Fetch by multiple entities by id (JPQL and Specification)

Author: AnghelLeonard

HibernateSpringBootLoadMultipleIdsSpecification/src/main/java/com/bookstore/MainApplication.java

@@ -23,6 +23,9 @@ public static void main(String[] args) {
     public ApplicationRunner init() {
         return args -> {
 
+            System.out.println("\nFetching multiple ids (findAllById()):");
+            bookstoreService.fetchByMultipleIdsFindAllById();
+            
             System.out.println("\nFetching multiple ids (JPQL):");
             bookstoreService.fetchByMultipleIdsJpql();
 

HibernateSpringBootLoadMultipleIdsSpecification/src/main/java/com/bookstore/service/BookstoreService.java

@@ -15,16 +15,22 @@ public BookstoreService(BookRepository bookRepository) {
         this.bookRepository = bookRepository;
     }
 
+    public void fetchByMultipleIdsFindAllById() {
+
+        List<Book> books = bookRepository.findAllById(List.of(1L, 2L, 5L));
+        System.out.println(books);
+    }
+
     public void fetchByMultipleIdsJpql() {
-        
+
         List<Book> books = bookRepository.fetchByMultipleIds(List.of(1L, 2L, 5L));
         System.out.println(books);
     }
-    
+
     public void fetchByMultipleIdsSpec() {
-        
+
         List<Book> books = bookRepository.findAll(
-                new InIdsSpecification(List.of(1L, 2L, 5L)));        
+                new InIdsSpecification(List.of(1L, 2L, 5L)));
         System.out.println(books);
     }
 }