Springcloud之搭建Zuul

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Zuul主要是做为请求的转发，它根据请求的uri的前缀，转发到注册在eureka对应的服务上。

1.在config-server中添加一下配置

spring:
  profiles: dev

zuul:
  routes:
    api-a:
      path: /wx/**
      serviceId: wechat

此配置表示，如果是zuul的请求，且时 /wx开头的，都会转发到wechat这个服务上。

2.maven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.xichuan.dev</groupId>
	<artifactId>xichuan-zuul</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>xichuan-zuul</name>
	<description>zuul router</description>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.6.RELEASE</version>
		<relativePath></relativePath>
	</parent>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Camden.SR5</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-config-client</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-zuul</artifactId>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

3.添加bootstrap.yml配置

名字必须是bootstrap.yml，因为代表是从config-server拉去配置

server:
  port: 2004

eureka:
  instance:
      preferIpAddress: true
      leaseRenewalIntervalInSeconds: 1
      leaseExpirationDurationInSeconds: 2
      nonSecurePort: ${server.port}
  client:
    serviceUrl:
      defaultZone: http://localhost:2001/eureka/

management:
  security:
    enabled: false


spring:
  application:
    name: xichuan-zuul
  cloud:
    config:
    ##这个profile是在这里配置的
      profile: dev
      discovery:
        enabled: true
        serviceId: xichuan-config-server

4.在启动类中添加注解

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;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
@SpringBootApplication
@EnableZuulProxy
@EnableEurekaClient
@RestController
public class XichuanZuulApplication {

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


	/**
	 * 跨域许可设置，可在zuul中进行统一配置
	 */
	@Bean
	public CorsFilter corsFilter() {
		final UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();
		final CorsConfiguration corsConfig = new CorsConfiguration();
		corsConfig.setAllowCredentials(true);
		corsConfig.addAllowedOrigin("*");
		corsConfig.addAllowedHeader("*");
		corsConfig.addAllowedMethod("OPTIONS");
		corsConfig.addAllowedMethod("HEAD");
		corsConfig.addAllowedMethod("GET");
		corsConfig.addAllowedMethod("PUT");
		corsConfig.addAllowedMethod("POST");
		corsConfig.addAllowedMethod("DELETE");
		corsConfig.addAllowedMethod("PATCH");
		urlBasedCorsConfigurationSource.registerCorsConfiguration("/**", corsConfig);
		return new CorsFilter(urlBasedCorsConfigurationSource);
	}

	@RequestMapping(value = "/")
	public String heartbeat() {
		return "";
	}
}

我们可以看启动日志，从config-server获取配置文件

如果我们直接在浏览器中从config-server获取配置文件也是可以的

在浏览器输入http://localhost:2003/xichuan-zuul/dev

可以看到在eureka中注册到的服务