java微信公众号开发案例

package cn.jon.wechat.servlet; 
 
import java.io.IOException; 
import java.io.PrintWriter; 
 
import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
 
import cn.jon.wechat.service.AccountsService; 
import cn.jon.wechat.utils.SignUtil; 
 
public class AccountsServlet extends HttpServlet { 
 
 public AccountsServlet() { 
 super(); 
 } 
 
 
 public void destroy() { 
 super.destroy(); 
 // Put your code here 
 } 
 /** 
 * 确认请求来自于微信服务器 
 */ 
 
 public void doGet(HttpServletRequest request, HttpServletResponse response) 
 throws ServletException, IOException { 
 System.out.println("接口测试开始！！！"); 
 //微信加密签名 
 String signature = request.getParameter("signature"); 
 //时间戳 
 String timestamp = request.getParameter("timestamp"); 
 //随机数 
 String nonce = request.getParameter("nonce"); 
 //随机字符串 
 String echostr = request.getParameter("echostr"); 
 
 PrintWriter out = response.getWriter(); 
 //通过校验signature对请求进行校验，若校验成功则原样返回echostr，表示接入成功，否则接入失败 
 if(SignUtil.checkSignature(signature,timestamp,nonce)){ 
 out.print(echostr); 
 } 
 out.close(); 
 out = null; 
// response.encodeRedirectURL("success.jsp"); 
 
 
 } 
 /** 
 * 处理微信服务器发来的消息 
 */ 
 public void doPost(HttpServletRequest request, HttpServletResponse response) 
 throws ServletException, IOException { 
 //消息的接受、处理、响应 
 request.setCharacterEncoding("utf-8"); 
 response.setCharacterEncoding("utf-8"); 
 //调用核心业务类型接受消息、处理消息 
 String respMessage = AccountsService.processRequest(request); 
 
 //响应消息 
 PrintWriter out = response.getWriter(); 
 out.print(respMessage); 
 out.close(); 
 
 
 } 
 
 public void init() throws ServletException { 
 // Put your code here 
 } 
 
} 

package cn.jon.wechat.utils; 
 
import java.security.MessageDigest; 
import java.security.NoSuchAlgorithmException; 
import java.util.Arrays; 
import java.util.Iterator; 
import java.util.Map; 
import java.util.Set; 
import java.util.concurrent.ConcurrentHashMap; 
 
/** 
 * 请求校验工具类 
 * @author jon 
 */ 
public class SignUtil { 
 //与微信配置中的的Token一致 
 private static String token = ""; 
 
 public static boolean checkSignature(String signature, String timestamp, 
 String nonce) { 
 String[] arra = new String[]{token,timestamp,nonce}; 
 //将signature,timestamp,nonce组成数组进行字典排序 
 Arrays.sort(arra); 
 StringBuilder sb = new StringBuilder(); 
 for(int i=0;i<arra.length;i++){ 
 sb.append(arra[i]); 
 } 
 MessageDigest md = null; 
 String stnStr = null; 
 try { 
 md = MessageDigest.getInstance("SHA-1"); 
 byte[] digest = md.digest(sb.toString().getBytes()); 
 stnStr = byteToStr(digest); 
 } catch (NoSuchAlgorithmException e) { 
 // TODO Auto-generated catch block 
 e.printStackTrace(); 
 } 
 //释放内存 
 sb = null; 
 //将sha1加密后的字符串与signature对比，标识该请求来源于微信 
 return stnStr!=null?stnStr.equals(signature.toUpperCase()):false; 
 } 
 /** 
 * 将字节数组转换成十六进制字符串 
 * @param digestArra 
 * @return 
 */ 
 private static String byteToStr(byte[] digestArra) { 
 // TODO Auto-generated method stub 
 String digestStr = ""; 
 for(int i=0;i<digestArra.length;i++){ 
 digestStr += byteToHexStr(digestArra[i]); 
 } 
 return digestStr; 
 } 
 /** 
 * 将字节转换成为十六进制字符串 
 */ 
 private static String byteToHexStr(byte dByte) { 
 // TODO Auto-generated method stub 
 char[] Digit = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'}; 
 char[] tmpArr = new char[2]; 
 tmpArr[0] = Digit[(dByte>>>4)&0X0F]; 
 tmpArr[1] = Digit[dByte&0X0F]; 
 String s = new String(tmpArr); 
 return s; 
 } 
 
 public static void main(String[] args) { 
 /*byte dByte = 'A'; 
 System.out.println(byteToHexStr(dByte));*/ 
 Map<String,String> map = new ConcurrentHashMap<String, String>(); 
 map.put("4", "zhangsan"); 
 map.put("100", "lisi"); 
 Set set = map.keySet(); 
 Iterator iter = set.iterator(); 
 while(iter.hasNext()){ 
// String keyV = (String) iter.next(); 
 String key =(String)iter.next(); 
 System.out.println(map.get(key)); 
// System.out.println(map.get(iter.next())); 
 } 
 /*for(int i=0;i<map.size();i++){ 
 
