（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-provider-user-8001/pom.xml

@@ -13,8 +13,8 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven.compiler.source>11</maven.compiler.source>
-        <maven.compiler.target>11</maven.compiler.target>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
     </properties>
 
     <dependencies>
@@ -67,28 +67,16 @@
         </dependency>
 
         <!-- Spring Boot -->
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-test</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
 
-        <!-- Nacos -->
+        <!-- Eureka Discovery Client -->
         <dependency>
-            <groupId>com.alibaba.cloud</groupId>
-            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
         </dependency>
-
-        <!-- 热部署 -->
-        <!--<dependency>-->
-        <!--    <groupId>org.springframework.boot</groupId>-->
-        <!--    <artifactId>spring-boot-devtools</artifactId>-->
-        <!--    <version>2.7.5</version>-->
-        <!--</dependency>-->
-
     </dependencies>
 
 

backend/microservice-provider-user-8001/src/main/java/com/cxyxiaomo/epp/user/UserProvider.java

@@ -4,6 +4,7 @@ import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
 
+// import org.springframework.cloud.netflix.eureka.server.EnableEurekaClient;
 // 启动类
 
 @SpringBootApplication

backend/microservice-provider-user-8001/src/main/resources/application.yml

@@ -11,13 +11,13 @@ mybatis:
 spring:
   application:
     name: microservice-provider-user
-  cloud:
-    nacos:
-      discovery:
-        server-addr: 127.0.0.1:8848
   datasource:
     type: com.alibaba.druid.pool.DruidDataSource
     driver-class-name: com.mysql.cj.jdbc.Driver
     url: jdbc:mysql://127.0.0.1:3306/epp?useUnicode=true&characterEncoding=utf8&useSSL=false
     username: root
     password: root
+eureka:
+  client:
+    service-url:
+      defaultZone: http://localhost:8761/eureka/