利用微信公众平台实现自动回复消息—java版

最近公司需要拿微信公众平台做个东西，所以就开始了最基本学习，网上很多是php版的，对于我这个只会java，不会php的就只能在网上找点只言片语来一点一点学习了。不费话了直接贴图看效果（很简单的）。

不会做关注时就回复信息，所以必须先发送“？”，才能出现提示。回复“1”和“其他”都是返回文字信息，“2”是音乐信息，“3”是图文信息。

好了，下面进入正题。

1、首先必须开通微信公中平台，还得申请到高级功能的（这个点比较坑，我等了两天才申请到的），关于申请公众平台我就不说了，网上很多介绍，自己看吧。

2、必须有自己的服务器资源，因为公众平台开发者模式开启时，必须填写接口配置信息（成为开发者）。

服务器资源我是用的是百度开发者中心来创建自己的应用。百度开发者中心：http://developer.baidu.com/

成为微信公众平台开发者前必须发布好自己的服务器资源，因为微信服务器将发送GET请求到填写的URL上（后面详细介绍）。

3、创建自己的应用。

这是整个项目结构。

下面逐一介绍：

  1 public class WbChat extends HttpServlet{
  2  
  3     private static final long serialVersionUID = 1L;
  4 
  5     public WbChat() {
  6         super();
  7     }
  8     @Override
  9     protected void doGet(HttpServletRequest request, HttpServletResponse response)
 10             throws ServletException, IOException {
 11         //这里没有对发送信息者进行验证，直接返回了，要加验证的话自己去百度吧
 12         response.setContentType("text/html;charset=UTF-8");
 13         PrintWriter pw = response.getWriter();
 14         String echo = request.getParameter("echostr");
 15         echo = new String(echo.getBytes("ISO-8859-1"),"UTF-8");
 16         pw.println(echo);
 17         //当你提交成为开发者的URL和Token时，微信服务器将发送GET请求到填写的URL上，
 18         //只有你返回参数echostr时，他才会认为你这个接口是通的，才会提交成功
 19     }
 20 
 21     @Override
 22     protected void doPost(HttpServletRequest request, HttpServletResponse response)
 23             throws ServletException, IOException {
 24 //        当你用微信给平台发送信息时就会到这里
 25 //        回复音乐和图文消息，我都写死了，自己可以根据自己的需要加相应的处理
 26         response.setContentType("text/html;charset=UTF-8");
 27         PrintWriter pw = response.getWriter();
 28         String wxMsgXml = IOUtils.toString(request.getInputStream(),"utf-8");
 29         RequestTextMessage textMsg = null;
 30         try {
 31                 textMsg = getRequestTextMessage(wxMsgXml);
 32         } catch (Exception e) {
 33                 e.printStackTrace();
 34         }
 35         StringBuffer replyMsg = new StringBuffer();
 36         String receive = textMsg.getContent().trim();
 37         String returnXml = null;
 38         
 39         if (textMsg != null&&!receive.equals("")) {
 40             if (receive.equals("？")||receive.equals("?")) {
 41                 
 42                 replyMsg.append("欢迎使用微信平台！");
 43                 replyMsg.append("\r\n1、当前时间");
 44                 replyMsg.append("\r\n2、听音乐");
 45                 replyMsg.append("\r\n3、看图文");
 46                 replyMsg.append("\r\n其他、回音壁请直接输入文字信息");
 47                 
 48                 returnXml = getReplyTextMessage(replyMsg.toString(), textMsg.getFromUserName(),textMsg.getToUserName());
 49                
 50             } else  if (receive.equals("2")) {
 51             
 52             //回复音乐信息
 53             returnXml = getReplyMusicMessage(textMsg.getFromUserName(),textMsg.getToUserName());
 54             
 55             
 56         } else  if (receive.equals("3")) {
 57             
 58             //回复图文 
 59             returnXml = getReplyTuwenMessage(textMsg.getFromUserName(),textMsg.getToUserName());
 60            
 61         }  else if (receive.equals("1")) {
 62             
 63             //回复时间
 64             SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
 65 
 66             replyMsg.append("当前时间\r\n"+df.format(new Date()));
 67             returnXml = getReplyTextMessage(replyMsg.toString(), textMsg.getFromUserName(),textMsg.getToUserName());
 68          
 69         } else {
 70 
 71             replyMsg.append("收到： " + textMsg.getContent());
 72             returnXml = getReplyTextMessage(replyMsg.toString(), textMsg.getFromUserName(),textMsg.getToUserName());
 73      
 74         }
 75         } else {
 76 
 77             replyMsg.append("别闹了，这谁看得懂啊！");
 78             returnXml = getReplyTextMessage(replyMsg.toString(), textMsg.getFromUserName(),textMsg.getToUserName());
 79             
 80         }
 81         pw.println(returnXml);
 82     }
 83 
 84     
 85 //         获取推送文本消息
 86     private RequestTextMessage getRequestTextMessage(String xml){
 87             
 88             XStream xstream = new XStream(new DomDriver());
 89             
 90             xstream.alias("xml", RequestTextMessage.class);
 91             xstream.aliasField("ToUserName", RequestTextMessage.class, "toUserName");
 92             xstream.aliasField("FromUserName", RequestTextMessage.class, "fromUserName");
 93             xstream.aliasField("CreateTime", RequestTextMessage.class, "createTime");
 94             xstream.aliasField("MsgType", RequestTextMessage.class, "messageType");
 95             xstream.aliasField("Content", RequestTextMessage.class, "content");
 96             xstream.aliasField("MsgId", RequestTextMessage.class, "msgId");
 97            
 98             RequestTextMessage requestTextMessage = (RequestTextMessage)xstream.fromXML(xml); 
 99             return requestTextMessage;
100     }
101 //    回复文本消息
102     private String getReplyTextMessage(String content, String fromUserName,String toUserName){
103         
104         ReplyTextMessage we = new ReplyTextMessage();
105         we.setMessageType("text");
106         we.setFuncFlag("0");
107         we.setCreateTime(new Long(new Date().getTime()).toString());
