JAXB - adapter daty

OgloszeniaSerwer/src/main/java/ogloszenia/model/AdapterDaty.java

+package ogloszenia.model;
+
+import jakarta.xml.bind.annotation.adapters.XmlAdapter;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+public class AdapterDaty extends XmlAdapter<String, LocalDateTime> {
+    private static final DateTimeFormatter FORMAT = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+
+    @Override
+    public LocalDateTime unmarshal(String s) {
+        return LocalDateTime.parse(s, FORMAT);
+        //return LocalDateTime.parse(s); // domyslny format
+    }
+
+    @Override
+    public String marshal(LocalDateTime d) {
+        return FORMAT.format(d);
+        //return d.toString(); // domyslny format
+    }
+}

OgloszeniaSerwer/src/main/java/ogloszenia/model/Ogloszenie.java

@@ -3,6 +3,7 @@ package ogloszenia.model;
 import jakarta.xml.bind.annotation.XmlAttribute;
 import jakarta.xml.bind.annotation.XmlElement;
 import jakarta.xml.bind.annotation.XmlTransient;
+import jakarta.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
 
 import java.math.BigDecimal;
 import java.time.LocalDateTime;
@@ -14,6 +15,7 @@ public class Ogloszenie {
     @XmlTransient
     private Integer idSprzedawcy;
     @XmlElement(name="wystawione")
+    @XmlJavaTypeAdapter(AdapterDaty.class)
     private LocalDateTime dataWystawienia;
     private BigDecimal cena;
     private String tytul;