Nacos 记录2 - 入门项目_Java

1. 版本依赖

Spring Cloud Version	Spring Cloud Alibaba Version	Spring Boot Version
Spring Cloud Hoxton.SR3	2.2.1.RELEASE	2.2.5.RELEASE
Spring Cloud Hoxton.RELEASE	2.2.0.RELEASE	2.2.X.RELEASE
Spring Cloud Greenwich	2.1.2.RELEASE	2.1.X.RELEASE
Spring Cloud Finchley	2.0.2.RELEASE	2.0.X.RELEASE
Spring Cloud Edgware	1.5.1.RELEASE	1.5.X.RELEASE

https://github.com/alibaba/spring-cloud-alibaba/wiki/%E7%89%88%E6%9C%AC%E8%AF%B4%E6%98%8E

2. 创建dependecies工程

该工程packaging为pom

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.richard123m.temp</groupId>
    <artifactId>nacos-demo</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>server-provider</module>
    </modules>

    <properties>
        <spring.boot.version>2.2.8.RELEASE</spring.boot.version>
        <spring.cloud.version>Hoxton.RELEASE</spring.cloud.version>
        <swagger.version>2.9.2</swagger.version>
    </properties>


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

    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        <version>2.2.0.RELEASE</version>
    </dependency>

    </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <!-- Compiler 插件，设定JDK版本 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <showWarnings>true</showWarnings>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>

    </build>

</project>

3. 服务提供

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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>nacos-demo</artifactId>
        <groupId>com.richard123m.temp</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>server-provider</artifactId>

    <dependencies>
    <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>

    <!-- nacos -->
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    </dependency>

    </dependencies>

</project>

application.yml

# 总体配置
spring:
  application:
    name: nacos-provider
  cloud:
    nacos:
      discovery:
        server-addr: r123m:8848


# 服务本身配置
server:
  port: 8762
  servlet:
    context-path: /nacos-demo

启动类Application

package com.r123m.nacos.demo;

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

/**
 * @author Richard123m
 * @date 2020-07-26
 */
@EnableDiscoveryClient
@SpringBootApplication
public class NacosDemoApplication {

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

Controller类

package com.r123m.nacos.demo.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author Richard123m
 * @date 2020-07-26
 */
@RestController
public class AbcController {

    @RequestMapping(value = "/hi",method = RequestMethod.GET)
    public String sayHi(String msg){
        return  "Hi! Msg =>"+msg;
    }


}

测试接口

4. 服务消费

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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>nacos-demo</artifactId>
        <groupId>com.richard123m.temp</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>nacos-consumer</artifactId>

    <dependencies>
        <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>

        <!-- nacos -->
        <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-openfeign</artifactId>
        </dependency>

    </dependencies>

</project>

application.yml

# 本地配置
spring:
  application:
    name: nacos-consumer-feign
  cloud:
    nacos:
      discovery:
        server-addr: r123m:8848

server:
  port: 8763

启动类

package com.r123m.nacos.consumer;

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

/**
 * @author Richard123m
 * @date 2020-07-26
 */
@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication
public class NacosConsumerApplication {

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


}

配置服务提供的接口

package com.r123m.nacos.consumer.service;

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

/**
 * @author Richard123m
 * @date 2020-07-26
 */
@FeignClient(value = "nacos-provider")
public interface RemoteService {

    //接口参数要加上@RequestParam，否则会报405 
    @RequestMapping(value = "/nacos-demo/hi",method = RequestMethod.GET)
    String sayHi(@RequestParam("msg") String msg);
}

配置消费端接口

package com.r123m.nacos.consumer.controller;

import com.r123m.nacos.consumer.service.RemoteService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author Richard123m
 * @date 2020-07-26
 */
@RestController
public class ConsumerController {

    @Autowired
    private RemoteService remoteService;

    @RequestMapping(value = "/feign/sayHi",method = RequestMethod.GET)
    public String sayHi(String msg){
         return remoteService.sayHi(msg+" from feign");
    }

}