Java tutorial
/******************************************************************************* * Copyright (c) 2011 GitHub Inc. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Kevin Sawicki (GitHub Inc.) - initial API and implementation *******************************************************************************/ package com.shengzhish.xyj.core; 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; import java.lang.reflect.Type; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.TimeZone; /** * Formatter for date formats present in the GitHub v2 and v3 API. */ public class DateFormatter implements JsonDeserializer<Date>, JsonSerializer<Date> { private final DateFormat[] formats; /** */ String DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss'Z'"; //$NON-NLS-1$ /** */ String DATE_FORMAT_V2_1 = "yyyy/MM/dd HH:mm:ss Z"; //$NON-NLS-1$ /** */ String DATE_FORMAT_V2_2 = "yyyy-MM-dd'T'HH:mm:ss"; //$NON-NLS-1$ /** * Create date formatter */ public DateFormatter() { formats = new DateFormat[3]; formats[0] = new SimpleDateFormat(DATE_FORMAT); formats[1] = new SimpleDateFormat(DATE_FORMAT_V2_1); formats[2] = new SimpleDateFormat(DATE_FORMAT_V2_2); final TimeZone timeZone = TimeZone.getTimeZone("Zulu"); //$NON-NLS-1$ for (DateFormat format : formats) format.setTimeZone(timeZone); } public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { JsonParseException exception = null; final String value = json.getAsString(); for (DateFormat format : formats) try { synchronized (format) { return format.parse(value); } } catch (ParseException e) { exception = new JsonParseException(e); } throw exception; } public JsonElement serialize(Date date, Type type, JsonSerializationContext context) { final DateFormat primary = formats[0]; String formatted; synchronized (primary) { formatted = primary.format(date); } return new JsonPrimitive(formatted); } }