说明：本次的教程主要是对微信公众平台开发人员模式的解说，网络上非常多类似文章，但非常多都让初学微信开发的人一头雾水，所以总结自己的微信开发经验，将微信开发的整个过程系统的列出，并对主要代码进行解说分析，让刚開始学习的人尽快上手。在阅读本文之前，应对微信公众平台的官方开发文档有所了解，知道接收和发送的都是xml格式的数据。另外，在做内容回复时用到了，这是一个自然语言解析的开放平台，能够帮我们解决整个微信开发过程中最困难的问题，此处不多讲，以下会有其具体的调用方式。
1.1 在登录微信官方平台之后，开启开发人员模式，此时须要我们填写url和token，所谓url就是我们自己server的接口，用WechatServlet.java来实现，相关解释已经在凝视中说明，代码例如以下：
package demo.servlet;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import demo.process.WechatProcess;/** * 微信服务端收发消息接口 * * @author pamchen-1 * */public class WechatServlet extends HttpServlet { /** * The doGet method of the servlet. * * This method is called when a form has its tag value method equals to get. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); /** 读取接收到的xml消息 */ StringBuffer sb = new StringBuffer(); InputStream is = request.getInputStream(); InputStreamReader isr = new InputStreamReader(is, "UTF-8"); BufferedReader br = new BufferedReader(isr); String s = ""; while ((s = br.readLine()) != null) { sb.append(s); } String xml = sb.toString(); //次即为接收到微信端发送过来的xml数据 String result = ""; /** 推断是否是微信接入激活验证，仅仅有首次接入验证时才会收到echostr參数，此时须要把它直接返回 */ String echostr = request.getParameter("echostr"); if (echostr != null && echostr.length() > 1) { result = echostr; } else { //正常的微信处理流程 result = new WechatProcess().processWechatMag(xml); } try { OutputStream os = response.getOutputStream(); os.write(result.getBytes("UTF-8")); os.flush(); os.close(); } catch (Exception e) { e.printStackTrace(); } } /** * The doPost method of the servlet. * * This method is called when a form has its tag value method equals to * post. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); }} 1.2 对应的web.xml配置信息例如以下，在生成WechatServlet.java的同一时候，可自己主动生成web.xml中的配置。前面所提到的url处能够填写比如：http;//server地址/项目名/wechat.do
This is the description of my J2EE component This is the display name of my J2EE component WechatServlet demo.servlet.WechatServlet WechatServlet /wechat.do index.jsp
1.3 通过以上代码，我们已经实现了微信公众平台开发的框架，即开通开发人员模式并成功接入、接收消息和发送消息这三个步骤。
以下就解说其核心部分——解析接收到的xml数据，并以文本类消息为例，通过图灵机器人api接口实现智能回复。2.1 首先看一下总体流程处理代码，包含：xml数据处理、调用图灵api、封装返回的xml数据。package demo.process;import java.util.Date;import demo.entity.ReceiveXmlEntity;/** * 微信xml消息处理流程逻辑类 * @author pamchen-1 * */public class WechatProcess { /** * 解析处理xml、获取智能回复结果（通过图灵机器人api接口） * @param xml 接收到的微信数据 * @return 终于的解析结果（xml格式数据） */ public String processWechatMag(String xml){ /** 解析xml数据 */ ReceiveXmlEntity xmlEntity = new ReceiveXmlProcess().getMsgEntity(xml); /** 以文本消息为例，调用图灵机器人api接口，获取回复内容 */ String result = ""; if("text".endsWith(xmlEntity.getMsgType())){ result = new TulingApiProcess().getTulingResult(xmlEntity.getContent()); } /** 此时，假设用户输入的是“你好”，在经过上面的过程之后，result为“你也好”相似的内容 * 由于终于回复给微信的也是xml格式的数据，全部须要将其封装为文本类型返回消息 * */ result = new FormatXmlProcess().formatXmlAnswer(xmlEntity.getFromUserName(), xmlEntity.getToUserName(), result); return result; }} 2.2 解析接收到的xml数据，此处有两个类，ReceiveXmlEntity.java和ReceiveXmlProcess.java，通过反射的机制动态调用实体类中的set方法，能够避免非常多反复的推断，提高代码效率，代码例如以下：
package demo.entity;/** * 接收到的微信xml实体类 * @author pamchen-1 * */public class ReceiveXmlEntity { private String ToUserName=""; private String FromUserName=""; private String CreateTime=""; private String MsgType=""; private String MsgId=""; private String Event=""; private String EventKey=""; private String Ticket=""; private String Latitude=""; private String Longitude=""; private String Precision=""; private String PicUrl=""; private String MediaId=""; private String Title=""; private String Description=""; private String Url=""; private String Location_X=""; private String Location_Y=""; private String Scale=""; private String Label=""; private String Content=""; private String Format=""; private String Recognition=""; public String getRecognition() { return Recognition; } public void setRecognition(String recognition) { Recognition = recognition; } public String getFormat() { return Format; } public void setFormat(String format) { Format = format; } public String getContent() { return Content; } public void setContent(String content) { Content = content; } public String getLocation_X() { return Location_X; } public void setLocation_X(String locationX) { Location_X = locationX; } public String getLocation_Y() { return Location_Y; } public void setLocation_Y(String locationY) { Location_Y = locationY; } public String getScale() { return Scale; } public void setScale(String scale) { Scale = scale; } public String getLabel() { return Label; } public void setLabel(String label) { Label = label; } public String getTitle() { return Title; } public void setTitle(String title) { Title = title; } public String getDescription() { return Description; } public void setDescription(String description) { Description = description; } public String getUrl() { return Url; } public void setUrl(String url) { Url = url; } public