JAVA-spring cloud配置文件_jiron-spring-优快云博客

本文详细介绍了SpringBoot结合SpringCloud中七个关键组件的配置方法，包括Eureka服务注册与发现、Config集中配置管理、Feign声明式HTTP调用、Hystrix断路器、Ribbon负载均衡、RestTemplate远程调用以及API网关特性。

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spring boot-spring cloud

1.eureka
- 配置
- 代码
2.config
- 配置
- 代码
3.feign
- 配置
- 代码
4.hystrix
- 配置
- 代码
5.ribbon
- 配置
- 代码
6.resttemplate
- 配置
- 代码
7.网关
- 配置
- 代码

1.eureka

配置

maven

		<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>

yml

server:
  port: 8761

eureka:
  client:
    register-with-eureka: false    #是否将当前的Eureka Server服务作为客户端进行注册
    fetch-registry: false           #是否获取其他Eureka Server服务的数据
    service-url:
      defaultZone: http://localhost:8761/eureka/    #注册中心的访问地址

代码

启动类

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

/**
 * @EnableEurekaServer:声明该类是一个 Eureka Server微服务，提供服务注册和服务发现功能，即注册中心
 */
@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class,args);
    }
}

2.config

配置

maven

		<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>

yml

server:
  port: 8888
spring:
  application:
      name: configserver
  cloud:
    config:
      server:
         git:
          uri: https://github.com/southwind9801/aispringcloud.git
          searchPaths: config
          username: root
          password: root
      label: master
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

代码

启动类


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

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

3.feign

配置

maven

		<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.10</version>
            <scope>provided</scope>
        </dependency>

yml

server:
  port: 8050
spring:
  application:
    name: feign
eureka:
  client:
    service-url:
      defalut: http://localhost:8761/eureka/
    # Eureka服务注册中心会将自己作为客户端来尝试注册它自己，必須禁止 ***
#    register-with-eureka: false
#    fetch-registry: false
  instance:
    prefer-ip-address: true

#是否开启熔断器
feign:
  hystrix:
    enabled: true

代码

启动类


import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.ComponentScan;

/**
 * @EnableFeignClients:
 */
@SpringBootApplication
@EnableFeignClients(basePackages = {"com.haiyou"})
public class FeignApplication {
    public static void main(String[] args) {
        SpringApplication.run(FeignApplication.class,args);
    }
}

4.hystrix

配置

maven

		<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
            <version>2.0.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>

        <!--可视化界面，仪表盘-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>

yml

server:
  port: 8060
spring:
  application:
    name: hystrix
eureka:
  client:
    service-url:
      defaultZoon: http://localhost:8761/eureka/
  instance:
    prefer-ip-address: true

#开启熔断
feign:
  hystrix:
    enabled: true

#是通过hystrix.stream这个节点获取监控的请求数据，提供了可视化的监控界面
#去监控数据的时候访问这个节点，就会将数据都展示出来

#启动成功之后访问，可以监控到数据:  http://localhost:8060/actuator/hystrix.stream
#访问此页面可以看到可视化监控界面，输入要监控的地址节点，即可看到该节点的可视化数据监控：http://localhost:8060/hystrix  将监控页面输入
management:
  endpoints:
    web:
      exposure:
        include: 'hystrix.stream'

代码

启动类


import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
import org.springframework.cloud.openfeign.EnableFeignClients;

/**
 * @EnableCircuitBreaker:声明启用数据监控
 * @EnableHystrixDashboard:声明启用可视化数据监控
 */
@SpringBootApplication
@EnableFeignClients
@EnableCircuitBreaker
@EnableHystrixDashboard
public class HystrixApplication {
    public static void main(String[] args) {
        SpringApplication.run(HystrixApplication.class,args);
    }
}

5.ribbon

配置

maven

		<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>

yml

server:
  port: 8040
spring:
  application:
    name: ribbon
eureka:
  client:
    service-url:
      default: http://localhost:8761/eureka/
  instance:
    prefer-ip-address: true

代码

启动类


import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

/**
 * @LoadBalanced ：声明⼀个基于 Ribbon 的负载均衡。RestTemplate加上注解后，restTemplate对象就具有了负载均衡的能力
 */
@SpringBootApplication
public class RibbonApplication {
    public static void main(String[] args) {
        SpringApplication.run(RibbonApplication.class,args);
    }

    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

6.resttemplate

配置

maven

		<!--无-->

yml

#无

代码

启动类

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

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

    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

7.网关

网关的特点：
1.安全，提供了统一访问入口，降低了服务器受攻击面积
2.提供了统一跨域解决方案
3.提供了统一日志记录操作，可以统一监控
4.提供了统一权限支持
5.提供了微服务限流功能，可以保护微服务，防止雪崩效应发生
6.微服务弯管的最主要作用是整合各个微服务功能，形成一套或者多套系统。

配置

maven

		<!--无-->

yml

#无

代码

启动类

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

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

    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}