最近一直在做后台开发，但心里还是总惦记着Android，感觉还是Android有意思。正好项目中要用到极光推送，今天抽空来记录下这两天的研究成果。
我们知道IOS有自己的推送服务，但很遗憾Android没有原生的推送服务，现在有很多第三方的推送服务，比如个推、极光、亚马逊、百度云、聚能等。今天我们就来研究下极光推送的后台服务器如何实现。
关键点：
1.首先最好是把极光官网java后台服务器的demo下载下来，里面有我们需要的jar包，以及example.
2.极光推送的关键jpushClient = new JPushClient(masterSecret, appKey, 3);就是这个类。其中的参数需要我们从极光官网注册开发者，然后创建具体项目获取相应的两 个key值。其中appKey值就是我们手机端对应的key值
3.极光推送给我们提供了很多种推送的方式，我们可以选择某一个平台进行推送（Android ,IOS ,Windows Phone），也可以全部推送；我们可以针对某个特别的用户进行推送（设置alisa），也可以针对特别的群体进行推送（设置tag），第三个参数是设置推送保留的时间，只要在有效时间内上线就可以收到推送信息
4. 极光推送现在都用https连接，提交请求是post，获取数据为get
ok 接下来就看服务端的实现（JAVA）,JdPush推送方法+一个Servlet
:
package com.weiwend.jdpush;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import cn.jpush.api.JPushClient;import cn.jpush.api.common.resp.APIConnectionException;import cn.jpush.api.common.resp.APIRequestException;import cn.jpush.api.push.PushResult;import cn.jpush.api.push.model.Message;import cn.jpush.api.push.model.Options;import cn.jpush.api.push.model.Platform;import cn.jpush.api.push.model.PushPayload;import cn.jpush.api.push.model.audience.Audience;import cn.jpush.api.push.model.audience.AudienceTarget;import cn.jpush.api.push.model.notification.AndroidNotification;import cn.jpush.api.push.model.notification.IosNotification;import cn.jpush.api.push.model.notification.Notification;public class Jdpush { protected static final Logger LOG = LoggerFactory.getLogger(Jdpush.class); // demo App defined in resources/jpush-api.conf public static final String TITLE = "申通快递";public static final String ALERT = "祝大家新春快乐";public static final String MSG_CONTENT = "申通快递祝新老客户新春快乐";public static final String REGISTRATION_ID = "0900e8d85ef";public static final String TAG = "tag_api";public static JPushClient jpushClient=null;public static void testSendPush(String appKey ,String masterSecret) {jpushClient = new JPushClient(masterSecret, appKey, 3);// HttpProxy proxy = new HttpProxy("localhost", 3128);// Can use this https proxy: https://github.com/Exa-Networks/exaproxy// For push, all you need do is to build PushPayload object.//PushPayload payload = buildPushObject_all_all_alert(); //生成推送的内容，这里我们先测试全部推送PushPayload payload=buildPushObject_all_alias_alert();try {System.out.println(payload.toString());PushResult result = jpushClient.sendPush(payload);System.out.println(result+"…………………………..");LOG.info("Got result – " + result);} catch (APIConnectionException e) {LOG.error("Connection error. Should retry later. ", e);} catch (APIRequestException e) {LOG.error("Error response from JPush server. Should review and fix it. ", e);LOG.info("HTTP Status: " + e.getStatus());LOG.info("Error Code: " + e.getErrorCode());LOG.info("Error Message: " + e.getErrorMessage());LOG.info("Msg ID: " + e.getMsgId());}}public static PushPayload buildPushObject_all_all_alert() {return PushPayload.alertAll(ALERT);}public static PushPayload buildPushObject_all_alias_alert() {return PushPayload.newBuilder().setPlatform(Platform.all())//设置接受的平台.setAudience(Audience.all())//Audience设置为all，说明采用广播方式推送，所有用户都可以接收到.setNotification(Notification.alert(ALERT)).build();}public static PushPayload buildPushObject_android_tag_alertWithTitle() {return PushPayload.newBuilder().setPlatform(Platform.android()).setAudience(Audience.all()).setNotification(Notification.android(ALERT, TITLE, null)).build();}public static PushPayload buildPushObject_android_and_ios() {return PushPayload.newBuilder().setPlatform(Platform.android_ios()).setAudience(Audience.tag("tag1")).setNotification(Notification.newBuilder().setAlert("alert content").addPlatformNotification(AndroidNotification.newBuilder().setTitle("Android Title").build()).addPlatformNotification(IosNotification.newBuilder().incrBadge(1).addExtra("extra_key", "extra_value").build()).build()).build();}public static PushPayload buildPushObject_ios_tagAnd_alertWithExtrasAndMessage() {return PushPayload.newBuilder().setPlatform(Platform.ios()).setAudience(Audience.tag_and("tag1", "tag_all")).setNotification(Notification.newBuilder().addPlatformNotification(IosNotification.newBuilder().setAlert(ALERT).setBadge(5).setSound("happy").addExtra("from", "JPush").build()).build()).setMessage(Message.content(MSG_CONTENT)).setOptions(Options.newBuilder().setApnsProduction(true).build()).build();}public static PushPayload buildPushObject_ios_audienceMore_messageWithExtras() {return PushPayload.newBuilder().setPlatform(Platform.android_ios()).setAudience(Audience.newBuilder().addAudienceTarget(AudienceTarget.tag("tag1", "tag2")).addAudienceTarget(AudienceTarget.alias("alias1", "alias2")).build()).setMessage(Message.newBuilder().setMsgContent(MSG_CONTENT).addExtra("from", "JPush").build()).build();}}
可以看到上面我们推送平台设置的是所有平台，Audience设置为all（所有用户），这里key值和masterSecret值放在servlet中了。
没有行囊，没有目的，我孤独的走在路上，
