java接发加密文本消息

官方指南

https://mp.weixin.qq.com/wiki/1/5dc395cdeb98e9d23a8541cf0bab38ad.html

下载示例代码

https://mp.weixin.qq.com/wiki/static/assets/a5a22f38cb60228cb32ab61d9e4c414b.zip

需要里面的文件

 

 

开始之前是建立在服务器接入成功的情况下

微信会把公众号上的信息用post方式提交到设置的url

 

所以我在servlet里doPost处理请求

 

doPost方法

protectedvoid doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {         response.setCharacterEncoding("UTF-8");//设置编码         try {             //签名串             String msgSignature = request.getParameter("msg_signature");             // 时间戳             String timestamp = request.getParameter("timestamp");             // 随机数             String nonce = request.getParameter("nonce");                         //接收密文并解密             WXBizMsgCrypt pc = new WXBizMsgCrypt(token, encodingAesKey, appId);             String msgData = getMsgData(request); //流数据转成string             String resultXml = pc.decryptMsg(msgSignature, timestamp, nonce, msgData); //解密              //dom4j将xml数据转成map             SAXReader saxreader = new SAXReader();              Document doc = saxreader.read(new ByteArrayInputStream(resultXml.getBytes("UTF-8")));             Map<String, String> map = new HashMap<String, String>();             Element root = doc.getRootElement();             @SuppressWarnings("unchecked")             List<Element> list = root.elements();             for (Element e : list) {                 map.put(e.getName(), e.getText());             }             //加密并发送             // 对消息进行处理             String content = map.get("Content");             // 发送方帐号（一个OpenID）             String fromUserName = map.get("FromUserName");             // 开发者微信号             String toUserName = map.get("ToUserName");             // 消息类型             String msgType = map.get("MsgType");             // 默认回复一个"success"             String responseMessage = "success";             if ("text".equals(msgType)){//判断文本消息                 TextMessage textMessage = new TextMessage();//实体类                 textMessage.setMsgType("text");                 textMessage.setToUserName(fromUserName);                 textMessage.setFromUserName(toUserName);                 textMessage.setCreateTime(System.currentTimeMillis());                 textMessage.setContent("你才"+content);                 responseMessage = WechatMessageUtil.textMessageToXml(textMessage);//将实体转成xml格式             } //加密             String mingwen = pc.encryptMsg(responseMessage, timestamp, nonce);             System.out.println("加密后: " + mingwen);             //返回信息             PrintWriter out = response.getWriter();             out.print(mingwen);             out.flush();         } catch (Exception e) {             // TODO Auto-generated catch block             e.printStackTrace();         }     }

 

getMsgData（）方法获取数据流转成string

//获取xmlStr     private String getMsgData(HttpServletRequest reqest) throws Exception {         ServletInputStream is = reqest.getInputStream();         BufferedReader br = new BufferedReader(new InputStreamReader(is));         StringBuffer sb = new StringBuffer();         String aa;         while ((aa = br.readLine()) != null) {            sb.append(aa);         }         is.close();         br.close();         returnsb.toString();     }

 

TextMessage实体

publicclass TextMessage {     /**      * 开发者微信号      */     private String ToUserName;     /**      * 发送方帐号（一个OpenID）      */     private String FromUserName;     /**      * 消息创建时间（整型）      */     privatelongCreateTime;     /**      * 消息类型      */     private String MsgType;     /**      * 消息id，64位整型      */     private String MsgId;     /**      * 文本消息内容      */     private String Content;         public String getContent() {         returnContent;     }         publicvoid setContent(String content) {         Content = content;     }     public String getToUserName() {         returnToUserName;     }     publicvoid setToUserName(String toUserName) {         ToUserName = toUserName;     }     public String getFromUserName() {         returnFromUserName;     }     publicvoid setFromUserName(String fromUserName) {         FromUserName = fromUserName;     }     publiclong getCreateTime() {         returnCreateTime;     }     publicvoid setCreateTime(longcreateTime) {         CreateTime = createTime;     }     public String getMsgType() {         returnMsgType;     }     publicvoid setMsgType(String msgType) {         MsgType = msgType;     }     public String getMsgId() {         returnMsgId;     }     publicvoid setMsgId(String msgId) {         MsgId = msgId;     } }

 

WechatMessageUtil工具类

publicclass WechatMessageUtil {     /**      * 文本消息转化为xml      *      * @param textMessage      * @return      */     publicstatic String textMessageToXml(TextMessage textMessage) {         XStream xstream = new XStream();         xstream.alias("xml", textMessage.getClass());         returnxstream.toXML(textMessage);     } }