springcloud（八）

阳光穿透心脏的1/2处 2021-11-11 18:02 282阅读 0赞

**背景：基于[springcloud（七）][springcloud]继续**

### 使用路由网关统一管理访问接口 ###

**1. 创建工程spring-cloud-zuul，pom.xml文件依赖**

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.zsx</groupId>
        <artifactId>spring-cloud-zuul</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>spring-cloud-zuul</name>
        <description>Spring Cloud Zuul project</description>
    
        <parent>
            <groupId>com.zsx</groupId>
            <artifactId>spring-cloud-customize-dependencies</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <relativePath>../spring-cloud-customize-dependencies/pom.xml</relativePath>
        </parent>
    
        <dependencies>
            <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-netflix-zuul</artifactId>
            </dependency>
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <configuration>
                        <mainClass>com.zsx.ZuulApplication</mainClass>
                    </configuration>
                </plugin>
            </plugins>
        </build>
    </project>

**2. application.yml文件内容**

spring:
      application.name: spring-cloud-zuul
    server:
      port: 8087
    zuul:
      routes:
        # 以 /api/r 开头的请求都转发给spring-cloud-ribbon
        api-ribbon:
          path: /api/r/**
          serviceId: spring-cloud-ribbon
        # 以 /api/f 开头的请求都转发给spring-cloud-feign
        api-feign:
          path: /api/f/**
          serviceId: spring-cloud-feign
    eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8081/eureka/

**3. 引导类**

package com.zsx;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
    
    @SpringBootApplication
    @EnableEurekaClient
    @EnableZuulProxy
    public class ZuulApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(ZuulApplication.class, args);
        }
    }

**4.  依次启动 启动注册中心，服务提供者、Ribbon消费者、Feign消费者、ZuulApplication引导类**

**5. 查看请求[http://localhost:8087/api/f/feign/hello][http_localhost_8087_api_f_feign_hello]**

![20190806102151383.png][]

![2019080610234670.png][]

**6. 查看请求[http://localhost:8087/api/r/ribbon/hello][http_localhost_8087_api_r_ribbon_hello] **

![20190806102312342.png][]

![20190806102324113.png][]

**到此Zuul的路由功能配置成功 **

**7. 配置Zuul回调**

package com.zsx.config;
    
    import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.http.HttpHeaders;
    import org.springframework.http.HttpStatus;
    import org.springframework.http.MediaType;
    import org.springframework.http.client.ClientHttpResponse;
    
    import java.io.ByteArrayInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    
    @Configuration
    public class FeignFallbackProvider implements FallbackProvider {
    
        @Override
        public String getRoute() {
            // ServiceId，如果需要所有调用都支持回退，则 return "*" 或 return null
            return "spring-cloud-feign";
        }
    
        @Override
        public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
    
            return new ClientHttpResponse() {
                @Override
                public HttpHeaders getHeaders() {
                    // 解决中文乱码问题
                    HttpHeaders headers = new HttpHeaders();
                    headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
                    return headers;
                }
    
                @Override
                public InputStream getBody() throws IOException {
                    return new ByteArrayInputStream("Unable to connect, please check your network".getBytes("utf-8"));
                }
    
                @Override
                public HttpStatus getStatusCode() throws IOException {
                    return HttpStatus.OK;
                }
    
                @Override
                public int getRawStatusCode() throws IOException {
                    return HttpStatus.OK.value();
                }
    
                @Override
                public String getStatusText() throws IOException {
                    return HttpStatus.OK.getReasonPhrase();
                }
    
                @Override
                public void close() {
    
                }
            };
        }
    }

**8. 重启ZuulApplication，停止Feign消费者**

**9. 查看请求[http://localhost:8087/api/f/feign/hello][http_localhost_8087_api_f_feign_hello]**

![20190806114225908.png][]

**到此回调配置成功 **

[springcloud]: https://blog.csdn.net/zsx18273117003/article/details/98501713
[http_localhost_8087_api_f_feign_hello]: http://localhost:8087/api/f/feign/hello
[20190806102151383.png]: /images/20211109/1b352d5235ec4234bad67662efd207f8.png
[2019080610234670.png]: /images/20211109/f5f05002ce044b17907512daffd02d2f.png
[http_localhost_8087_api_r_ribbon_hello]: http://localhost:8087/api/r/ribbon/hello
[20190806102312342.png]: /images/20211109/b24c684cdc0d4f41a25584b9a7ee2f0c.png
[20190806102324113.png]: /images/20211109/f9665457e7434ef39ac5cff895bcc9af.png
[20190806114225908.png]: /images/20211109/fe1933500b4d4beaa1cfea37a0cdf546.png