Broaden ConditionalOnClass checks for Web MVC

Expand the @ConditionalOnClass list in ConditionalOnWebMvcAvailable to include ApplicationContext, WebApplicationInitializer and EnableWebMvcExtension alongside Servlet and DispatcherServlet. This makes the conditional check more robust by requiring presence of core Servlet API, Spring Context, Spring Web initializer, Spring Web MVC and the Microsphere Web MVC extension APIs. Also adds corresponding imports and switches the annotation to a multi-line value with explanatory comments.

Author: mercyblitz

microsphere-spring-boot-webmvc/src/main/java/io/microsphere/spring/boot/webmvc/autoconfigure/condition/ConditionalOnWebMvcAvailable.java

@@ -17,10 +17,13 @@
 
 package io.microsphere.spring.boot.webmvc.autoconfigure.condition;
 
+import io.microsphere.spring.webmvc.annotation.EnableWebMvcExtension;
 import jakarta.servlet.Servlet;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.context.ApplicationContext;
+import org.springframework.web.WebApplicationInitializer;
 import org.springframework.web.servlet.DispatcherServlet;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 
@@ -46,7 +49,13 @@
 @Retention(RUNTIME)
 @Documented
 @ConditionalOnWebApplication(type = SERVLET)
-@ConditionalOnClass({Servlet.class, DispatcherServlet.class, EnableWebMvc.class})
+@ConditionalOnClass(value = {
+        Servlet.class,                   // Servlet API
+        ApplicationContext.class,        // Spring Context API
+        WebApplicationInitializer.class, // Spring Web API
+        DispatcherServlet.class,         // Spring Web MVC API
+        EnableWebMvcExtension.class      // Microsphere Spring Web MVC API
+})
 @ConditionalOnProperty(name = MICROSPHERE_SPRING_BOOT_WEBMVC_ENALBED_PROPERTY_NAME, matchIfMissing = true)
 public @interface ConditionalOnWebMvcAvailable {
 }