 }*/ 
 } 
} 

package cn.jon.wechat.service; 
 
import java.util.Date; 
import java.util.Map; 
 
import javax.servlet.http.HttpServletRequest; 
 
import cn.jon.wechat.message.req.ImageMessage; 
import cn.jon.wechat.message.req.LinkMessage; 
import cn.jon.wechat.message.req.LocationMessage; 
import cn.jon.wechat.message.req.VideoMessage; 
import cn.jon.wechat.message.req.VoiceMessage; 
import cn.jon.wechat.message.resp.TextMessage; 
import cn.jon.wechat.utils.MessageUtil; 
 
/** 
 * 解耦，使控制层与业务逻辑层分离开来，主要处理请求，响应 
 * @author jon 
 */ 
public class AccountsService { 
 
 public static String processRequest(HttpServletRequest request) { 
 String respMessage = null; 
 //默认返回的文本消息内容 
 String respContent = "请求处理异常，请稍后尝试！"; 
 try { 
 //xml请求解析 
 Map<String,String> requestMap = MessageUtil.pareXml(request); 
 
 //发送方账号（open_id） 
 String fromUserName = requestMap.get("FromUserName"); 
 //公众账号 
 String toUserName = requestMap.get("ToUserName"); 
 //消息类型 
 String msgType = requestMap.get("MsgType"); 
 
 //默认回复此文本消息 
 TextMessage defaultTextMessage = new TextMessage(); 
 defaultTextMessage.setToUserName(fromUserName); 
 defaultTextMessage.setFromUserName(toUserName); 
 defaultTextMessage.setCreateTime(new Date().getTime()); 
 defaultTextMessage.setMsgType(MessageUtil.MESSSAGE_TYPE_TEXT); 
 defaultTextMessage.setFuncFlag(0); 
 // 由于href属性值必须用双引号引起，这与字符串本身的双引号冲突，所以要转义 
 defaultTextMessage.setContent("欢迎访问<a href=\"http://blog.csdn.net/j086924\">jon的博客</a>!"); 
// defaultTextMessage.setContent(getMainMenu()); 
 // 将文本消息对象转换成xml字符串 
 respMessage = MessageUtil.textMessageToXml(defaultTextMessage); 
 
 
 //文本消息 
 if(msgType.equals(MessageUtil.MESSSAGE_TYPE_TEXT)){ 
 //respContent = "Hi,您发送的是文本消息！"; 
 //回复文本消息 
 TextMessage textMessage = new TextMessage(); 
// textMessage.setToUserName(toUserName); 
// textMessage.setFromUserName(fromUserName); 
 //这里需要注意，否则无法回复消息给用户了 
 textMessage.setToUserName(fromUserName); 
 textMessage.setFromUserName(toUserName); 
 textMessage.setCreateTime(new Date().getTime()); 
 textMessage.setMsgType(MessageUtil.MESSSAGE_TYPE_TEXT); 
 textMessage.setFuncFlag(0); 
 respContent = "Hi，你发的消息是："+requestMap.get("Content"); 
 textMessage.setContent(respContent); 
 respMessage = MessageUtil.textMessageToXml(textMessage); 
 } 
 //图片消息 
 else if(msgType.equals(MessageUtil.MESSSAGE_TYPE_IMAGE)){ 
  
 ImageMessage imageMessage=new ImageMessage(); 
 imageMessage.setToUserName(fromUserName); 
 imageMessage.setFromUserName(toUserName); 
 imageMessage.setCreateTime(new Date().getTime()); 
 imageMessage.setMsgType(MessageUtil.MESSSAGE_TYPE_IMAGE); 
 //respContent=requestMap.get("PicUrl"); 
 imageMessage.setPicUrl("http://img24.pplive.cn//2013//07//24//12103112092_230X306.jpg"); 
 respMessage = MessageUtil.imageMessageToXml(imageMessage); 
 } 
 //地理位置 
 else if(msgType.equals(MessageUtil.MESSSAGE_TYPE_LOCATION)){ 
 LocationMessage locationMessage=new LocationMessage(); 
 locationMessage.setToUserName(fromUserName); 
 locationMessage.setFromUserName(toUserName); 
 locationMessage.setCreateTime(new Date().getTime()); 
 locationMessage.setMsgType(MessageUtil.MESSSAGE_TYPE_LOCATION); 
 locationMessage.setLocation_X(requestMap.get("Location_X")); 
 locationMessage.setLocation_Y(requestMap.get("Location_Y")); 
 locationMessage.setScale(requestMap.get("Scale")); 
 locationMessage.setLabel(requestMap.get("Label")); 
 respMessage = MessageUtil.locationMessageToXml(locationMessage); 
  
