             </exclusions>
    66.         </dependency>
    67.         <dependency>
    68.             <groupId>org.springframework.boot</groupId>
    69.             <artifactId>spring-boot-starter-websocket</artifactId>
    70.             <exclusions>
    71.                 <exclusion>
    72.                     <groupId>org.springframework.boot</groupId>
    73.                     <artifactId>>spring-boot-starter-web</artifactId>
    74.                 </exclusion>
    75.             </exclusions>
    76.         </dependency> 
    77. </project>

    接下来我想重现一下出错。看到底是哪个地方出的错：
    我把所有排除webflux的地方一个个注释掉启动都能成功。但是如下，把spring-cloud-starter-gateway这个jar包放开，还是不行。报错在如下图：

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <project xmlns="http://maven.apache.org/POM/4.0.0"
    3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    5.     <parent>
    6.         <artifactId>coin-iaas</artifactId>
    7.         <groupId>com.bjsxt</groupId>
    8.         <version>1.0</version>
    9.     </parent>
    10.     <modelVersion>4.0.0</modelVersion>
    13.     <groupId>com.bjsxt</groupId>
    14.     <artifactId>gateway-server</artifactId>
    15.     <version>1.0-SNAPSHOT</version>
    16.     <name>culture-cloud-gateway</name>
    17.     <url>http://maven.apache.org</url>
    18.     <dependencies>
    19.         <dependency>
    20.             <groupId>org.springframework.cloud</groupId>
    21.             <artifactId>spring-cloud-starter-gateway</artifactId>
    22.            <!-- <exclusions>
    23.                 <exclusion>
    24.                     <groupId>org.springframework.boot</groupId>
    25.                     <artifactId>>spring-boot-starter-webflux</artifactId>
    26.                 </exclusion>
    27.             </exclusions>-->
    28.         </dependency>
    29.         <dependency>
    30.             <groupId>com.alibaba.cloud</groupId>
    31.             <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    32.          <!-- <exclusions>
    33.             <exclusion>
    34.               <groupId>org.springframework.boot</groupId>
    35.               <artifactId>>spring-boot-starter-webflux</artifactId>
    36.             </exclusion>
    37.           </exclusions>-->
    38.         </dependency>
    39.         <dependency>
    40.             <groupId>com.alibaba.cloud</groupId>
    41.             <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
    42.         </dependency>
    43.         <dependency>
    44.             <groupId>com.alibaba.cloud</groupId>
    45.             <artifactId>spring-cloud-alibaba-sentinel-gateway</artifactId>
    46.         </dependency>
    47.         <dependency>
    48.             <groupId>com.alibaba.csp</groupId>
    49.             <artifactId>sentinel-datasource-nacos</artifactId>
    50.         </dependency>
    51.         <dependency>
    52.             <groupId>org.springframework.boot</groupId>
    53.             <artifactId>spring-boot-starter-data-redis</artifactId>
    54.         </dependency>
    55.         <dependency>
    56.             <groupId>com.alibaba.csp</groupId>
    57.             <artifactId>sentinel-spring-cloud-gateway-adapter</artifactId>
    58.            <!-- <exclusions>
    59.                 <exclusion>
    60.                     <groupId>org.springframework.boot</groupId>
    61.                     <artifactId>>spring-boot-starter-webflux</artifactId>
    62.                 </exclusion>
    63.             </exclusions>-->
    64.         </dependency>
    65.         <dependency>
    66.             <groupId>org.springframework.boot</groupId>
    67.             <artifactId>spring-boot-starter-websocket</artifactId>
    68.            <!-- <exclusions>
    69.                 <exclusion>
    70.                     <groupId>org.springframework.boot</groupId>
    71.                     <artifactId>>spring-boot-starter-web</artifactId>
    72.                 </exclusion>
    73.             </exclusions>-->
    74.         </dependency>
    75.     </dependencies>
    76. </project>

    报错图：
    image.png
    image.png

    如下是可以正常启动：把spring-cloud-starter-gateway注释掉。 那引起这个原因其实就是因为spring-cloud-alibaba-sentinel-gateway里有引用spring-cloud-starter-gateway，然后又引用一遍spring-cloud-starter-gateway。重复了。

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <project xmlns="http://maven.apache.org/POM/4.0.0"
    3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    5.     <parent>
    6.         <artifactId>coin-iaas</artifactId>
    7.         <groupId>com.bjsxt</groupId>
    8.         <version>1.0</version>
    9.     </parent>
    10.     <modelVersion>4.0.0</modelVersion>
    13.     <groupId>com.bjsxt</groupId>
    14.     <artifactId>gateway-server</artifactId>
    15.     <version>1.0-SNAPSHOT</version>
    16.     <name>culture-cloud-gateway</name>
    17.     <url>http://maven.apache.org</url>
    18.     <dependencies>
    19.      <!--   <dependency>
    20.             <groupId>org.springframework.cloud</groupId>
    21.             <artifactId>spring-cloud-starter-gateway</artifactId>
    22.             <exclusions>
    23.                 <exclusion>
    24.                     <groupId>org.springframework.boot</groupId>
    25.                     <artifactId>>spring-boot-starter-webflux</artifactId>
    26.                 </exclusion>
    27.             </exclusions>
    28.         </dependency>-->
    29.         <dependency>
    30.             <groupId>com.alibaba.cloud</groupId>
    31.             <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    32.          <!-- <exclusions>
    33.             <exclusion>
    34.               <groupId>org.springframework.boot</groupId>
    35.               <artifactId>>spring-boot-starter-webflux</artifactId>
    36.             </exclusion>
    37.           </exclusions>-->
    38.         </dependency>
    39.         <dependency>
    40.             <groupId>com.alibaba.cloud</groupId>
    41.             <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
    42.         </dependency>
    43.         <dependency>
    44.             <groupId>com.alibaba.cloud</groupId>
    45.             <artifactId>spring-cloud-alibaba-sentinel-gateway</artifactId>
    46.         </dependency>
    47.         <dependency>
    48.             <groupId>com.alibaba.csp</groupId>
    49.             <artifactId>sentinel-datasource-nacos</artifactId>
    50.         </dependency>
    51.         <dependency>
    52.             <groupId>org.springframework.boot</groupId>
    53.             <artifactId>spring-boot-starter-data-redis</artifactId>
    54.         </dependency>
    55.         <dependency>
    56.             <groupId>com.alibaba.csp</groupId>
    57.             <artifactId>sentinel-spring-cloud-gateway-adapter</artifactId>
    58.            <!-- <exclusions>
    59.                 <exclusion>
    60.                     <groupId>org.springframework.boot</groupId>
    61.                     <artifactId>>spring-boot-starter-webflux</artifactId>
    62.                 </exclusion>
    63.             </exclusions>-->
    64.         </dependency>
    65.         <dependency>
    66.             <groupId>org.springframework.boot</groupId>
    67.             <artifactId>spring-boot-starter-websocket</artifactId>
    68.            <!-- <exclusions>
    69.                 <exclusion>
    70.                     <groupId>org.springframework.boot</groupId>
    71.                     <artifactId>>spring-boot-starter-web</artifactId>
    72.                 </exclusion>
    73.             </exclusions>-->
    74.         </dependency>
    75.     </dependencies>
    77. </project>

    image.png