[BAEL-2538] Added tutorial queries and tests

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/util/LocalDateConverter.java

@@ -0,0 +1,25 @@
+package com.baeldung.util;
+
+import javax.persistence.AttributeConverter;
+import javax.persistence.Converter;
+import java.sql.Date;
+import java.time.LocalDate;
+import java.util.Optional;
+
+@Converter(autoApply = true)
+public class LocalDateConverter implements AttributeConverter<LocalDate, Date> {
+
+    @Override
+    public Date convertToDatabaseColumn(LocalDate localDate) {
+        return Optional.ofNullable(localDate)
+                .map(Date::valueOf)
+                .orElse(null);
+    }
+
+    @Override
+    public LocalDate convertToEntityAttribute(Date date) {
+        return Optional.ofNullable(date)
+                .map(Date::toLocalDate)
+                .orElse(null);
+    }
+}