1、Nacos本地安装和启动
git clone https:
//github.com/alibaba/nacos.git
inux/Unix/Mac系统
启动命令(standalone代表着单机模式运行,非集群模式):
sh startup.sh -m standalone
Windows系统
启动命令:cmd startu.cmd
由于在1.3.2之后默认使用的【集群方式】启动我们要手动改回单机模式,如果你非要用高版本,需要修改启动命令,改为【单机模式】右键点击startup.cmd选择编辑
Nacos启动失败问题
https://blog.csdn.net/qq_41965041/article/details/113714859
或者双击startup.cmd运行文件
应用启动之后,访问 http://127.0.0.1:8848/nacos/,Nacos0.8 版本已经支持简单登录功能,默认用户名/密码为: nacos/nacos。
2、集成 Spring Cloud 服务发现
1)、服务提供者 provider2004
i)、 pom.xml
<?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.sc</groupId>
<artifactId>provider2004</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>provider2004</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-alibaba.version>2.2.2.RELEASE</spring-cloud-alibaba.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</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.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring-cloud-alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
</project>
ii)、 application.properties 注册到 Nacos
# 应用名称
spring.application.name=provider2004
# 应用服务 WEB 访问端口
server.port=2004
# Nacos帮助文档: https://nacos.io/zh-cn/docs/concepts.html
# Nacos认证信息
spring.cloud.nacos.discovery.username=nacos
spring.cloud.nacos.discovery.password=nacos
# Nacos 服务发现与注册配置,其中子属性 server-addr 指定 Nacos 服务器主机和端口
spring.cloud.nacos.discovery.server-addr=http://127.0.0.1:8848
# 注册到 nacos 的指定 namespace,默认为 public
spring.cloud.nacos.discovery.namespace=public
iii)、 Provider2004Application 启动类
@EnableDiscoveryClient
@RestController
@SpringBootApplication
public class Provider2004Application {
public static void main(String[] args) {
SpringApplication.run(Provider2004Application.class, args);
}
@RequestMapping(value = "/hello/{string}",method = RequestMethod.GET)
public String echo(@PathVariable String string){
return " from provider2004 Hello "+string;
}
}
2)、服务消费者
i)、 pom.xml
<?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.sc</groupId>
<artifactId>consumer2005</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>consumer2005</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-alibaba.version>2.2.2.RELEASE</spring-cloud-alibaba.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>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
</dependency>
<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>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring-cloud-alibaba.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.sc.consumer2005.Consumer2005Application</mainClass>
</configuration>
<executions>
<execution>
<id>repackage</id>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
ii)、 application.properties 订阅到 Nacos
spring.application.name=consumer2005
# 应用服务 WEB 访问端口
server.port=2005
# Nacos帮助文档: https://nacos.io/zh-cn/docs/concepts.html
# Nacos认证信息
spring.cloud.nacos.discovery.username=nacos
spring.cloud.nacos.discovery.password=nacos
# Nacos 服务发现与注册配置,其中子属性 server-addr 指定 Nacos 服务器主机和端口
spring.cloud.nacos.discovery.server-addr=http://127.0.0.1:8848
# 注册到 nacos 的指定 namespace,默认为 public
spring.cloud.nacos.discovery.namespace=public
iii)、启动类,调用提供者
@EnableDiscoveryClient
@SpringBootApplication
public class Consumer2005Application {
public static void main(String[] args) {
SpringApplication.run(Consumer2005Application.class, args);
}
@LoadBalanced
@Bean
public RestTemplate restTemplate(){
return new RestTemplate();
}
}
iiii)、RestTemplate调服
@RestController
public class TestController {
@Autowired
private RestTemplate restTemplate;
@RequestMapping(value = "/hello/{str}",method = RequestMethod.GET)
public String echo(@PathVariable String str){
return restTemplate.getForObject("http://provider2004/hello/"+str,String.class);
}
}
注:参考如下服务名
转
Spring Cloud 服务注册和发现组件