String getPicUrl() { return PicUrl; } public void setPicUrl(String picUrl) { PicUrl = picUrl; } public String getMediaId() { return MediaId; } public void setMediaId(String mediaId) { MediaId = mediaId; } public String getEventKey() { return EventKey; } public void setEventKey(String eventKey) { EventKey = eventKey; } public String getTicket() { return Ticket; } public void setTicket(String ticket) { Ticket = ticket; } public String getLatitude() { return Latitude; } public void setLatitude(String latitude) { Latitude = latitude; } public String getLongitude() { return Longitude; } public void setLongitude(String longitude) { Longitude = longitude; } public String getPrecision() { return Precision; } public void setPrecision(String precision) { Precision = precision; } public String getEvent() { return Event; } public void setEvent(String event) { Event = event; } public String getMsgId() { return MsgId; } public void setMsgId(String msgId) { MsgId = msgId; } public String getToUserName() { return ToUserName; } public void setToUserName(String toUserName) { ToUserName = toUserName; } public String getFromUserName() { return FromUserName; } public void setFromUserName(String fromUserName) { FromUserName = fromUserName; } public String getCreateTime() { return CreateTime; } public void setCreateTime(String createTime) { CreateTime = createTime; } public String getMsgType() { return MsgType; } public void setMsgType(String msgType) { MsgType = msgType; }} package demo.process;import java.lang.reflect.Field;import java.lang.reflect.Method;import java.util.Iterator;import org.dom4j.Document;import org.dom4j.DocumentHelper;import org.dom4j.Element;import demo.entity.ReceiveXmlEntity;/** * 解析接收到的微信xml，返回消息对象 * @author pamchen-1 * */public class ReceiveXmlProcess { /** * 解析微信xml消息 * @param strXml * @return */ public ReceiveXmlEntity getMsgEntity(String strXml){ ReceiveXmlEntity msg = null; try { if (strXml.length() <= 0 || strXml == null) return null; // 将字符串转化为XML文档对象 Document document = DocumentHelper.parseText(strXml); // 获得文档的根节点 Element root = document.getRootElement(); // 遍历根节点下全部子节点 Iterator iter = root.elementIterator(); // 遍历全部结点 msg = new ReceiveXmlEntity(); //利用反射机制，调用set方法 //获取该实体的元类型 Class c = Class.forName("demo.entity.ReceiveXmlEntity"); msg = (ReceiveXmlEntity)c.newInstance();//创建这个实体的对象 while(iter.hasNext()){ Element ele = (Element)iter.next(); //获取set方法中的參数字段（实体类的属性） Field field = c.getDeclaredField(ele.getName()); //获取set方法，field.getType())获取它的參数数据类型 Method method = c.getDeclaredMethod("set"+ele.getName(), field.getType()); //调用set方法 method.invoke(msg, ele.getText()); } } catch (Exception e) { // TODO: handle exception System.out.println("xml 格式异常: "+ strXml); e.printStackTrace(); } return msg; }} 2.3 调用图灵机器人api接口，获取智能回复内容：
package demo.process;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;import org.apache.http.HttpResponse;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.HttpClients;import org.apache.http.util.EntityUtils;import org.json.JSONException;import org.json.JSONObject;/** * 调用图灵机器人api接口，获取智能回复内容 * @author pamchen-1 * */public class TulingApiProcess { /** * 调用图灵机器人api接口，获取智能回复内容，解析获取自己所需结果 * @param content * @return */ public String getTulingResult(String content){ /** 此处为图灵api接口，參数key须要自己去注冊申请，先以11111111取代 */ String apiUrl = "http://www.tuling123.com/openapi/api?key=11111111&info="; String param = ""; try { param = apiUrl+URLEncoder.encode(content,"utf-8"); } catch (UnsupportedEncodingException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } //将參数转为url编码 /** 发送httpget请求 */ HttpGet request = new HttpGet(param); String result = ""; try { HttpResponse response = HttpClients.createDefault().execute(request); if(response.getStatusLine().getStatusCode()==200){ result = EntityUtils.toString(response.getEntity()); } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } /** 请求失败处理 */ if(null==result){ return "对不起，你说的话真是太高深了……"; } try { JSONObject json = new JSONObject(result); //以code=100000为例，參考图灵机器人api文档 if(100000==json.getInt("code")){ result = json.getString("text"); } } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } return result; }} 2.4 将结果封装为微信规定的xml格式，并返回给1.1中创建的servlet接口。
package demo.process;import java.util.Date;/** * 封装终于的xml格式结果 * @author pamchen-1 * */public class FormatXmlProcess { /** * 封装文字类的返回消息 * @param to * @param from * @param content * @return */ public String formatXmlAnswer(String to, String from, String content) { StringBuffer sb = new StringBuffer(); Date date = new Date(); sb.append(" "); sb.append(date.getTime()); sb.append(" 0 "); return sb.toString(); }} 总结，以上便是微信公众平台开发的所有流程，总体来看并不复杂，要很感谢图灵机器人提供的api接口，帮我们攻克了智能回复这一高难度问题。其它类型的消息处理与演示样例中类似，有兴趣的开发人员能够联系我进行交流学习，希望本文对大家有所帮助。
本问中的代码演示样例已经上传到了csdn的个人资源中，有须要的能够去下载：http://download.csdn.net/detail/pamchen/7793979