“parsingdate：1302828677828”试图用Gson反序列化从服务器收到的一个毫秒格式的date

经过4个小时不停地试图解决问题，我决定问这里是否有人可以帮助我。

问题是，当我的Android客户端试图反序列化从服务器接收到的数据时，会抛出“Unparseable：1302828677828”exception。

我想知道是否有可能使用Gson反序列化一个毫秒格式的date。

Answer 1

阿方索的评论：

最后我得到了解决scheme：

 // Creates the json object which will manage the information received GsonBuilder builder = new GsonBuilder(); // Register an adapter to manage the date types as long values builder.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() { public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { return new Date(json.getAsJsonPrimitive().getAsLong()); } }); Gson gson = builder.create(); 

Answer 2

当我尝试使用Android注释库的Rest客户端反序列化DateTime字段时，我遇到了同样的问题。 作为一个解决scheme，我创build了自定义的GsonHttpMessageConverter

 public class CustomGsonHttpMessageConverter extends GsonHttpMessageConverter { public CustomGsonHttpMessageConverter() { // Creates the json object which will manage the information received GsonBuilder builder = new GsonBuilder(); // Register an adapter to manage the date types as long values builder.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() { public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { return new Date(json.getAsJsonPrimitive().getAsLong()); } }); setGson(builder.create()); } } 

并在rest客户端中定义它

 @Rest(rootUrl = "http://192.168.1.1:8080", converters = {CustomGsonHttpMessageConverter.class}) public interface RestClient extends RestClientErrorHandling { ... 

我希望这会有帮助

Answer 3

我写了一个基于GSON默认DateTypeAdapter的ImprovedDateTypeAdapter ，它支持默认date格式和时间戳（long）格式。

 import com.google.gson.Gson; import com.google.gson.JsonSyntaxException; import com.google.gson.TypeAdapter; import com.google.gson.TypeAdapterFactory; import com.google.gson.reflect.TypeToken; import com.google.gson.stream.JsonReader; import com.google.gson.stream.JsonToken; import com.google.gson.stream.JsonWriter; import java.io.IOException; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import java.util.TimeZone; public final class ImprovedDateTypeAdapter extends TypeAdapter<Date> { public static final TypeAdapterFactory FACTORY = new TypeAdapterFactory() { public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) { @SuppressWarnings("unchecked") TypeAdapter<T> typeAdapter = (TypeAdapter<T>) ((typeToken.getRawType() == Date.class) ? new ImprovedDateTypeAdapter() : null); return typeAdapter; } }; private final DateFormat enUsFormat; private final DateFormat localFormat; private final DateFormat iso8601Format; public ImprovedDateTypeAdapter() { this.enUsFormat = DateFormat.getDateTimeInstance(2, 2, Locale.US); this.localFormat = DateFormat.getDateTimeInstance(2, 2); this.iso8601Format = buildIso8601Format(); } private static DateFormat buildIso8601Format() { DateFormat iso8601Format = new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US); iso8601Format.setTimeZone(TimeZone.getTimeZone("UTC")); return iso8601Format; } public Date read(JsonReader in) throws IOException { if (in.peek() == JsonToken.NULL) { in.nextNull(); return null; } return deserializeToDate(in.nextString()); } private synchronized Date deserializeToDate(String json) { try { return new Date(Long.parseLong(json)); } catch (Exception e) { try { return this.localFormat.parse(json); } catch (ParseException e1) { try { return this.enUsFormat.parse(json); } catch (ParseException e2) { try { return this.iso8601Format.parse(json); } catch (ParseException e3) { throw new JsonSyntaxException(json, e3); } } } } } public synchronized void write(JsonWriter out, Date value) throws IOException { if (value == null) { out.nullValue(); return; } String dateFormatAsString = this.enUsFormat.format(value); out.value(dateFormatAsString); } } 

要使用它：

 // Creates the json object which will manage the information received GsonBuilder builder = new GsonBuilder(); // Register an adapter to manage the date types as long values builder.registerTypeAdapter(Date.class, new ImprovedDateTypeAdapter()); Gson gson = builder.create();