Handle JSON serialized Dates from JavaScript in LocalDateTimeDeserializer

src/main/java/com/fasterxml/jackson/datatype/jsr310/deser/LocalDateTimeDeserializer.java

@@ -18,7 +18,9 @@
 
 import java.io.IOException;
 import java.time.DateTimeException;
+import java.time.Instant;
 import java.time.LocalDateTime;
+import java.time.ZoneOffset;
 import java.time.format.DateTimeFormatter;
 
 import com.fasterxml.jackson.core.JsonParser;
@@ -40,10 +42,12 @@ public class LocalDateTimeDeserializer
 {
     private static final long serialVersionUID = 1L;
 
+    private static final DateTimeFormatter DEFAULT_FORMATTER = DateTimeFormatter.ISO_LOCAL_DATE_TIME;
+
     public static final LocalDateTimeDeserializer INSTANCE = new LocalDateTimeDeserializer();
 
     private LocalDateTimeDeserializer() {
-        this(DateTimeFormatter.ISO_LOCAL_DATE_TIME);
+        this(DEFAULT_FORMATTER);
     }
 
     public LocalDateTimeDeserializer(DateTimeFormatter formatter) {
@@ -63,7 +67,19 @@ public LocalDateTime deserialize(JsonParser parser, DeserializationContext conte
             if (string.length() == 0) {
                 return null;
             }
+
             try {
+	            if (_formatter == DEFAULT_FORMATTER) {
+	                // JavaScript by default includes time and zone in JSON serialized Dates (UTC/ISO instant format).
+	                if (string.length() > 10 && string.charAt(10) == 'T') {
+	                   if (string.endsWith("Z")) {
+	                       return LocalDateTime.ofInstant(Instant.parse(string), ZoneOffset.UTC);
+	                   } else {
+	                       return LocalDateTime.parse(string, DEFAULT_FORMATTER);
+	                   }
+	                }
+	            }
+
                 return LocalDateTime.parse(string, _formatter);
             } catch (DateTimeException e) {
                 _rethrowDateTimeException(parser, e);

src/test/java/com/fasterxml/jackson/datatype/jsr310/TestLocalDateTimeSerialization.java

@@ -24,8 +24,10 @@
 import org.junit.Before;
 import org.junit.Test;
 
+import java.time.Instant;
 import java.time.LocalDateTime;
 import java.time.Month;
+import java.time.ZoneOffset;
 import java.time.temporal.Temporal;
 import java.util.Calendar;
 import java.util.Date;
@@ -314,13 +316,23 @@ public void testDeserializationAsString03() throws Exception
         assertEquals("The value is not correct.", time, value);
     }
 
+    @Test
+    public void testDeserializationAsString04() throws Exception
+    {
+        Instant instant = Instant.now();
+        LocalDateTime value = mapper.readValue('"' + instant.toString() + '"', LocalDateTime.class);
+
+        assertNotNull("The value should not be null.", value);
+        assertEquals("The value is not correct.", LocalDateTime.ofInstant(instant, ZoneOffset.UTC), value);
+    }
+
     @Test
     public void testDeserializationWithTypeInfo01() throws Exception
     {
         LocalDateTime time = LocalDateTime.of(2005, Month.NOVEMBER, 5, 22, 31, 5, 829837);
 
         final ObjectMapper m = newMapper().addMixIn(Temporal.class, MockObjectConfiguration.class);
-        
+
         m.configure(DeserializationFeature.READ_DATE_TIMESTAMPS_AS_NANOSECONDS, true);
         Temporal value = m.readValue(
                 "[\"" + LocalDateTime.class.getName() + "\",[2005,11,5,22,31,5,829837]]", Temporal.class