說明：
本次的教程主要是對微信公衆平臺開發者模式的講解，網絡上很多類似文章，但很多都讓初學微信開發的人一頭霧水，所以總結自己的微信開發經驗，將微信開發的整個過程系統的列出，並對主要代碼進行講解分析，讓初學者儘快上手。

在閱讀本文之前，應對微信公衆平臺的官方開發文檔有所瞭解，知道接收和發送的都是xml格式的數據。另外，在做內容回覆時用到了圖靈機器人的api接口，這是一個自然語言解析的開放平臺，可以幫我們解決整個微信開發過程中最困難的問題，此處不多講，下面會有其詳細的調用方式。

1.1 在登錄微信官方平臺之後，開啓開發者模式，此時需要我們填寫url和token，所謂url就是我們自己服務器的接口，用WechatServlet.java來實現，相關解釋已經在註釋中說明，代碼如下：

[java] view plain copy print ?

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;
/**
* 微信服務端收發消息接口
*
* @author pamchen-1
*
*/
public class WechatServlet extends HttpServlet {
/**
* The doGet method of the servlet. <br>
*
* 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");
/** 讀取接收到的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(); //次即爲接收到微信端發送過來的xml數據
String result = "";
/** 判斷是否是微信接入激活驗證，只有首次接入驗證時纔會收到echostr參數，此時需要把它直接返回 */
String echostr = request.getParameter("echostr");
if (echostr != null && echostr.length() > 1) {
result = echostr;
} else {
//正常的微信處理流程
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. <br>
*
* 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);
}
}

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;
/**
 * 微信服務端收發消息接口
 * 
 * @author pamchen-1
 * 
 */
public class WechatServlet extends HttpServlet {

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * 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");

		/** 讀取接收到的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();	//次即爲接收到微信端發送過來的xml數據

		String result = "";
		/** 判斷是否是微信接入激活驗證，只有首次接入驗證時纔會收到echostr參數，此時需要把它直接返回 */
		String echostr = request.getParameter("echostr");
		if (echostr != null && echostr.length() > 1) {
			result = echostr;
		} else {
			//正常的微信處理流程
			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. <br>
	 * 
	 * 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 相應的web.xml配置信息如下，在生成WechatServlet.java的同時，可自動生成web.xml中的配置。前面所提到的url處可以填寫例如：http;//服務器地址/項目名/wechat.do

[html] view plain copy print ?

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>WechatServlet</servlet-name>
<servlet-class>demo.servlet.WechatServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>WechatServlet</servlet-name>
<url-pattern>/wechat.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>WechatServlet</servlet-name>
    <servlet-class>demo.servlet.WechatServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>WechatServlet</servlet-name>
    <url-pattern>/wechat.do</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

1.3 通過以上代碼，我們已經實現了微信公衆平臺開發的框架，即開通開發者模式併成功接入、接收消息和發送消息這三個步驟。

下面就講解其核心部分——解析接收到的xml數據，並以文本類消息爲例，通過圖靈機器人api接口實現智能回覆。

2.1 首先看一下整體流程處理代碼，包括：xml數據處理、調用圖靈api、封裝返回的xml數據。

[java] view plain copy print ?

package demo.process;
import java.util.Date;
import demo.entity.ReceiveXmlEntity;
/**
* 微信xml消息處理流程邏輯類
* @author pamchen-1
*
*/
public class WechatProcess {
/**
* 解析處理xml、獲取智能回覆結果（通過圖靈機器人api接口）
* @param xml 接收到的微信數據
* @return 最終的解析結果（xml格式數據）
*/
public String processWechatMag(String xml){
/** 解析xml數據 */
ReceiveXmlEntity xmlEntity = new ReceiveXmlProcess().getMsgEntity(xml);
/** 以文本消息爲例，調用圖靈機器人api接口，獲取回覆內容 */
String result = "";
if("text".endsWith(xmlEntity.getMsgType())){
result = new TulingApiProcess().getTulingResult(xmlEntity.getContent());
}
/** 此時，如果用戶輸入的是“你好”，在經過上面的過程之後，result爲“你也好”類似的內容
* 因爲最終回覆給微信的也是xml格式的數據，所有需要將其封裝爲文本類型返回消息
* */
result = new FormatXmlProcess().formatXmlAnswer(xmlEntity.getFromUserName(), xmlEntity.getToUserName(), result);
return result;
}
}

package demo.process;

import java.util.Date;

import demo.entity.ReceiveXmlEntity;

