使用 google gson 转换Timestamp或Date类型为JSON字符串.

http://blog.csdn.net/z69183787/article/details/13016289

创建类型适配类:

    import java.lang.reflect.Type;
    import java.sql.Timestamp;
    import java.text.DateFormat;
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.Date;  

    import com.google.gson.JsonDeserializationContext;
    import com.google.gson.JsonDeserializer;
    import com.google.gson.JsonElement;
    import com.google.gson.JsonParseException;
    import com.google.gson.JsonPrimitive;
    import com.google.gson.JsonSerializationContext;
    import com.google.gson.JsonSerializer;  

    public class TimestampTypeAdapter implements JsonSerializer<Timestamp>, JsonDeserializer<Timestamp>{
        private final DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        public JsonElement serialize(Timestamp src, Type arg1, JsonSerializationContext arg2) {
            String dateFormatAsString = format.format(new Date(src.getTime()));
            return new JsonPrimitive(dateFormatAsString);
        }  

        public Timestamp deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
            if (!(json instanceof JsonPrimitive)) {
                throw new JsonParseException("The date should be a string value");
            }  

            try {
                Date date = format.parse(json.getAsString());
                return new Timestamp(date.getTime());
            } catch (ParseException e) {
                throw new JsonParseException(e);
            }
        }  

    }

类型适配类

应用类型适配器 写道

Gson gson = new GsonBuilder().registerTypeAdapter(Timestamp.class,new TimestampTypeAdapter()).setDateFormat("yyyy-MM-dd HH:mm:ss").create();
String jsonString = gson.toJson(resourceInfo,ResourceGeoInfo.class);

Date 类型的时间转换第二种方式;

 Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create();
String jsonString = gson.toJson(new Date(System.currentTimeMillis()),Date.class);
System.out.println(jsonString);