 } 
 
 //视频消息 
 else if(msgType.equals(MessageUtil.MESSSAGE_TYPE_VIDEO)){ 
 VideoMessage videoMessage=new VideoMessage(); 
 videoMessage.setToUserName(fromUserName); 
 videoMessage.setFromUserName(toUserName); 
 videoMessage.setCreateTime(new Date().getTime()); 
 videoMessage.setMsgType(MessageUtil.MESSSAGE_TYPE_VIDEO); 
 videoMessage.setMediaId(requestMap.get("MediaId")); 
 videoMessage.setThumbMediaId(requestMap.get("ThumbMediaId")); 
 respMessage = MessageUtil.videoMessageToXml(videoMessage); 
  
 } 
 //链接消息 
 else if(msgType.equals(MessageUtil.MESSSAGE_TYPE_LINK)){ 
 LinkMessage linkMessage=new LinkMessage(); 
 linkMessage.setToUserName(fromUserName); 
 linkMessage.setFromUserName(toUserName); 
 linkMessage.setCreateTime(new Date().getTime()); 
 linkMessage.setMsgType(MessageUtil.MESSSAGE_TYPE_LINK); 
 linkMessage.setTitle(requestMap.get("Title")); 
 linkMessage.setDescription(requestMap.get("Description")); 
 linkMessage.setUrl(requestMap.get("Url")); 
 respMessage = MessageUtil.linkMessageToXml(linkMessage); 
 } 
 //语音消息 
 else if(msgType.equals(MessageUtil.MESSSAGE_TYPE_VOICE)){ 
 VoiceMessage voiceMessage=new VoiceMessage(); 
 voiceMessage.setToUserName(fromUserName); 
 voiceMessage.setFromUserName(toUserName); 
 voiceMessage.setCreateTime(new Date().getTime()); 
 voiceMessage.setMsgType(MessageUtil.MESSSAGE_TYPE_VOICE); 
 voiceMessage.setMediaId(requestMap.get("MediaId")); 
 voiceMessage.setFormat(requestMap.get("Format")); 
 respMessage = MessageUtil.voiceMessageToXml(voiceMessage); 
 } 
 //事件推送 
 else if(msgType.equals(MessageUtil.MESSSAGE_TYPE_EVENT)){ 
 //事件类型 
 String eventType = requestMap.get("Event"); 
 //订阅 
 if(eventType.equals(MessageUtil.EVENT_TYPE_SUBSCRIBE)){ 
  respContent = "谢谢关注！"; 
 } 
 //取消订阅 
 else if(eventType.equals(MessageUtil.EVENT_TYPE_UNSUBSCRIBE)){ 
  // 
  System.out.println("取消订阅"); 
  
 } 
 else if(eventType.equals(MessageUtil.EVENT_TYPE_CLICK)){ 
  //自定义菜单消息处理 
  System.out.println("自定义菜单消息处理"); 
 } 
 } 
 
 } catch (Exception e) { 
 // TODO Auto-generated catch block 
 e.printStackTrace(); 
 } 
 return respMessage; 
 } 
 
 public static String getMainMenu() 
 { 
 StringBuffer buffer =new StringBuffer(); 
 buffer.append("您好，我是jon,请回复数字选择服务:").append("\n"); 
 buffer.append("1、我的博客").append("\n"); 
 buffer.append("2、 歌曲点播").append("\n"); 
 buffer.append("3、 经典游戏").append("\n"); 
 buffer.append("4 、聊天打牌").append("\n\n"); 
 buffer.append("回复"+"0"+"显示帮助菜单"); 
 return buffer.toString(); 
 
