update workflow to use jdk 11

Author: wing328

.github/workflows/samples-spring.yaml

@@ -67,7 +67,7 @@ jobs:
       - uses: actions/setup-java@v5
         with:
           distribution: 'temurin'
-          java-version: 8
+          java-version: 11
       - name: Cache maven dependencies
         uses: actions/cache@v5
         env:

samples/openapi3/server/petstore/spring-boot-oneof-interface/src/main/java/org/openapitools/api/BarApiController.java

@@ -19,15 +19,15 @@
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.context.request.NativeWebRequest;
 
-import javax.validation.constraints.*;
-import javax.validation.Valid;
+import jakarta.validation.constraints.*;
+import jakarta.validation.Valid;
 
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
-import javax.annotation.Generated;
+import jakarta.annotation.Generated;
 
-@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.13.0-SNAPSHOT")
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.21.0-SNAPSHOT")
 @Controller
 @RequestMapping("${openapi.byRefOrValue.base-path:}")
 public class BarApiController implements BarApi {

samples/openapi3/server/petstore/spring-boot-oneof-interface/src/main/java/org/openapitools/api/FooApiController.java

@@ -2,6 +2,7 @@
 
 import org.openapitools.model.Foo;
 import org.openapitools.model.FooRefOrValue;
+import org.springframework.lang.Nullable;
 
 
 import org.springframework.beans.factory.annotation.Autowired;
@@ -19,15 +20,15 @@
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.context.request.NativeWebRequest;
 
-import javax.validation.constraints.*;
-import javax.validation.Valid;
+import jakarta.validation.constraints.*;
+import jakarta.validation.Valid;
 
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
-import javax.annotation.Generated;
+import jakarta.annotation.Generated;
 
-@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.13.0-SNAPSHOT")
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.21.0-SNAPSHOT")
 @Controller
 @RequestMapping("${openapi.byRefOrValue.base-path:}")
 public class FooApiController implements FooApi {