服务消费者使用 @LoadBalanced RestTemplate 实现服务调用

nacos-discovery-consumer-sample/.mvn/wrapper/MavenWrapperDownloader.java

@@ -13,9 +13,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import java.net.*;
-import java.io.*;
-import java.nio.channels.*;
 import java.util.Properties;
 
 public class MavenWrapperDownloader {

nacos-discovery-consumer-sample/pom.xml

@@ -26,6 +26,13 @@
             <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
         </dependency>
 
+        <!-- Spring Cloud OpenFeign -->
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-openfeign</artifactId>
+            <version>2.2.2.RELEASE</version>
+        </dependency>
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

nacos-discovery-consumer-sample/src/main/java/com/example/demo/RestTemplateController.java

@@ -0,0 +1,35 @@
+package com.example.demo;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cloud.client.loadbalancer.LoadBalanced;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.client.RestTemplate;
+
+/**
+ * 服务调用
+ *
+ * @author yclimb
+ * @date 2020/9/30
+ */
+@RestController
+public class RestTemplateController {
+
+    @LoadBalanced
+    @Autowired
+    public RestTemplate restTemplate;
+
+    @LoadBalanced
+    @Bean
+    public RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
+
+    @GetMapping("/call/echo/{message}")
+    public String callEcho(@PathVariable String message) {
+        // 访问应用 nacos-discovery-provider-sample 的 REST "/echo/{message}"
+        return restTemplate.getForObject("http://nacos-discovery-provider-sample/echo/" + message, String.class);
+    }
+}