Jakarta EE 9 migration

Upgrades many dependency declarations; removes old EJB 2.x support and outdated Servlet-based integrations (Commons FileUpload, FreeMarker JSP support, Tiles).

Closes gh-22093
Closes gh-25354
Closes gh-26185
Closes gh-27423
See gh-27424

spring-messaging/src/main/java/org/springframework/messaging/converter/JsonbMessageConverter.java

@@ -21,9 +21,9 @@ import java.io.Writer;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
 
-import javax.json.bind.Jsonb;
-import javax.json.bind.JsonbBuilder;
-import javax.json.bind.JsonbConfig;
+import jakarta.json.bind.Jsonb;
+import jakarta.json.bind.JsonbBuilder;
+import jakarta.json.bind.JsonbConfig;
 
 import org.springframework.util.Assert;
 
@@ -33,8 +33,8 @@ import org.springframework.util.Assert;
  *
  * @author Juergen Hoeller
  * @since 5.3
- * @see javax.json.bind.Jsonb
- * @see javax.json.bind.JsonbBuilder
+ * @see jakarta.json.bind.Jsonb
+ * @see jakarta.json.bind.JsonbBuilder
  * @see #setJsonb
  */
 public class JsonbMessageConverter extends AbstractJsonMessageConverter {

spring-messaging/src/main/java/org/springframework/messaging/handler/annotation/reactive/PayloadMethodArgumentResolver.java

@@ -63,7 +63,7 @@ import org.springframework.validation.annotation.Validated;
  * {@link DataBuffer DataBuffer}.
  *
  * <p>Validation is applied if the method argument is annotated with
- * {@code @javax.validation.Valid} or
+ * {@code @jakarta.validation.Valid} or
  * {@link org.springframework.validation.annotation.Validated}. Validation
  * failure results in an {@link MethodArgumentNotValidException}.
  *
@@ -143,7 +143,7 @@ public class PayloadMethodArgumentResolver implements HandlerMethodArgumentResol
 	 * {@link Decoder}.
 	 *
 	 * <p>Validation is applied if the method argument is annotated with
-	 * {@code @javax.validation.Valid} or
+	 * {@code @jakarta.validation.Valid} or
 	 * {@link org.springframework.validation.annotation.Validated}. Validation
 	 * failure results in an {@link MethodArgumentNotValidException}.
 	 *

spring-messaging/src/main/java/org/springframework/messaging/handler/annotation/support/PayloadMethodArgumentResolver.java

@@ -190,7 +190,7 @@ public class PayloadMethodArgumentResolver implements HandlerMethodArgumentResol
 
 	/**
 	 * Validate the payload if applicable.
-	 * <p>The default implementation checks for {@code @javax.validation.Valid},
+	 * <p>The default implementation checks for {@code @jakarta.validation.Valid},
 	 * Spring's {@link Validated},
 	 * and custom annotations whose name starts with "Valid".
 	 * @param message the currently processed message

spring-messaging/src/main/java/org/springframework/messaging/simp/config/AbstractMessageBrokerConfiguration.java

@@ -112,7 +112,7 @@ public abstract class AbstractMessageBrokerConfiguration implements ApplicationC
 		jackson2Present = ClassUtils.isPresent("com.fasterxml.jackson.databind.ObjectMapper", classLoader) &&
 				ClassUtils.isPresent("com.fasterxml.jackson.core.JsonGenerator", classLoader);
 		gsonPresent = ClassUtils.isPresent("com.google.gson.Gson", classLoader);
-		jsonbPresent = ClassUtils.isPresent("javax.json.bind.Jsonb", classLoader);
+		jsonbPresent = ClassUtils.isPresent("jakarta.json.bind.Jsonb", classLoader);
 		kotlinSerializationJsonPresent = ClassUtils.isPresent("kotlinx.serialization.json.Json", classLoader);
 	}
 
@@ -553,7 +553,7 @@ public abstract class AbstractMessageBrokerConfiguration implements ApplicationC
 			if (this.applicationContext != null && this.applicationContext.containsBean(MVC_VALIDATOR_NAME)) {
 				validator = this.applicationContext.getBean(MVC_VALIDATOR_NAME, Validator.class);
 			}
-			else if (ClassUtils.isPresent("javax.validation.Validator", getClass().getClassLoader())) {
+			else if (ClassUtils.isPresent("jakarta.validation.Validator", getClass().getClassLoader())) {
 				Class<?> clazz;
 				try {
 					String className = "org.springframework.validation.beanvalidation.OptionalValidatorFactoryBean";