fix:添加feign,未成功调用,还得参考之前的项目

nacos-server-common/pom.xml

@@ -13,11 +13,35 @@
     <description>nacos-server-common</description>
     <version>1.0.0</version>
 
+
+    <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>2.3.0.RELEASE</spring-boot.version>
+        <spring-cloud-alibaba.version>2.2.1.RELEASE</spring-cloud-alibaba.version>
+    </properties>
+
+
     <dependencies>
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-openfeign</artifactId>
+            <version>2.0.0.RELEASE</version>
+        </dependency>
+<!--        <dependency>-->
+<!--            <groupId>org.springframework.cloud</groupId>-->
+<!--            <artifactId>spring-cloud-starter-hystrix</artifactId>-->
+<!--            <version>1.4.7.RELEASE</version>-->
+<!--        </dependency>-->
     </dependencies>
 
 </project>
\ No newline at end of file

nacos-server-common/src/main/java/com/kwan/springcloudalibaba/api/ComputeClient.java

+package com.kwan.springcloudalibaba.api;
+
+import com.kwan.springcloudalibaba.common.Result;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+/**
+ * 使用feign配置goods-service服务
+ *
+ * @author : qinyingjie
+ * @version : 2.2.0
+ * @date : 2023/1/10 13:45
+ */
+@FeignClient(value = "nacos-server-producer/user", fallback = ComputeClientHystrix.class)
+public interface ComputeClient {
+
+    @RequestMapping(method = RequestMethod.GET, value = "{id}", produces = MediaType.APPLICATION_PROBLEM_JSON_VALUE)
+    Result getUserById(@PathVariable Integer id);
+
+}

nacos-server-common/src/main/java/com/kwan/springcloudalibaba/api/ComputeClientHystrix.java

+package com.kwan.springcloudalibaba.api;
+
+import com.kwan.springcloudalibaba.common.Result;
+import org.springframework.stereotype.Component;
+
+/**
+ * feign的降级
+ *
+ * @author : qinyingjie
+ * @version : 2.2.0
+ * @date : 2023/1/14 16:47
+ */
+@Component
+public class ComputeClientHystrix implements ComputeClient {
+    @Override
+    public Result getUserById(Integer id) {
+        return Result.error("feign方式请求  服务不可用 请求失败");
+    }
+}

nacos-server-consumer/pom.xml

@@ -20,6 +20,7 @@
         <spring-boot.version>2.3.0.RELEASE</spring-boot.version>
         <spring-cloud-alibaba.version>2.2.1.RELEASE</spring-cloud-alibaba.version>
     </properties>
+
     <dependencies>
         <dependency>
             <groupId>com.kwan.springcloudalibaba</groupId>

nacos-server-consumer/src/main/java/com/kwan/springcloudalibaba/NacosConsumerApplication.java

@@ -4,17 +4,11 @@ import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 
-/**
- * http://localhost:8085/nacos/consumer/nameInfo
- * <p>
- * <p>
- * 消费者
- *
- * @author : qinyingjie
- * @version : 2.2.0
- * @date : 2023/1/17 12:37
- */
+
+//@EnableFeignClients
+//@EnableCircuitBreaker
 @SpringBootApplication
+//@SpringBootApplication(exclude={DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
 public class NacosConsumerApplication {
 
     public static void main(String[] args) {

nacos-server-consumer/src/main/java/com/kwan/springcloudalibaba/controller/NacosConsumerController.java → nacos-server-consumer/src/main/java/com/kwan/springcloudalibaba/controller/ConsumerUserController.java

 package com.kwan.springcloudalibaba.controller;
 
+import com.kwan.springcloudalibaba.api.ComputeClient;
 import com.kwan.springcloudalibaba.common.Result;
-import org.springframework.beans.factory.annotation.Value;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.cloud.context.config.annotation.RefreshScope;
 import org.springframework.http.MediaType;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -12,18 +14,29 @@ import org.springframework.web.bind.annotation.RestController;
 @RefreshScope
 @RestController
 @RequestMapping("/nacos/consumer")
-public class NacosConsumerController {
+public class ConsumerUserController {
 
-    @Value("${user.name}")
-    private String nameInfo;
+    @Autowired
+    private ComputeClient computeClient;
 
 
+    /**
+     * http://127.0.0.1:8085/nacos/consumer/getUserById/1
+     *
+     * @param id
+     * @return
+     */
+    @GetMapping(value = "/getUserById/{id}", produces = MediaType.APPLICATION_PROBLEM_JSON_VALUE)
+    public Result getUserById(@PathVariable Integer id) {
+        return Result.ok(computeClient.getUserById(id));
+    }
+
     /**
      * 获取配置的变量
      */
     @GetMapping(value = "/nameInfo", produces = MediaType.APPLICATION_PROBLEM_JSON_VALUE)
     public Result nameInfo() {
-        return Result.ok(nameInfo);
+        return Result.ok();
     }
 
 }

nacos-server-producer/pom.xml

@@ -2,6 +2,18 @@
 <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>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
     <parent>
         <groupId>com.kwan.springcloudalibaba</groupId>
         <artifactId>nacos-server-parent</artifactId>

nacos-server-producer/src/main/java/com/kwan/springcloudalibaba/controller/UserController.java

 package com.kwan.springcloudalibaba.controller;
 
 
+import com.kwan.springcloudalibaba.common.Result;
 import com.kwan.springcloudalibaba.entity.User;
 import com.kwan.springcloudalibaba.service.IUserService;
 import lombok.extern.slf4j.Slf4j;
@@ -24,19 +25,23 @@ public class UserController {
     @Autowired
     private IUserService userService;
 
+    /**
+     * http://127.0.0.1:9091/user/getUserById/1
+     *
+     * @param id
+     * @return
+     */
+    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
+    public Result getUserById(@PathVariable Integer id) {
+        return Result.ok(userService.getUserById(id));
+    }
+
     @RequestMapping(value = "/all", method = RequestMethod.GET)
     public List<User> addAdvertise() {
         log.info("测试日志={}", "success");
         return userService.getUsers();
     }
 
-
-    @RequestMapping(value = "/getUserById/{id}", method = RequestMethod.GET)
-    public User getUserById(@PathVariable Integer id) {
-        return userService.getUserById(id);
-    }
-
-
     @RequestMapping(value = "/getUserByName", method = RequestMethod.GET)
     public User getUserByName(@RequestParam String sex) {
         return userService.getUserByName(sex);