利用SpringCloud搭建一个最简单的微服务框架

1.微服务

微服务主要包含服务注册，服务发现，服务路由，服务配置，服务熔断，服务降级等一系列的服务，而Spring Cloud为我们提供了个一整套的服务；

 

本例子为你提供了最简单的一个服务发现例子，包含服务注册发现spingCloudEurekaServer、服务配置中心spingCloudConfServer、以及一个app应用springCloudApp

2.服务注册与发现

spingCloudEurekaServer

pom.xml

 

<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.caicongyang</groupId>
  <artifactId>spingCloudEurekaServer</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <parent>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-parent</artifactId>
		<version>Angel.SR6</version>
	</parent>
	<dependencies>		
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka-server</artifactId>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

Application.java

 

 

package com.xlin.eureka;

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

/**
 * Spring could EurekaServer程序主入口
 * 
 * @author Administrator
 *
 */
@SpringBootApplication
@EnableEurekaServer
public class Application {
	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}
}

 

application.yml （可用properties替代）

 

server: 
      port: 9999
eureka:
       instance: 
           hostname: 127.0.0.1
       client: 
            registerWithEureka: false
            fetchRegistry: false
            serviceUrl: 
                     defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

 

3.服务配置（全局配置中心）

pom.xml

 

<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.caicongyang</groupId>
	<artifactId>spingCloudConfServer</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<parent>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-parent</artifactId>
		<version>Angel.SR6</version>
	</parent>
	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-config-server</artifactId>
		</dependency>
		<!-- sping cloud 注册服务 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

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

application.java

 

 

package com.xlin.conf;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;

/**
 * Spring could conf程序主入口
 * @author Administrator
 *
 */
@SpringBootApplication
@EnableConfigServer
public class Application {
	public static void main(String[] args) {   
        SpringApplication.run(Application.class,args);   
    }   
}

application.properties

 

 

server.port=8888
spring.cloud.config.server.git.searchPaths=repo
spring.application.name=spingCloudConfServer

 

4.App

pom.xml

 

<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.caicongyang</groupId>
  <artifactId>springCloudApp</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
  	<parent>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-parent</artifactId>
		<version>Angel.SR6</version>
	</parent>
  <properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<java.version>1.7</java.version>
		<java.encoding>UTF-8</java.encoding>
		<springfox.swagger.version>2.2.2</springfox.swagger.version>
	</properties>
  <dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- sping cloud 监控  http://localhost:8080/health -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-config</artifactId>
		</dependency>
		<!-- sping cloud 注册服务 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka</artifactId>
		</dependency>
			<!-- sping cloud 路由 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-hystrix</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger2</artifactId>
			<version>${springfox.swagger.version}</version>
		</dependency>
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger-ui</artifactId>
			<version>${springfox.swagger.version}</version>
		</dependency>
	</dependencies>
	
  
  <build>
		<finalName>spingcould</finalName>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<configuration>
					<source>${java.version}</source>
					<target>${java.version}</target>
					<encoding>${java.encoding}</encoding>
					<showWarnings>true</showWarnings>
				</configuration>
			</plugin>
		</plugins>
	</build>
  
  
</project>

Application.java

 

 

package com.xlin.springCloudApp.main;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

/**
 * Spring could web程序主入口
 * @author Administrator
 *
 */
@Configuration//配置控制  
@EnableAutoConfiguration//启用自动配置  
@ComponentScan(value={"com.xlin.springCloudApp"})//组件扫描  
@EnableDiscoveryClient
public class Application {
	public static void main(String[] args) {   
        //第一个简单的应用，   
        SpringApplication.run(Application.class,args);   
    }   
}

SwaggerConfig.java

 

 

package com.xlin.springCloudApp.conf;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration
@EnableSwagger2
public class xlinConfig {

    @Value("${swagger.ui.enable}") //该配置项在配置中心管理
    private boolean environmentSpecificBooleanFlag;
	
    @Bean
    public Docket docketFactory() {
        return new Docket(DocumentationType.SWAGGER_2).apiInfo(
           new ApiInfo("接口文档", "SpingCloud web接口列表", "1.0", "", "", "", "")).enable(environmentSpecificBooleanFlag);
    }
}

application.properties

 

 

server.port=8080
spring.cloud.config.uri=http://127.0.0.1:8888
spring.cloud.config.name=springCloudApp
spring.cloud.config.profile=${config.profile:dev}
#service discovery url
eureka.client.serviceUrl.defaultZone=http://localhost:9999/eureka/
#service name
spring.application.name=springCloudApp