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<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/hint.css/2.4.1/hint.min.css"><p>今天看论文资料看到了DeepQA深度问答系统，而国内的图灵机器人正是基于DeepQA实现的，对中文语义理解的准确率挺高。就尝试做了个基于微信图灵机器人。之前开发微信一直用的PHP，这次尝试用Java开发。</p>
<ul>
<li>首先编写servlet进行消息验证 <figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div></pre></td><td class="code"><pre><div class="line"></div><div class="line">protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {</div><div class="line"> // TODO Auto-generated method stub</div><div class="line"> String signature = request.getParameter("signature");</div><div class="line"> String timestamp = request.getParameter("timestamp");</div><div class="line"> String nonce = request.getParameter("nonce");</div><div class="line"> String echostr = request.getParameter("echostr");</div><div class="line"> PrintWriter out = response.getWriter();</div><div class="line"> if(CheckUtil.checkSignature(signature, timestamp, nonce)) {</div><div class="line"> out.print(echostr);</div><div class="line"> }</div><div class="line"> </div><div class="line"> }</div></pre></td></tr></table></figure></li>
</ul>
<p>将token、timestamp、nonce三个参数进行字典序排序，再将三个参数字符串拼接成一个字符串进行sha1加密，加密后的字符串可与signature对比，标识该请求来源于微信，若确认此次GET请求来自微信服务器，请原样返回echostr参数内容 <figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div></pre></td><td class="code"><pre><div class="line"></div><div class="line">public static boolean checkSignature(String signature,String timestamp,String nonce) {</div><div class="line"> String arr[] = new String[]{token,timestamp,nonce};</div><div class="line"> //排序</div><div class="line"> Arrays.sort(arr);</div><div class="line"> //生成字符串</div><div class="line"> StringBuffer content = new StringBuffer();</div><div class="line"> for(int i = 0;i < arr.length;i++) {</div><div class="line"> content.append(arr[i]);</div><div class="line"> }</div><div class="line"> //sha1加密</div><div class="line"> String temp = getSha1(content.toString());</div><div class="line"> return temp.equals(signature);</div><div class="line"> }</div></pre></td></tr></table></figure></p>
<p>附：sha1加密算法： <figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div></pre></td><td class="code"><pre><div class="line">public static String getSha1(String str){</div><div class="line"> if (null == str || 0 == str.length()){</div><div class="line"> return null;</div><div class="line"> }</div><div class="line"> char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', </div><div class="line"> 'a', 'b', 'c', 'd', 'e', 'f'};</div><div class="line"> try {</div><div class="line"> MessageDigest mdTemp = MessageDigest.getInstance("SHA1");</div><div class="line"> mdTemp.update(str.getBytes("UTF-8"));</div><div class="line"> </div><div class="line"> byte[] md = mdTemp.digest();</div><div class="line"> int j = md.length;</div><div class="line"> char[] buf = new char[j * 2];</div><div class="line"> int k = 0;</div><div class="line"> for (int i = 0; i < j; i++) {</div><div class="line"> byte byte0 = md[i];</div><div class="line"> buf[k++] = hexDigits[byte0 >>> 4 & 0xf];</div><div class="line"> buf[k++] = hexDigits[byte0 & 0xf];</div><div class="line"> }</div><div class="line"> return new String(buf);</div><div class="line"> } catch (Exception e) {</div><div class="line"> return null;</div><div class="line"> }</div><div class="line"> }</div></pre></td></tr></table></figure></p>
<ul>
<li>其次接受xml格式的消息，并转换为对象格式</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div></pre></td><td class="code"><pre><div class="line">public static ReceiveXmlEntity getMsgEntity(String content){</div><div class="line"> ReceiveXmlEntity msg = null;</div><div class="line"> try{</div><div class="line"> // 将字符串转换为xml对象</div><div class="line"> Document doc = DocumentHelper.parseText(content);</div><div class="line"> //获取文档的根节点</div><div class="line"> Element root = doc.getRootElement();</div><div class="line"> //遍历根节点下所有的子结点</div><div class="line"> Iterator<?> iter = root.elementIterator();</div><div class="line"> //利用反射机制，调用对象的set方法</div><div class="line"> Class<?> c = Class.forName("com.wechat.entity.ReceiveXmlEntity");</div><div class="line"> //创建实体类</div><div class="line"> msg = (ReceiveXmlEntity)c.newInstance();</div><div class="line"> while(iter.hasNext()){</div><div class="line"> Element ele = (Element)iter.next();</div><div class="line"> //获取set方法中的参数字段（实体类的属性）</div><div class="line"> Field filed = c.getDeclaredField(ele.getName());</div><div class="line"> //获取set方法</div><div class="line"> Method method = c.getDeclaredMethod("set"+ele.getName(), filed.getType());</div><div class="line"> //调用set方法</div><div class="line"> method.invoke(msg, ele.getText());</div><div class="line"> }</div><div class="line"> }catch(Exception e){</div><div class="line"> e.printStackTrace();</div><div class="line"> }</div><div class="line"> return msg;</div><div class="line"> }</div></pre></td></tr></table></figure>
<ul>
<li>调用图灵机器人接口处理模块，获取图灵机器人的结果</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div></pre></td><td class="code"><pre><div class="line">public String getTulingRe(String info){</div><div class="line"> //调用图灵机器人接口api，获取结果</div><div class="line"> String url = "http://www.tuling123.com/openapi/api?key=自己的秘钥&info="+info;</div><div class="line"> String tlResult = HttpGetRequest.get(url);</div><div class="line"> //解析图灵结果数据，提取所需内容</div><div class="line"> JSONObject json = JSONObject.fromObject(tlResult);</div><div class="line"> tlResult = json.getString("text");</div><div class="line"> return tlResult;</div><div class="line"> }</div></pre></td></tr></table></figure>
<ul>
<li><p>封装xml接口的返回数据 <figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div></pre></td><td class="code"><pre><div class="line">public static String getXmlResult(ReceiveXmlEntity xml, String tlResult){</div><div class="line"> StringBuffer sb = new StringBuffer();</div><div class="line"> sb.append("<xml><ToUserName><![CDATA[");</div><div class="line"> sb.append(xml.getFromUserName());</div><div class="line"> sb.append("]]></ToUserName><FromUserName><![CDATA[");</div><div class="line"> sb.append(xml.getToUserName());</div><div class="line"> sb.append("]]></FromUserName><CreateTime>");</div><div class="line"> sb.append(new Date().getTime());</div><div class="line"> sb.append("</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[");</div><div class="line"> sb.append(tlResult);</div><div class="line"> sb.append("]]></Content></xml>");</div><div class="line"> return sb.toString();</div><div class="line"> }</div></pre></td></tr></table></figure></p></li>
<li><p>使用ngork进行公网映射 cmd输入 <figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">ngork http 8080</div></pre></td></tr></table></figure></p></li>
</ul>
<div class="figure">
<img src="http://cdn.sinacloud.net/myblog-image/2017/01-20/01.png" alt="公网映射">
<p class="caption">公网映射</p>
</div>
<ul>
<li>最后关注公众号即可，亲测准确性还是很高的： <img src="http://cdn.sinacloud.net/myblog-image/2017/01-20/02.png" alt="图灵机器人"></li>
</ul>
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