JAVA-3541: Move spring-5-mvc into spring-web-modules

spring-web-modules/spring-5-mvc/src/main/java/com/baeldung/idc/BookOperations.java

@@ -0,0 +1,23 @@
+package com.baeldung.idc;
+
+import java.util.List;
+import java.util.Optional;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@RequestMapping("/default")
+public interface BookOperations {
+
+    @GetMapping("/")
+    List<Book> getAll();
+
+    @GetMapping("/{id}")
+    Optional<Book> getById(@PathVariable int id);
+
+    @PostMapping("/save/{id}")
+    public void save(@RequestBody Book book, @PathVariable int id);
+}