SpringCloud Alibaba入门教程（详细）

Provider：

pom.xml

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.6.RELEASE</version>
	</parent>


	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.SR1</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-alibaba-dependencies</artifactId>
				<version>0.2.1.RELEASE</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
		</dependency>

		<!-- 使用配置中心方式 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
		</dependency>
		
		<!--sentinel-->
	    <dependency>
	        <groupId>org.springframework.cloud</groupId>
	        <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
	    </dependency>
    
    
	</dependencies>

	<build>
		<finalName>SpringCloudAlibabaProvider</finalName>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

bootstrap.properties

# 这里的应用名对应 Nacos Config 中的 Data ID，
spring.application.name=MyNacosProvider
# 指定配置名为 MyNacosProvider 的配置文件,下面配置是后缀
spring.cloud.nacos.config.file-extension=yaml
# 注册中心 的地址
spring.cloud.nacos.config.server-addr=127.0.0.1:8848

启动类：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient
public class StartApplication {

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

}

Controller：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {

	@Autowired
	private ConfigurableApplicationContext ctx;
	
	@RequestMapping("/test/{id}")
	public String getMsg(@PathVariable Integer id) {
		return "msg "+ id + " >> " + ctx.getEnvironment().getProperty("server.port");
	}
}

Nacos配置信息：

如果做负载需要建多个Data ID

================================================================================================

Consumer：

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.6.RELEASE</version>
	</parent>


	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.SR1</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-alibaba-dependencies</artifactId>
				<version>0.2.1.RELEASE</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
		</dependency>

		<!-- 使用配置中心方式 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
		</dependency>
		
		<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

		<!--sentinel -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
		</dependency>


	</dependencies>


	<build>
		<finalName>SpringCloudAlibabaConsumerTest</finalName>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

bootstrap.properties

# 这里的应用名对应 Nacos Config 中的 Data ID，
spring.application.name=MyNacosFrontendConfig
# 指定配置名为 MyNacosFrontendConfig 的配置文件,下面配置是后缀
spring.cloud.nacos.config.file-extension=yaml
# 注册中心 的地址
spring.cloud.nacos.config.server-addr=127.0.0.1:8848

#spring.cloud.nacos.discovery.server-addr=192.168.220.128:8848

#4、限流监控中心
#spring.cloud.sentinel.transport.dashboard=192.168.220.128:8080
#spring.cloud.sentinel.eager=true

启动类：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class StartApplication {

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

}

Feign：

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@FeignClient(value="MyNacosProvider")
public interface ProviderFeign {

	@RequestMapping("/test/{id}")
	public String getMsg(@PathVariable Integer id);
}

Controller：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.jacky.feign.ProviderFeign;

@RestController
public class FrontendController {
	
	@Autowired
	private ProviderFeign providerFeign;
	
	@RequestMapping("/ftest/{id}")
	public String getMsg(@PathVariable Integer id) {
		return "frontend: "+providerFeign.getMsg(id);
	}
}

Nacos配置信息：