Comments (3)
We plan to add a Default Date/Time serialization/deserialization in version
1.2. The
tricky thing about this feature is that we do not know the format that the
client
supports. If the system using the GSON library passes these JSON serialized
object
back and forth and serializing/deserializing on both ends then its a non-issue
for
which format is supported; however, if you used the serialized version for
display
purposes then the date format matters.
For the time being, you can register the following Type Adapter:
/**
* A default type adapter for a {@link Date} object.
*
* @author Joel Leitch
*/
public class DateTypeAdapter implements JsonSerializer<Date>,
JsonDeserializer<Date> {
private final DateFormat format = DateFormat.getInstance();
public JsonElement serialize(Date src, Type typeOfSrc, JsonSerializationContext
context) {
String dateFormatAsString = format.format(src);
return new JsonPrimitive(dateFormatAsString);
}
public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext
context)
throws JsonParseException {
if (!(json instanceof JsonPrimitive)) {
throw new JsonParseException("The date should be a string value");
}
try {
return format.parse(json.getAsString());
} catch (ParseException e) {
throw new JsonParseException(e);
}
}
}
// Create a GSON instance that can serialize/deserialize "java.util.Date"
objects
Gson gson = new GsonBuilder()
.registerTypeAdapter(new DateTypeAdapter())
.create();
Original comment by [email protected]
on 5 Aug 2008 at 6:41
- Changed state: Accepted
- Added labels: Type-Enhancement
- Removed labels: Type-Defect
from google-gson.
Submitted the type adapter to support this feature (r130). Still need to
update the
GsonBuilder class to make the Date TypeAdapter configurable without requiring
the
adapter to be registered.
Original comment by [email protected]
on 5 Aug 2008 at 7:30
from google-gson.
The change r145 contains the last piece of code required to close off this bug.
Removed the DateTypeAdapter from the public API so that it can only be
configured via
the GsonBuilder.
Original comment by [email protected]
on 13 Aug 2008 at 8:28
- Changed state: Fixed
from google-gson.
Related Issues (20)
- StackOverFlow while converting a null object to json
- Correct JsonWriter class-level Javadoc
- Error desirialization of ConcurrentNavigableMap
- FutureTypeAdapter.read() throws unhelpful exception HOT 2
- Patch for /trunk/gson/src/main/java/com/google/gson/JsonDeserializer.java
- LazilyParsedNumber does not implement eqals and hashCode methods HOT 2
- private inheritance
- convert string to JSON with special character \u
- JsonElement's getAsInt() doesn't throw an Error when converting an too big exponential value HOT 1
- phone
- UI ISSUE IN DROPDOWN LIST
- Disable @SerializedName usage via GsonBuilder
- Gson not populating fields on Object created with InstanceCreator
- Support Java 8 time: Instant, LocalDate, LocalTime, ZonedDateTime ...
- lenient flag ignored in JsonWriter#value(double)
- Track source location for JsonElement
- Can we have feature to access child directly using SerializedName?
- Serialization of NaN/Inf with complex map key serialization and special floating point values enabled is broken HOT 1
- Throw more detailed error message
- Failed to invoke public org.joda.time.Chronology() with no args
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