1.创建一个config-server服务
1.1 bootstrap.yml(优先加载权)
server:
port: 8091
spring:
cloud:
config:
uri: http://localhost:8090/ #config-server的服务地址
profile: dev
label: master
application:
name: config-server
management:
security:
enabled: false
1.2 依赖
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--当git/svn中的配置文件改变时,动态的刷新获取数据-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
1.3 启动类
package com.transsion;
import jdk.nashorn.internal.ir.annotations.Reference;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
@SpringBootApplication
public class ConfigClientApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigClientApplication.class, args);
}
}
1.4 增加controller类访问配置文件的数据
启动项目,访问地址http://localhost:8091/config即可以找到配置文件中对应id的值。为1。
package com.transsion;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RefreshScope
public class ClientController {
@Value("${id}") //用于获取在git仓库中的配置文件的属性。
private String id;
@RequestMapping("/config")
public String getConfig() {
return this.id;
}
}
1.5 常见错误:Could not resolve placeholder
client的spring.application.name和profile与server一致,并且在配置文件中有该属性(Key)
1.6配置中心的动态刷新
a.单个客户端刷新
1.在config-client工程中增加依赖:spring-boot-starter-actuator
2. 在需要刷新配置的类上,使用注解:@RefreshScope
3. 在config-client的配置文件中,加入:management.security.enabled=false
4.调用http://localhost:8881/refresh接口
关闭鉴权,这样才能post请求访问 当前项目/refresh 接口的时候更新配置文件,否则需要Authorization头
b.使用spring cloud bus + rabbitmq 实现多个客户端刷新
1.在config-client 和 config-client2中增加依赖:spring-cloud-starter-bus-amqp
2.安装rabbitmq并运行:https://www.rabbitmq.com/download.html
执行$RABBITMQ_HOME/sbin/rabbitmq-server来启动rabbitmq,rabbitmq的默认用户和密码都是guest,而默认端口是5672
3.配置文件:rabbitmq:
host: localhost
port: 5672
username: guest
password: guest
4.使用post方式请求任一客户端的/bus/refresh接口,就会更新所有客户端的配置
转载于:https://www.cnblogs.com/rainsakura/p/10407171.html