108         we.setContent(content);
109         we.setToUserName(fromUserName);  
110         we.setFromUserName(toUserName);
111         XStream xstream = new XStream(new DomDriver()); 
112         xstream.alias("xml", ReplyTextMessage.class);
113         xstream.aliasField("ToUserName", ReplyTextMessage.class, "toUserName");
114         xstream.aliasField("FromUserName", ReplyTextMessage.class, "fromUserName");
115         xstream.aliasField("CreateTime", ReplyTextMessage.class, "createTime");
116         xstream.aliasField("MsgType", ReplyTextMessage.class, "messageType");
117         xstream.aliasField("Content", ReplyTextMessage.class, "content");
118         xstream.aliasField("FuncFlag", ReplyTextMessage.class, "funcFlag");
119         String xml =xstream.toXML(we);
120         return xml;
121     }
122 //    回复音乐消息
123     private String getReplyMusicMessage(String fromUserName,String toUserName){
124            
125             ReplyMusicMessage we = new ReplyMusicMessage();
126             Music music = new Music();
127             
128             we.setMessageType("music");
129             we.setCreateTime(new Long(new Date().getTime()).toString());
130             we.setToUserName(fromUserName);  
131             we.setFromUserName(toUserName);
132             we.setFuncFlag("0");
133             
134             music.setTitle("回家|X-man");
135             music.setDescription("萨克斯 回家  勾起你想家的愁思...");
136             
137             String url = "http://bcs.duapp.com/yishi-music/%E5%9B%9E%E5%AE%B6.mp3?sign=MBO:97068c69ccb2ab230a497c59d528dcce:LdYZ%2FLXohKa6YCy9gbxL%2B1mZ4Co%3D";
138             String url2 = "http://bcs.duapp.com/yishi-music/X-man.mp3?sign=MBO:97068c69ccb2ab230a497c59d528dcce:cYV%2B%2Fq2Tlv2de6gqecZynCyIm3k%3D";
139             music.setMusicUrl(url);
140             music.setHqMusicUrl(url2);
141             
142             we.setMusic(music);
143             
144             XStream xstream = new XStream(new DomDriver()); 
145             xstream.alias("xml", ReplyMusicMessage.class);
146             xstream.aliasField("ToUserName", ReplyMusicMessage.class, "toUserName");
147             xstream.aliasField("FromUserName", ReplyMusicMessage.class, "fromUserName");
148             xstream.aliasField("CreateTime", ReplyMusicMessage.class, "createTime");
149             xstream.aliasField("MsgType", ReplyMusicMessage.class, "messageType");
150             xstream.aliasField("FuncFlag", ReplyMusicMessage.class, "funcFlag");
151             xstream.aliasField("Music", ReplyMusicMessage.class, "Music");
152             
153             xstream.aliasField("Title", Music.class, "title");
154             xstream.aliasField("Description", Music.class, "description");
155             xstream.aliasField("MusicUrl", Music.class, "musicUrl");
156             xstream.aliasField("HQMusicUrl", Music.class, "hqMusicUrl");
157            
158             String xml =xstream.toXML(we);
159             return xml;
160     }
161     
162 //    回复图文消息
163     private String getReplyTuwenMessage(String fromUserName,String toUserName){
164         
165         ReplyTuwenMessage we = new ReplyTuwenMessage();
166 
167         Articles articles = new Articles();
168         
169         Item item = new Item();
170         
171         we.setMessageType("news");
172         we.setCreateTime(new Long(new Date().getTime()).toString());
173         we.setToUserName(fromUserName);  
174         we.setFromUserName(toUserName);
175         we.setFuncFlag("0");
176         we.setArticleCount(1);
177          
178         item.setTitle("俊介");
179         item.setDescription("俊介（SHUNSUKE）是Twitter上现在最流行的偶像犬，是哈多利系博美犬（即俗称英系博美），因为在网上卖萌而走红网络。");
180         item.setPicUrl("http://bcs.duapp.com/yishi-music/111.jpg?sign=MBO:97068c69ccb2ab230a497c59d528dcce:hmzcBYxgI4yUaTd9GvahO1GvE%2BA%3D");
181         item.setUrl("http://baike.baidu.com/view/6300265.htm");        
182        
183         articles.setItem(item);
184         we.setArticles(articles);
185          
186         XStream xstream = new XStream(new DomDriver()); 
187         xstream.alias("xml", ReplyTuwenMessage.class);
188         xstream.aliasField("ToUserName", ReplyTuwenMessage.class, "toUserName");
189         xstream.aliasField("FromUserName", ReplyTuwenMessage.class, "fromUserName");
190         xstream.aliasField("CreateTime", ReplyTuwenMessage.class, "createTime");
191         xstream.aliasField("MsgType", ReplyTuwenMessage.class, "messageType");
192         xstream.aliasField("Articles", ReplyTuwenMessage.class, "Articles");
193         
194         xstream.aliasField("ArticleCount", ReplyTuwenMessage.class, "articleCount");
195         xstream.aliasField("FuncFlag", ReplyTuwenMessage.class, "funcFlag");
196         
197         xstream.aliasField("item", Articles.class, "item");
198         
199         xstream.aliasField("Title", Item.class, "title");
200         xstream.aliasField("Description", Item.class, "description");
201         xstream.aliasField("PicUrl", Item.class, "picUrl");
202         xstream.aliasField("Url", Item.class, "url");
203        
204         String xml =xstream.toXML(we);
205         return xml;
206     }
207 
208 }

