（没成功，放弃尝试）去除注册中心 nacos；添加 Eureka；升级Spring Cloud版本为2022.0.1；JDK版本为17

backend/microservice-eureka-server-8761/pom.xml

@@ -0,0 +1,43 @@
+<?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>spring-boot-starter-parent</artifactId>-->
+    <!--    <groupId>org.springframework.boot</groupId>-->
+    <!--    <version>3.0.2</version>-->
+    <!--</parent>-->
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.cxyxiaomo</groupId>
+    <artifactId>microservice-eureka-server-8761</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <name>microservice-eureka-server</name>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+    </properties>
+
+    <dependencyManagement>
+        <dependencies>
+            <!-- Spring Cloud Dependencies -->
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-dependencies</artifactId>
+                <version>2022.0.1</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
+        </dependency>
+    </dependencies>
+</project>

backend/microservice-eureka-server-8761/src/main/java/com/cxyxiaomo/epp/EurekaServerApp.java

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+package com.cxyxiaomo.epp;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
+
+@SpringBootApplication
+@EnableEurekaServer
+public class EurekaServerApp {
+    public static void main(String[] args) {
+        SpringApplication.run(EurekaServerApp.class, args);
+    }
+}

backend/microservice-eureka-server-8761/src/main/resources/application.yml

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+server:
+  port: 8761
+
+eureka:
+  instance:
+    hostname: localhost
+  client:
+    register-with-eureka: false   # 是否向注册中心注册自己
+    fetch-registry: false         # false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
+    # 以上两个配置只需要在单机版配置，集群版不需要配这两个
+    service-url:
+      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
+
+spring:
+  application:
+    name: microservice-eureka-server

backend/microservice-eureka-server-8761/src/test/java/com/epp/AppTest.java

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+package com.epp;
+
+/**
+ * Unit test for simple App.
+ */
+public class AppTest {
+    /**
+     * Rigorous Test :-)
+     */
+    public void shouldAnswerWithTrue() {
+    }
+}