Spring-Cloud之hello world

一、springboot整合springcloud

建立maven專案作為父工程cloud-parent，並在父工程下建立兩個springboot專案的module：cloud-eureka(註冊中心)、cloud-eureka2(註冊中心2)、cloud-server(服務端),cloud-client(客戶端)專案結構如下：

二、配置cloud-eureka

1、pom檔案(建立工程勾選Cloud Discovery-->Eureka Server)

<?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>
   <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.5.18.RELEASE</version>
      <relativePath/> <!-- lookup parent from repository -->
   </parent>
   <groupId>com.wxx.demo</groupId>
   <artifactId>cloud-server</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <packaging>jar</packaging>
   <name>cloud-server</name>
   <description>Demo project for Spring Boot</description>

   <properties>
      <java.version>1.8</java.version>
      <spring-cloud.version>Edgware.SR5</spring-cloud.version>
   </properties>

   <dependencies>
      <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>
   </build>

</project>
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2、application.properties配置檔案

server.port=8096

eureka.client.registerWithEureka=false
eureka.client.fetchRegistry=false
eureka.client.serviceUrl.defaultZone=http://localhost:8098/eureka/ #配置eureka2的註冊中心地址做叢集處理複製程式碼

3、啟動類配置

package com.wxx.demo;

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

@SpringBootApplication
@EnableEurekaServer//作為Eureka註冊中心
public class CloudServerApplication {

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

}
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4、啟動服務端並訪問：http://localhost:8096/

5、配置cloud-eureka2同上把註冊地址修改為cloud-eureka地址

三、配置cloud-client

1、pom檔案同上配置

<?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>
   <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>2.1.1.RELEASE</version>
      <relativePath/> <!-- lookup parent from repository -->
   </parent>
   <groupId>com.wxx.demo</groupId>
   <artifactId>cloud-client</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>cloud-client</name>
   <description>Demo project for Spring Boot</description>

   <properties>
      <java.version>1.8</java.version>
      <spring-cloud.version>Greenwich.RC2</spring-cloud.version>
   </properties>

   <dependencies>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
      <dependency>
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
      </dependency>
      <dependency>
            <groupId>com.wxx.demo</groupId>
            <artifactId>cloud-server</artifactId>
            <version>0.0.1-SNAPSHOT</version>
      </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>
   </build>

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

</project>
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2、application.properties配置檔案

server.port=8090

spring.application.name=cloud-client
eureka.client.serviceUrl.defaultZone=http://localhost:8096/eureka/  
#eureka.client.serviceUrl.defaultZone=http://localhost:8096/eureka/,http://localhost:8096/eureka/ 服務註冊地址兩種寫法都可以複製程式碼

3、啟動類配置

package com.wxx.demo;

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

@SpringBootApplication
@EnableEurekaClient//Eureka客戶端註解
public class CloudClientApplication {

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

}

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4、客戶端程式碼

package com.wxx.demo.client;

import com.wxx.demo.service.DemoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoClient {

    @Autowired
    private DemoService demoService;

    @GetMapping("/hello")
    public String sayHello(@RequestParam String hello){

        return demoService.sayHello(hello);
    }


}
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5、啟動客戶端專案訪問：http://localhost:8090/hello?hello=%22spring-cloud%22

檢視服務註冊情況