nacos作為注冊中心使用執行個體

實作效果

member會員服務調用coupon優惠券服務,查詢使用者所擁有的優惠券

導入依賴包

<!-- 導入服務發現包,這樣能擷取注冊中心中的微服務-->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!-- openfeign實作遠端調用和負載均衡-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>

編寫接口,告訴springcloud這個接口需要調用遠端服務(聲明接口中的每個方法分别調用了哪個遠端服務的哪個請求)

package com.kenai.gulimall.member.feign;
import com.kenai.common.utils.R;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;

//表明自己是一個會調用coupon服務的Feign用戶端
@FeignClient("gulimall-coupon")     

public interface CouponFeignService {
//    聲明要調用哪個服務的哪個功能，并完整複制該方法的路徑名及方法名（簽名）
    @RequestMapping("/coupon/coupon/member/list")   //聲明要調用遠端服務的哪個方法
    public R memberCoupons();
}

在啟動類中開啟遠端調用服務

package com.kenai.gulimall.member;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;

@EnableDiscoveryClient
@SpringBootApplication
// 開啟feign遠端調用功能，所有遠端調用接口放在basePackages指定包下
@EnableFeignClients(basePackages = "com.kenai.gulimall.member.feign")
public class GulimallMemberApplication {
	public static void main(String[] args) {
		SpringApplication.run(GulimallMemberApplication.class, args);
	}
}

coupon優惠券服務查詢優惠券代碼

@RestController
@RequestMapping("coupon/coupon")
public class CouponController {
    @Autowired
    private CouponService couponService;

    @RequestMapping("/member/list")
    public R membercoupons(){
        CouponEntity couponEntity = new CouponEntity();
        couponEntity.setCouponName("滿100減10");
        return R.ok().put("coupons", Arrays.asList(couponEntity));
    }
}

member會員服務遠端調用coupon服務,查詢使用者優惠券代碼

@RestController
@RequestMapping("member/member")
public class MemberController {
    @Autowired
    private MemberService memberService;

    @Autowired
    private CouponFeignService couponFeignService;

    @RequestMapping("/coupons")
    public R test(){
        MemberEntity memberEntity = new MemberEntity();
        memberEntity.setNickname("張三");
        R membercoupons = couponFeignService.membercoupons();
        return R.ok().put("member", memberEntity).put("coupons", membercoupons.get("coupons"));
    }
}

由于可能出現版本不相容導緻運作失敗問題,所有依賴jar封包件如下

<!-- member會員服務pom.xml檔案,與coupon類似-->
<?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>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.5.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.kenai.gulimall</groupId>
	<artifactId>gulimall-member</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>gulimall-member</name>
	<description>谷粒商城會員服務</description>
	<properties>
		<java.version>1.8</java.version>
		<spring-cloud.version>Hoxton.SR8</spring-cloud.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>com.kenai.gulimall</groupId>
			<artifactId>gulimall-common</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</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>
		</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>
		</dependencies>
	</dependencyManagement>
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

公共微服務common的pom.xml檔案
<?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>gulimall</artifactId>
        <groupId>com.kenai.gulimall</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>gulimall-common</artifactId>
    <description>每一個微服務公共的依賴，bean，工具類等</description>

    <dependencies>
<!--        mybatisplus與springboot整合，這樣在application.yml中會有mybatis-plus提示，當然有其他作用-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.8</version>
        </dependency>
<!--        httpcomponents：java代碼發送http請求的工具類-->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.12</version>
        </dependency>
<!--        提供一些基礎的、通用的操作和處理，如自動生成toString()的結果、自動實作hashCode()和equals()方法、數組操作、枚舉、日期和時間的處理等-->
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>
<!--        mysql驅動-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.17</version>
        </dependency>
<!--        servelet-api在tomcat中自帶，是以設定scope為provided，表示編譯期有效，運作期不需要提供，不會打入包中-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.1.1.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

nacos作為注冊中心使用執行個體

繼續閱讀

關于Gradle配置的小結

Java小案例——随機數猜測随機數猜測

nginx location中斜線的位置的重要性

27 Best Free Eclipse Plug-ins for Java Developer to be ProductiveCode Quality PluginsText Editor PluginsDependency ManagementVersion Control Integration PluginsFramework Development Continuous Integration Related PluginsOther Utility Plugins

Java String.format方法的簡單使用

neo4j之cypher使用文檔

GitHub連夜封殺！這份阿裡 10W 字内部 Java 字面試手冊到底有多強？

spark/scala關于【資源檔案】加載方法概述外部檔案加載方案測試資源檔案打包入jar包中小結

mybatis_入門程式Mybatis入門

AOP程式設計_Android優雅權限架構(1)概念基礎，2021金三銀四前言正文大綱正文

Effective Java 8:通用程式設計

OOM三種類型

工廠模式-三種類型

【遞歸】高效率求2的n次幂

win10本地scala和spark安裝安裝scala安裝spark

scala (3) Function 和 Method