WbChat

 1 public class ReplyMusicMessage {
 2 
 3     private String toUserName;
 4     private String fromUserName;
 5     private String createTime;
 6     private String messageType;
 7     private Music Music;
 8     private String funcFlag;
 9 //这里的funcFlag，微信平台接口文档里没有，但是必须写上，不然会收不到返回的信息
10 //getters、setters
11 }

ReplyMusicMessage

 1 public class ReplyTextMessage {
 2 
 3         private String toUserName;
 4         private String fromUserName;
 5         private String createTime;
 6         private String messageType;
 7         private String content;
 8         private String funcFlag;
 9 // getters,setters
10 }

ReplyTextMessage

 1 public class ReplyTuwenMessage {
 2 
 3     private String toUserName;
 4     private String fromUserName;
 5     private String createTime;
 6     private String messageType;
 7     private int articleCount;
 8     
 9     private Articles Articles;
10     private String funcFlag;
11 //getters,setters
12 }

ReplyTuwenMessage

1 public class RequestTextMessage {
2     private String toUserName;
3     private String fromUserName;
4     private String createTime;
5     private String messageType;
6     private String content;
7     private String msgId;
8 //getters,setters    
9 }

RequestTextMessage

 1 public class Articles {
 2 
 3     private Item item;
 4 
 5     public Item getItem() {
 6         return item;
 7     }
 8 
 9     public void setItem(Item item) {
10         this.item = item;
11     }
12     
13     
14 }

Articles

1 public class Item {
2 
3     private String title;
4     private String description;
5     private String picUrl;
6     private String url;
7 //getters,setters    
8 }

Item

1 public class Music {
2 
3     private String title;
4     private String description;
5     private String musicUrl;
6     private String hqMusicUrl;
7 //getters,setters    
8 }

Music

1 <servlet>   
2     <servlet-name>Test</servlet-name>
3     <servlet-class>com.main.WbChat</servlet-class>   
4   </servlet>  
5   <servlet-mapping>   
6     <servlet-name>Test</servlet-name>   
7     <url-pattern>/wbchat</url-pattern>   
8   </servlet-mapping>

web.xml配置

还要加四个jar包：