/**
 * 微信xml消息處理流程邏輯類
 * @author pamchen-1
 *
 */
public class WechatProcess {
	/**
	 * 解析處理xml、獲取智能回覆結果（通過圖靈機器人api接口）
	 * @param xml 接收到的微信數據
	 * @return	最終的解析結果（xml格式數據）
	 */
	public String processWechatMag(String xml){
		/** 解析xml數據 */
		ReceiveXmlEntity xmlEntity = new ReceiveXmlProcess().getMsgEntity(xml);
		
		/** 以文本消息爲例，調用圖靈機器人api接口，獲取回覆內容 */
		String result = "";
		if("text".endsWith(xmlEntity.getMsgType())){
			result = new TulingApiProcess().getTulingResult(xmlEntity.getContent());
		}
		
		/** 此時，如果用戶輸入的是“你好”，在經過上面的過程之後，result爲“你也好”類似的內容 
		 *  因爲最終回覆給微信的也是xml格式的數據，所有需要將其封裝爲文本類型返回消息
		 * */
		result = new FormatXmlProcess().formatXmlAnswer(xmlEntity.getFromUserName(), xmlEntity.getToUserName(), result);
		
		return result;
	}
}

2.2 解析接收到的xml數據，此處有兩個類，ReceiveXmlEntity.java和ReceiveXmlProcess.java，通過反射的機制動態調用實體類中的set方法，可以避免很多重複的判斷，提高代碼效率，代碼如下：

[java] view plain copy print ?

package demo.entity;
/**
* 接收到的微信xml實體類
* @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.entity;
/**
 * 接收到的微信xml實體類
 * @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;
	}
}

[java] view plain copy print ?

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，返回消息對象
* @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;
// 將字符串轉化爲XML文檔對象
Document document = DocumentHelper.parseText(strXml);
// 獲得文檔的根節點
Element root = document.getRootElement();
// 遍歷根節點下所有子節點
Iterator<?> iter = root.elementIterator();
// 遍歷所有結點
msg = new ReceiveXmlEntity();
//利用反射機制，調用set方法
//獲取該實體的元類型
Class<?> c = Class.forName("demo.entity.ReceiveXmlEntity");
msg = (ReceiveXmlEntity)c.newInstance();//創建這個實體的對象
while(iter.hasNext()){
Element ele = (Element)iter.next();
//獲取set方法中的參數字段（實體類的屬性）
Field field = c.getDeclaredField(ele.getName());
//獲取set方法，field.getType())獲取它的參數數據類型
Method method = c.getDeclaredMethod("set"+ele.getName(), field.getType());
//調用set方法
method.invoke(msg, ele.getText());
}
} catch (Exception e) {
// TODO: handle exception
System.out.println("xml 格式異常: "+ strXml);
e.printStackTrace();
}
return msg;
}
}

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，返回消息對象
 * @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;
			 
			// 將字符串轉化爲XML文檔對象
			Document document = DocumentHelper.parseText(strXml);
			// 獲得文檔的根節點
			Element root = document.getRootElement();
			// 遍歷根節點下所有子節點
			Iterator<?> iter = root.elementIterator();
			
			// 遍歷所有結點
			msg = new ReceiveXmlEntity();
			//利用反射機制，調用set方法
			//獲取該實體的元類型
			Class<?> c = Class.forName("demo.entity.ReceiveXmlEntity");
			msg = (ReceiveXmlEntity)c.newInstance();//創建這個實體的對象
			
			while(iter.hasNext()){
				Element ele = (Element)iter.next();
				//獲取set方法中的參數字段（實體類的屬性）
				Field field = c.getDeclaredField(ele.getName());
				//獲取set方法，field.getType())獲取它的參數數據類型
				Method method = c.getDeclaredMethod("set"+ele.getName(), field.getType());
				//調用set方法
				method.invoke(msg, ele.getText());
			}
		} catch (Exception e) {
			// TODO: handle exception
			System.out.println("xml 格式異常: "+ strXml);
			e.printStackTrace();
		}
		return msg;
	}
}

2.3 調用圖靈機器人api接口，獲取智能回覆內容：

[java] view plain copy print ?

