6.SpringCloud zuul搭建

1.路由网关?
a.网关是系统的唯一对外的入口,介于客户端和服务端之间的中间层,
处理非业务功能;
2.为什么使用微服务网关？
1.不同的微服务有不同的的网络地址，
而客户端可能需要调用多个服务接口才能完成一个业务需求，
客户端和各个客户端通信可能会存在:
a.客户端多次请求不同微服务，增加了客户端的复杂性；

3.网关的优点
1.所有的外部请求先经过微服务网关进行交互，
无需调用特定微服务接口,简化了开发;
2.服务网关=路由转发+过滤器
a.路由转发：接收请求,转发到后端的微服务上;
b.过滤器:可在服务网关中可以完成一系列的横切功能(权限校验)
4.网关缺点：
1.增加了网关，多了一层转发，性能会下降一些;

5.搭建zuul项目
1.创建父项目(tour-parent)
  a.添加依赖
2.创建子模块eureka注册中心(tour-eureka-server)
   a.配置eureka server
   b.启动eureka server
3.创建服务提供者模块(tour-account-service)
  a.提供服务将服务注册到eureka注册中心
  b.启动eureka服务
4.创建服务消费者模块(tour-account-web)
  a.消费服务
  b.启动消费者
5.创建zuul子模块
a.添加依赖
b.配置zuul
c.启动
1-4：https://blog.csdn.net/qq_29393273/article/details/99967213

创建zuul子项目

1.在父项目中添加依赖添加zuul 依赖

<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.tour</groupId>
  <artifactId>tour-parent</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>
  <!-- 将当前项目作为一个springboot-starter的子模块 -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.0.RELEASE</version>
  </parent>  
   <modules>
  	<module>tour-online-web</module>
  	<module>tour-eureka-server</module>
  	<module>tour-account-service</module>
  	<module>tour-common</module>
  	<module>tour-presist</module>
  	<module>tour-model</module>
  	<module>tour-zuul-server</module> 
   </modules>
  <properties>
  	<java.version>1.8</java.version>
  	<spring-cloud.version>Hoxton.M3</spring-cloud.version>
  	<fastjson.version>1.2.62</fastjson.version>
  	<mybatis-plus.version>3.2.0</mybatis-plus.version>
  	<oracle.version>8.0.0</oracle.version>
  </properties>  
  <dependencies> 
  <!-- oracle 驱动包 -->
  	<dependency>
		<groupId>oracle</groupId>
  		<artifactId>ojdbc8</artifactId>	  
		<version>${oracle.version}</version>
		<scope>compile</scope>
	</dependency>
    <!-- mybatis plus -->
    <dependency>
	    <groupId>com.baomidou</groupId>
	    <artifactId>mybatis-plus-boot-starter</artifactId>
	    <version>${mybatis-plus.version}</version>
	</dependency>
    
	<!-- fastjson  -->
	<dependency>
	    <groupId>com.alibaba</groupId>
	    <artifactId>fastjson</artifactId>
	    <version>${fastjson.version}</version>
	</dependency>  
    <!-- lombok -->
  	<dependency>
	    <groupId>org.projectlombok</groupId>
	    <artifactId>lombok</artifactId>
	    <scope>provided</scope>
	</dependency>
	    
	<!-- springboot 单元测试 -->
	<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>
	<!-- eureka server -->
	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
	</dependency>
	<!-- eureka client -->
	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
	</dependency>
	<!--zuul-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
  </dependencies>
  <!-- springCloud -->
  	<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>
   <repositories>
		<repository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/milestone</url>
		</repository>
	</repositories>  
 
   <!--配置信息
     id: 不同环境Profile的唯一id;
     properties:properties下可以自定义多个字段(名字随便取，可以有多个);
     activation:用来指定激活方式，可以根据jdk环境，环境变量，文件的存在或缺失;
   -->
    <profiles>
        <!--开发环境-->
        <profile>
            <!--环境标识-->
            <id>dev</id>
            <activation>
                <!--默认激活：如果在不指定profile时默认是开发环境-->
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <profiles.active>dev</profiles.active>
                <server.account.port>9092</server.account.port>
                <server.online.port>9093</server.online.port>
                <server.eureka.port>9090</server.eureka.port>
                <server.zuul.port>9091</server.zuul.port>
                <eureka.host>127.0.0.1</eureka.host>
                <!-- 数据库相关 -->
                <spring.datasource.url>jdbc:oracle:thin:@10.103.32.24:1521:onlinetest</spring.datasource.url>
                <spring.datasource.driverClassName>oracle.jdbc.driver.OracleDriver</spring.datasource.driverClassName>
                <spring.datasource.username>onlinetest</spring.datasource.username>
                <spring.datasource.password>onlinetest438</spring.datasource.password>
            </properties>
        </profile>
        <!--测试环境-->
        <profile>
            <id>test</id>
            <activation>
                <activeByDefault>false</activeByDefault>
            </activation>
            <properties>
                <spring.profiles.active>test</spring.profiles.active>
                <server.account.port>9092</server.account.port>
                <server.online.port>9093</server.online.port>
                <server.eureka.port>9090</server.eureka.port>
                <server.zuul.port>9091</server.zuul.port>
                <eureka.host>127.0.0.1</eureka.host>
            </properties>
        </profile>
        <!--生产环境-->
        <profile>
            <id>pro</id>
            <activation>
                <activeByDefault>false</activeByDefault>
            </activation>
            <properties>
                <spring.profiles.active>pro</spring.profiles.active>
                <server.account.port>9092</server.account.port>
                <server.online.port>9093</server.online.port>
                <server.eureka.port>9090</server.eureka.port>
                <server.zuul.port>9091</server.zuul.port>
                <eureka.host>127.0.0.1</eureka.host>
            </properties>
        </profile>
    </profiles>
</project>

2.配置

#application.properties
#端口号
[email protected]@
#配置应用名称
spring.application.name=tour-zuul-server
#eureka
eureka.client.service-url.defaultZone=http://@eureka.host@:@server.eureka.port@/eureka
#zuul
#前缀
#zuul.prefix=/tour
zuul.routes.account.path=/account/**
zuul.routes.account.service-id=tour-account-service
zuul.routes.online.path=/online/**
zuul.routes.online.service-id=tour-online-web

application.yml 版
#端口号
server:
  port: "@server.zuul.port@"
#应用名称
spring:
  application:
    name: tour-online-web
#eureka
eureka:
  client:
    service-url:
      defaultZone: http://@eureka.host@:@server.zuul.port@/eureka
#zuul
zuul:
  #prefix: tour
  routes:
    account: 
      path: /account/**
      service-id: tour-account-service
    online:
      path: /online/**
      service-id: tour-online-web

3.启动

@SpringBootApplication
@EnableZuulProxy
public class ZuulApplication {
    public static void main(String[] args) {
        SpringApplication.run(ZuulApplication.class,args);
    }
}

访问：http://localhost:zuul模块端口/online/hello

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6.SpringCloud zuul搭建

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