SpringCloud学习心得（一）构建最基础的SpringCloud项目

首先本系列博客参照史上最简单的 SpringCloud 教程，地址：https://blog.csdn.net/forezp/article/details/70148833

根据工作需要，笔者最近研究SpringCloud微服务框架，将最近的学习过程写下来供大家参考。

好，闲话少叙，咱们直接整

首先本系统采用的springcloud的版本是1.5.9 Dalston.SR5

首先建立服务中心，pom文件如下：

<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>cn.eric</groupId>
<artifactId>eureka-server-eric</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>eurekaserver</name>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath/> 
    </parent>

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

    <dependencies>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-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>Dalston.SR5</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>

配置文件 application.yml

spring:
application:

name: eureka-server

server:

port: 8761

eureka:
instance:
    hostname: localhost
server:
    enableSelfPreservation: true
    renewalPercentThreshold: 0.1
client:
    #通过eureka.client.registerWithEureka：false和fetchRegistry：false来表明自己是一个eureka server.
    registerWithEureka: false
    fetchRegistry: false

建立一个启动类：代码如下：

package cn.eric.springcloud;

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

@EnableEurekaServer //启动一个服务注册中心，只需要一个注解@EnableEurekaServer
@SpringBootApplication
public class EurekaserverApplication {
   public static void main(String[] args) {
       SpringApplication.run(EurekaserverApplication.class, args);
   }
}

启动服务，在浏览器里面输入：http://localhost:8761

界面如下：

服务端启动后，我们来建立一个客户端：

pom文件如下：

<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>cn.eric</groupId>
<artifactId>eureka-server-client-eric</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>eureka-server-client-eric</name>

      <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath/> 
    </parent>

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

    <dependencies>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-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>Dalston.SR5</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>

配置文件如下：

spring:
application:
    name: eureka-server-client1

server:
port: 8762

eureka:
instance:
    hostname: localhost
client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

启动类如下：

package cn.eric.springcloud;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

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

    @Value("${server.port}")
    String port;

    @RequestMapping("/hi")
    public String home(@RequestParam String name) {
       //String port = "8762";
        return "hi "+name+",i am from port:" + port;
    }

}

将客户端启动，在浏览器里打开：http://localhost:8762/hi?name=forezp

SpringCloud学习心得（一） 构建最基础的SpringCloud项目

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SpringCloud学习心得（一）构建最基础的SpringCloud项目