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;
/**
* 調用圖靈機器人api接口，獲取智能回覆內容
* @author pamchen-1
*
*/
public class TulingApiProcess {
/**
* 調用圖靈機器人api接口，獲取智能回覆內容，解析獲取自己所需結果
* @param content
* @return
*/
public String getTulingResult(String content){
/** 此處爲圖靈api接口，參數key需要自己去註冊申請，先以11111111代替 */
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();
} //將參數轉爲url編碼
/** 發送httpget請求 */
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();
}
/** 請求失敗處理 */
if(null==result){
return "對不起，你說的話真是太高深了……";
}
try {
JSONObject json = new JSONObject(result);
//以code=100000爲例，參考圖靈機器人api文檔
if(100000==json.getInt("code")){
result = json.getString("text");
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
}

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;

/**
 * 調用圖靈機器人api接口，獲取智能回覆內容
 * @author pamchen-1
 *
 */
public class TulingApiProcess {
	/**
	 * 調用圖靈機器人api接口，獲取智能回覆內容，解析獲取自己所需結果
	 * @param content
	 * @return
	 */
	public String getTulingResult(String content){
		/** 此處爲圖靈api接口，參數key需要自己去註冊申請，先以11111111代替 */
		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();
		} //將參數轉爲url編碼
		
		/** 發送httpget請求 */
		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();
		}
		/** 請求失敗處理 */
		if(null==result){
			return "對不起，你說的話真是太高深了……";
		}
		
		try {
			JSONObject json = new JSONObject(result);
			//以code=100000爲例，參考圖靈機器人api文檔
			if(100000==json.getInt("code")){
				result = json.getString("text");
			}
		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return result;
	}
}

2.4 將結果封裝爲微信規定的xml格式，並返回給1.1中創建的servlet接口。

[java] view plain copy print ?

package demo.process;
import java.util.Date;
/**
* 封裝最終的xml格式結果
* @author pamchen-1
*
*/
public class FormatXmlProcess {
/**
* 封裝文字類的返回消息
* @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("<xml><ToUserName><![CDATA[");
sb.append(to);
sb.append("]]></ToUserName><FromUserName><![CDATA[");
sb.append(from);
sb.append("]]></FromUserName><CreateTime>");
sb.append(date.getTime());
sb.append("</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[");
sb.append(content);
sb.append("]]></Content><FuncFlag>0</FuncFlag></xml>");
return sb.toString();
}
}

package demo.process;

import java.util.Date;
/**
 * 封裝最終的xml格式結果
 * @author pamchen-1
 *
 */
public class FormatXmlProcess {
	/**
	 * 封裝文字類的返回消息
	 * @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("<xml><ToUserName><![CDATA[");
		sb.append(to);
		sb.append("]]></ToUserName><FromUserName><![CDATA[");
		sb.append(from);
		sb.append("]]></FromUserName><CreateTime>");
		sb.append(date.getTime());
		sb.append("</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[");
		sb.append(content);
		sb.append("]]></Content><FuncFlag>0</FuncFlag></xml>");
		return sb.toString();
	}
}

總結，以上便是微信公衆平臺開發的全部流程，整體來看並不複雜，要非常感謝圖靈機器人提供的api接口，幫我們解決了智能回覆這一高難度問題。其他類型的消息處理與示例中類似，有興趣的開發者可以聯繫我進行交流學習，希望本文對大家有所幫助。

原文地址：http://blog.csdn.net/pamchen/article/details/38718947

微信公衆平臺java開發詳解

1.1 在登錄微信官方平臺之後，開啓開發者模式，此時需要我們填寫url和token，所謂url就是我們自己服務器的接口，用WechatServlet.java來實現，相關解釋已經在註釋中說明，代碼如下：

1.2 相應的web.xml配置信息如下，在生成WechatServlet.java的同時，可自動生成web.xml中的配置。前面所提到的url處可以填寫例如：http;//服務器地址/項目名/wechat.do

1.3 通過以上代碼，我們已經實現了微信公衆平臺開發的框架，即開通開發者模式併成功接入、接收消息和發送消息這三個步驟。

2.2 解析接收到的xml數據，此處有兩個類，ReceiveXmlEntity.java和ReceiveXmlProcess.java，通過反射的機制動態調用實體類中的set方法，可以避免很多重複的判斷，提高代碼效率，代碼如下：

2.3 調用圖靈機器人api接口，獲取智能回覆內容：

2.4 將結果封裝爲微信規定的xml格式，並返回給1.1中創建的servlet接口。

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