SpringCloud 构建微服务架构-练习

我使用的springboot的版本为2.0.2.RELEASE，这里概念性的东西我就不粘贴复制了，百度一下 都是

一、启动Eureka注册中心服务

　　1、新建springboot项目，pom.xml配置如下：

<?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.joey</groupId>
    <artifactId>Eureka</artifactId>
    <version>1</version>
    <packaging>jar</packaging>

    <name>Eureka-Demo</name>
    <description>Demo project for Spring Cloud</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RC2</spring-cloud.version>
    </properties>

    <dependencies>
        <!-- springCloud 配置 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!-- springCloud注测中心服务 -->
        <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-test</artifactId>
            <scope>test</scope>
        </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>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
            <resource>
                <directory>lib/</directory>
                <targetPath>lib</targetPath>
                <includes>
                    <include>**/*.jar</include>
                </includes>
            </resource>
        </resources>
    </build>
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>

　　2、application.properties的配置如下

#注册中心服务ID
spring.application.name=master
#端口号
server.port=8761
#地址
eureka.instance.hostname=127.0.0.1
# 默认为true：表示是否将自己注册到Eureka Server。由于当前这个应用就是Eureka Server，故而设为false
eureka.client.register-with-eureka=false
# 表示是否从Eureka Server获取注册信息，默认为true。因为这是一个单点的Eureka Server， 不需要同步其他的Eureka Server节点的数据，故而设为false。
eureka.client.fetch-registry=false
# 设置与Eureka Server交互的地址，查询服务和注册服务都需要依赖这个地址。
eureka.client.service-url.defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

　　3、Application的配置如下：

package com.joey;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

/**
 * 微服务 注册中心
 * @author joey
 *
 */
@EnableEurekaServer
@SpringBootApplication
public class Application {

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

　　4、启动服务，访问http://localhost:8761，就可以看见注册中心服务已经启动成功

二、注册服务

　　1、新建两个springboot项目，用于开发服务，端口分别为1111，2222，以下以端口为1111的服务为例

　　pom.xml配置如下

<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.joey</groupId>
    <artifactId>EurekaClientTestA</artifactId>
    <version>1.0</version>
    <packaging>jar</packaging>

    <name>EurekaClientTestA</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RC2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>

        <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-test</artifactId>
            <scope>test</scope>
        </dependency>

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

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>

　　2、application.properties配置如下

#指定微服务的名称后续在调用的时候只需要使用该名称就可以进行服务的访问。
spring.application.name=sp
#端口号
server.port=1111
eureka.instance.hostname=127.0.0.1
eureka.instance.instance-id=${spring.application.name}:${spring.cloud.client.hostname}:${server.port}
#是在注册中心url中不限时ip地址前缀
eureka.instance.prefer-ip-address=false
#在注册中心中进行注册
eureka.client.serviceUrl.defaultZone=http://127.0.0.1:8761/eureka/
#启动服务发现的功能，开启了才能调用其它服务
spring.cloud.config.discovery.enabled=true
#发现的服务的名字--对应注测中心的服务名字
spring.cloud.config.discovery.serviceId=master

　　3、编写一个controller类

package com.joey.Controller;

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

@RestController
public class TestController {

    @RequestMapping(value = "/info", method = RequestMethod.GET)
    public String info() {
        return "hello I am is spring-serviceA"; // 测试代码直接返回一个字符串，不再调用service层等等。
    }

}

　　4、Application配置如下

package com.joey;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

/**
 * 服务提供者A
 * @author joey
 *
 */
@SpringBootApplication
//@EnableEurekaClient  //Eureka服务注册
@EnableDiscoveryClient //适用于所有服务注册
public class Application
{
    public static void main( String[] args )
    {
        SpringApplication.run(Application.class, args);
    }
}

　　5、启动服务，刷新注册中心页面，可以看见服务已经被注册进去了

三、添加只能路由ZUUL

　　1、新建springboot，pom.xml配置如下

<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.joey</groupId>
    <artifactId>Zuul</artifactId>
    <version>1</version>
    <packaging>jar</packaging>

    <name>SpringZUUL</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RC2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </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>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
            <resource>
                <directory>lib/</directory>
                <targetPath>lib</targetPath>
                <includes>
                    <include>**/*.jar</include>
                </includes>
            </resource>
        </resources>
    </build>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>

　　2、application.properties的配置如下

eureka.client.serviceUrl.defaultZone=http://127.0.0.1:8761/eureka/
server.port=8083
spring.application.name=service-zuul
#表示只要访问以/api-a/开头的多层目录都可以路由到 id为sp的服务上
zuul.routes.sp=/test/**  

　　3、Application的配置如下：

package com.joey;

import org.springframework.boot.SpringApplication;
import org.springframework.cloud.client.SpringCloudApplication;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
import org.springframework.context.annotation.Bean;

import com.yunzao.Common.AccessFilter;

/**
 * spring cloud 路由网关服务---Zuul
 *
 */
@EnableZuulProxy
@SpringCloudApplication
public class Application
{
    public static void main( String[] args )
    {
        SpringApplication.run(Application.class,args);
    }

    @Bean
    public AccessFilter accessFilter() {
        return new AccessFilter();
    }
}

　　4、启动服务后，访问http://localhost:8083/test，返回/info接口的信息，且每次访问调用的sp下的不同服务