springcloud入门案例-优快云博客

本文链接：https://blog.youkuaiyun.com/ProgramApeOfHeaven/article/details/116664721

文章目录

推荐导航
一、入门代码
- 1.方式一:eureka + Feign

一、入门代码

1.方式一:eureka + Feign

1.创建项目

创建EurekaServer项目

创建(consumer/producer 客户端和服务端)

consumer/producer 需要单独导入包feign

      <!-- feign微服务调用 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

注意: 一共创建了3个项目 (eureka service 注册中心,consumer, producer )

2.写代码和配置

a.EurekaServer服务的

启动类SpringcloudDemoApplication

package com.ganyz.springclouddemo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

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

配置application.yml

spring:
  application:
    name: my-eureka

#服务端口
server:
  port: 10211

# 注册中心地址
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10211/eureka
    register-with-eureka: true  
    fetch-registry: true
  instance:
    prefer-ip-address: true
    hostname: eureka1

b.Consumer服务

启动类SpringcloudConsumerApplication

@SpringBootApplication
@EnableFeignClients //允许服务调用
@EnableEurekaClient //允许注册到注册中心
public class SpringcloudConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringcloudConsumerApplication.class, args);
    }
}

配置application.yml

spring:
  application:
    name: springcloud-consumer

#服务端口
server:
  port: 10213

# 注册中心地址
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10211/eureka
    register-with-eureka: true
    fetch-registry: true
  instance:
    prefer-ip-address: true
    hostname: eureka3

代码

@Controller
public class HelloWorldController {
    @Autowired
    private HelloConsumer helloConsumer;
    @RequestMapping("/hello2")
    @ResponseBody
    public String hello2(){
        System.out.println("执行hello2:" + helloConsumer);
        return helloConsumer.hello();
    }
}

@FeignClient(value = "springcloud-producer")  //调用的服务名称, 对应spring.application.name
public interface HelloConsumer {
    @RequestMapping("/hello")
    String hello();
}

c.producer

启动类SpringcloudProducerApplication

@SpringBootApplication
@EnableFeignClients //允许服务调用
@EnableEurekaClient //允许注册到注册中心
public class SpringcloudProducerApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringcloudProducerApplication.class, args);
    }
}

配置application.yml

spring:
  application:
    name: springcloud-producer

#服务端口
server:
  port: 10212

# 注册中心地址
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10211/eureka
    register-with-eureka: true
    fetch-registry: true
  instance:
    prefer-ip-address: true
    hostname: eureka2

代码

@Controller
public class HelloWorldController {
    @RequestMapping("/hello")
    @ResponseBody
    public String hello(){
        System.out.println("hello=====");
        return "hello";
    }
}

3.启动EurekaServer服务

启动SpringcloudDemoApplication 类
访问: http://localhost:10211/ 查看注册情况

4.pom文件的坐标

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.ganyz</groupId>
    <artifactId>springcloud-producer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springcloud-producer</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.3.7.RELEASE</spring-boot.version>
        <spring-cloud.version>Hoxton.SR9</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-client</artifactId>
        </dependency>

        <!-- feign微服务调用 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.7.RELEASE</version>
                <configuration>
                    <mainClass>com.ganyz.springcloudproducer.SpringcloudProducerApplication</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>