Idea 创建springcloud 工程

springCloud是基于springboot搭建的微服务。

spring cloud官方文档：http://projects.spring.io/spring-cloud/

spring cloud 中文网 : https://springcloud.cc/

最终搭建后的工程源代码：https://github.com/onpwerb/SpringCloud

一、新建maven工程

根据spring cloud官方文档，在pom.xml导入如下代码

<!-- spring cloud 配置 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.5.RELEASE</version>
    </parent>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Camden.SR6</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>

二、建立注册中心

新建名称为 discovery 的 module

1.在该module下的pom.xml导入如下配置：

<!-- @EnableEurekaServer -->
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-netflix-eureka-server</artifactId>
            <!--<version>1.1.6.RELEASE</version>-->
        </dependency>
    </dependencies>

2.在src/main/java目录下新建discovery文件夹，然后新建一个application

package discovery;

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

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

3.在该module下的src/main/resources文件夹下，新建文件application.yml，配置注册中心eureka的相关服务

server:
  port: 8081
eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

三、构建一个服务A

新建一个名为service的module

1.在src/main/java目录下新建service文件夹，然后新建一个application

package service;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@EnableDiscoveryClient
@RestController
public class ServiceApplication {
    @GetMapping("/service")
    public String service(){
        return "service";
    }

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

2.在该module下的src/main/resources文件夹下，新建文件application.yml

spring:
  application:
    name: service.service
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8081/eureka/
server:
  port: 8082

四、构建第二个服务B

新建一个名为service2的module

1.在src/main/java目录下新建service2文件夹，然后新建一个application

package service2;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@EnableDiscoveryClient
@RestController
public class Service2Application {
    @RequestMapping("/service2")
    public String service2(){
        return "service2";
    }

    public static void main(String[] args) {
        SpringApplication.run(Service2Application.class, args);
    }
}

2.在该module下的src/main/resources文件夹下，新建文件application.yml

spring:
  application:
    name: service2
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8081/eureka/
server:
  port: 8083

五、配置网关

新建名称为 gateway 的 module

1.在该module下的pom.xml导入如下配置：

package gateway;

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

2.在src/main/java目录下新建gateway文件夹，然后新建一个application

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8081/eureka/
spring:
  application:
    name: gateway
server:
  port: 8084
zuul:
  routes:
    service: /service/**
    service2: /service2/**

3.在该module下的src/main/resources文件夹下，新建文件application.yml

六、启动服务

先启动discovery模块，再启动其他模块

在浏览器依次输入：

http://localhost:8081/

http://localhost:8082/service

http://localhost:8083/service2

http://localhost:8084/service/service

http://localhost:8084/service2/service2

Idea 创建springcloud 工程

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