idea+spring boot+spring cloud+eureka+gateway整合

1、创建一个maven项目

 

 next

 

Next

 Finish完成.

2、在创建好的maven项目上右键New->Module

 

选择Spring initializr创建eureka注册中心

Next

 

Next

 

Next

 Finish.

打开eureka-service项目下的application.properties配置文件，将.properties重命名为.yml,配置如下

server:
  port: 8001 #端口号

spring:
  application:
    name: eureka-service #服务名称

eureka:
  instance:
    hostname: localhost
  client:
    fetch-registry: false #是否从Eureka Server获取注册信息
    register-with-eureka: false #是否将自己注册到Eureka Server
    service-url:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/ # 服务地址

 然后启动类中增加@EnableEurekaServer注解就可以了

@SpringBootApplication
@EnableEurekaServer
public class EurekaApplication {

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

}

启动,浏览器输入http://localhost:8001看到如下内容说明配置成功

3、创建服务提供者

cloud-demo右键->New->Module 重复第二步时的过程，只是选择下图项目创建

 

完成后打开pom.xml增加如下配置

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.2.1.RELEASE</version>
            <relativePath/> <!-- lookup parent from repository -->
        </parent>
    <artifactId>admin-api</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>admin-api</name>
    <description>admin api</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
    </properties>

    <dependencies>

        <!--新增-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

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

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

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

配置文件application.yml配置

server:
    port: 8081 #端口
spring:
    application:
        name: customer-center #服务名称

eureka:
    client:
        service-url:
            defaultZone: http://localhost:8001/eureka/ #注册中心地址
        

启动，刷新注册中心

成功。 

4、创建gateway服务

重复之前的创建过程，选择Spring Cloud Routing->GateWay

 

创建完成后pom.xml增加如下内容

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.xxxxxx</groupId>
    <artifactId>getway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>getway</name>
    <description>getway</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
    </properties>

    <dependencies>

        <!--新增-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
            <version>2.2.1.RELEASE</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>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>HikariCP</artifactId>
                    <groupId>com.zaxxer</groupId>
                </exclusion>
            </exclusions>
        </dependency>


    </dependencies>

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

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

配置文件application.yml

server:
  port: 8002 # 服务端口
spring:
  application:
    name: gateway-service # 服务名称

  cloud:
    gateway:
      routes:
        - id: customer
          uri: lb://admin-api #eureka注册中心存在的服务名称
          predicates:
            - Path=/api/customer/** #路径配置
          filters:
           - StripPrefix=1     #忽略Path配置的个数，此处为1代表访问/api/customer/**时，会将api忽略，真实的访问地址为lb://admin-api/customer/**,如果为2，则为lb://admin-api/**
        

在customer-center中创建一个controller类提供一个简单的服务接口

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


@RestController
@RequestMapping(value = "customer")
public class UserController {
　　@GetMapping(value = "user")
　　public String user(){
　　　　return "user";
　　}
}

启动gateway服务

在浏览器中输入http://localhost:8002/api/customer/user和http://localhost:8081/customer/user得到的结果项目，说明配置成功

5、编写gateway过滤器

第一种：使用全局GlobalFilter过滤器 

创建AuthorizeFilter类,只需要有@Component注解就可以了

package com.fulugame.filter;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * Created by ShiJiaoYun on 2020/5/13.
 */
@Component
@Slf4j
public class AuthorizeFilter  implements GlobalFilter, Ordered {

    private static final String AUTHORIZE_TOKEN = "token";


    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("使用filter");
        ServerHttpRequest request = exchange.getRequest();
        HttpHeaders headers = request.getHeaders();
        String token = headers.getFirst(AUTHORIZE_TOKEN);
        if (null == token){
            token=request.getQueryParams().getFirst(AUTHORIZE_TOKEN);
        }
        ServerHttpResponse response = exchange.getResponse();
        if (StringUtils.isEmpty(token)){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return  response.setComplete();
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }
}

然后再通过http://localhost:8002/api/customer/user和http://localhost:8002/api/customer/user?token=12121访问就会有两种不同结果

这样同样可以实现过滤器效果