Prevent PostConstruct to be used in production code

Closes gh-36528

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/batch/JobLauncherApplicationRunner.java

@@ -24,7 +24,6 @@ import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Properties;
 
-import jakarta.annotation.PostConstruct;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
@@ -46,6 +45,7 @@ import org.springframework.batch.core.repository.JobExecutionAlreadyRunningExcep
 import org.springframework.batch.core.repository.JobInstanceAlreadyCompleteException;
 import org.springframework.batch.core.repository.JobRepository;
 import org.springframework.batch.core.repository.JobRestartException;
+import org.springframework.beans.factory.InitializingBean;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.ApplicationArguments;
 import org.springframework.boot.ApplicationRunner;
@@ -67,7 +67,8 @@ import org.springframework.util.StringUtils;
  * @author Stephane Nicoll
  * @since 2.3.0
  */
-public class JobLauncherApplicationRunner implements ApplicationRunner, Ordered, ApplicationEventPublisherAware {
+public class JobLauncherApplicationRunner
+		implements ApplicationRunner, InitializingBean, Ordered, ApplicationEventPublisherAware {
 
 	/**
 	 * The default order for the command line runner.
@@ -110,13 +111,18 @@ public class JobLauncherApplicationRunner implements ApplicationRunner, Ordered,
 		this.jobRepository = jobRepository;
 	}
 
-	@PostConstruct
+	@Override
-	public void validate() {
+	public void afterPropertiesSet() {
 		if (this.jobs.size() > 1 && !StringUtils.hasText(this.jobName)) {
 			throw new IllegalArgumentException("Job name must be specified in case of multiple jobs");
 		}
 	}
 
+	@Deprecated(since = "3.0.10", forRemoval = true)
+	public void validate() {
+		afterPropertiesSet();
+	}
+
 	public void setOrder(int order) {
 		this.order = order;
 	}

src/checkstyle/checkstyle.xml

@@ -23,7 +23,7 @@
 			<property name="id" value="mainCodeIllegalImportCheck"/>
 			<property name="regexp" value="true" />
 			<property name="illegalClasses"
-				value="^javax.annotation.PostConstruct"/>
+				value="javax.annotation.PostConstruct, jakarta.annotation.PostConstruct"/>
 		</module>
 		<module
 			name="com.puppycrawl.tools.checkstyle.checks.imports.ImportControlCheck">