springcloud整合gateway怎么实现网关

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1.项目目录：

创建项目gateway作为父类

2.代码实现：

父类依赖

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.cxh</groupId>
    <artifactId>gateway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gateway</name>
    <description>Demo project for Spring Boot</description>
    <packaging>pom</packaging>
    <properties>
        <java.version>8</java.version>
        <spring-cloud-alibaba-dependencies.version>2021.1</spring-cloud-alibaba-dependencies.version>
        <spring-cloud-dependencies.version>2021.0.0</spring-cloud-dependencies.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud-dependencies.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba-dependencies.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

创建module项目gateway-client

添加依赖

<parent>
        <groupId>com.cxh</groupId>
        <artifactId>gateway</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.cxh</groupId>
    <artifactId>gateway-client</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gateway-client</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!--服务注册-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>0.2.1.RELEASE</version>
        </dependency>
        <!--服务调用-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

    </dependencies>

yml配置

server:
  port: 8002

spring:
  application:
    name: gateway-client #服务名
  profiles:
    active: dev #环境设置
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848 #nacos服务注册

控制层

@RestController
public class ClientController {

    @Value("${server.port}")
    private String port;

    @RequestMapping("/index")
    public String index(){
        return "gateway-client端口：" + port;
    }
}

启动类添加注解

@SpringBootApplication
@EnableDiscoveryClient
public class GatewayClientApplication {

    public static void main(String[] args) {
        SpringApplication.run(GatewayClientApplication.class, args);
    }

}

创建module项目gateway-service

添加依赖

<parent>
        <groupId>com.cxh</groupId>
        <artifactId>gateway</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.cxh</groupId>
    <artifactId>gateway-service</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gateway-service</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
            <version>3.0.4</version>
        </dependency>
        <!--服务注册/发现中心依赖-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <!--服务的配置中心依赖-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
            <version>1.4.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-loadbalancer</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            <version>2.2.10.RELEASE</version>
        </dependency>


    </dependencies>

yml配置

server:
  port: 8001

spring:
  application:
    name: gateway-service #服务名
  profiles:
    active: dev #环境设置
  cloud:
    gateway:
      routes:
        # 透传服务
        - id: gateway-client #设置路由id
          uri: lb://gateway-client  #设置路由的url lb://nacos服务注册名称
          predicates:
            - Path=/client/** #路径匹配规则
          filters:
            - StripPrefix=1

跨域配置

@Configuration
public class CorsConfig {
    @Bean
    public CorsWebFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        config.addAllowedMethod("*");
        config.addAllowedOrigin("*");
        config.addAllowedHeader("*");

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
        source.registerCorsConfiguration("/**", config);

        return new CorsWebFilter(source);
    }
}

3.实现效果：

启动nacos后，再启动gateway-client, gateway-service项目，打开浏览器http://localhost:8001/client/index

返回信息：gateway-client端口：8002

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