update spring boot version to latest

Author: flystar32

mse-simple-demo/SpringCloudGateway/pom.xml

@@ -47,6 +47,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
+            <version>4.5.13</version>
         </dependency>
     </dependencies>
 
@@ -91,6 +92,14 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
         </plugins>
         <finalName>${project.artifactId}</finalName>
     </build>

mse-simple-demo/SpringCloudGateway/src/main/java/com/alibabcloud/mse/demo/DemoController.java

@@ -1,6 +1,7 @@
 package com.alibabcloud.mse.demo;
 
 
+import jakarta.annotation.PostConstruct;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClientBuilder;
@@ -12,7 +13,6 @@
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.client.RestTemplate;
 
-import javax.annotation.PostConstruct;
 import java.util.Random;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;