 } 
} 

package cn.jon.wechat.utils; 
 
import java.io.InputStream; 
import java.io.Writer; 
import java.util.HashMap; 
import java.util.List; 
import java.util.Map; 
 
import javax.servlet.http.HttpServletRequest; 
 
import org.dom4j.Document; 
import org.dom4j.Element; 
import org.dom4j.io.SAXReader; 
 
import cn.jon.wechat.message.req.ImageMessage; 
import cn.jon.wechat.message.req.LinkMessage; 
import cn.jon.wechat.message.req.LocationMessage; 
import cn.jon.wechat.message.req.VideoMessage; 
import cn.jon.wechat.message.req.VoiceMessage; 
import cn.jon.wechat.message.resp.Article; 
import cn.jon.wechat.message.resp.MusicMessage; 
import cn.jon.wechat.message.resp.NewsMessage; 
import cn.jon.wechat.message.resp.TextMessage; 
 
import com.thoughtworks.xstream.XStream; 
import com.thoughtworks.xstream.core.util.QuickWriter; 
import com.thoughtworks.xstream.io.HierarchicalStreamWriter; 
import com.thoughtworks.xstream.io.xml.PrettyPrintWriter; 
import com.thoughtworks.xstream.io.xml.XppDriver; 
 
/** 
 * 各种消息的处理类 
 * @author jon 
 */ 
 
public class MessageUtil { 
 /** 
 * 文本类型 
 */ 
 public static final String MESSSAGE_TYPE_TEXT = "text"; 
 /** 
 * 音乐类型 
 */ 
 public static final String MESSSAGE_TYPE_MUSIC = "music"; 
 /** 
 * 图文类型 
 */ 
 public static final String MESSSAGE_TYPE_NEWS = "news"; 
 
 /** 
 * 视频类型 
 */ 
 public static final String MESSSAGE_TYPE_VIDEO = "video"; 
 /** 
 * 图片类型 
 */ 
 public static final String MESSSAGE_TYPE_IMAGE = "image"; 
 /** 
 * 链接类型 
 */ 
 public static final String MESSSAGE_TYPE_LINK = "link"; 
 /** 
 * 地理位置类型 
 */ 
 public static final String MESSSAGE_TYPE_LOCATION = "location"; 
 /** 
 * 音频类型 
 */ 
 public static final String MESSSAGE_TYPE_VOICE = "voice"; 
 /** 
 * 推送类型 
 */ 
 public static final String MESSSAGE_TYPE_EVENT = "event"; 
 /** 
 * 事件类型：subscribe（订阅） 
 */ 
 public static final String EVENT_TYPE_SUBSCRIBE = "subscribe"; 
 /** 
 * 事件类型：unsubscribe（取消订阅） 
 */ 
 public static final String EVENT_TYPE_UNSUBSCRIBE = "unsubscribe"; 
 /** 
 * 事件类型：click（自定义菜单点击事件） 
 */ 
 public static final String EVENT_TYPE_CLICK= "CLICK"; 
 
 /** 
 * 解析微信发来的请求 XML 
 */ 
 @SuppressWarnings("unchecked") 
 public static Map<String,String> pareXml(HttpServletRequest request) throws Exception { 
 
 //将解析的结果存储在HashMap中 
 Map<String,String> reqMap = new HashMap<String, String>(); 
 
 //从request中取得输入流 
 InputStream inputStream = request.getInputStream(); 
 //读取输入流 
 SAXReader reader = new SAXReader(); 
 Document document = reader.read(inputStream); 
 //得到xml根元素 
 Element root = document.getRootElement(); 
 //得到根元素的所有子节点 
 List<Element> elementList = root.elements(); 
 //遍历所有的子节点取得信息类容 
 for(Element elem:elementList){ 
 reqMap.put(elem.getName(),elem.getText()); 
 } 
 //释放资源 
 inputStream.close(); 
 inputStream = null; 
 
 return reqMap; 
 } 
 /** 
 * 响应消息转换成xml返回 
 * 文本对象转换成xml 
 */ 
 public static String textMessageToXml(TextMessage textMessage) { 
 xstream.alias("xml", textMessage.getClass()); 
 return xstream.toXML(textMessage); 
 } 
 /** 
 * 语音对象的转换成xml 
 * 
 */ 
 public static String voiceMessageToXml(VoiceMessage voiceMessage) { 
 xstream.alias("xml", voiceMessage.getClass()); 
 return xstream.toXML(voiceMessage); 
 } 
 
 /** 
 * 视频对象的转换成xml 
 * 
 */ 
 public static String videoMessageToXml(VideoMessage videoMessage) { 
 xstream.alias("xml", videoMessage.getClass()); 
 return xstream.toXML(videoMessage); 
 } 
 
 /** 
 * 音乐对象的转换成xml 
 * 
 */ 
 public static String musicMessageToXml(MusicMessage musicMessage) { 
 xstream.alias("xml", musicMessage.getClass()); 
 return xstream.toXML(musicMessage); 
 } 
 /** 
 * 图文对象转换成xml 
 * 
 */ 
 public static String newsMessageToXml(NewsMessage newsMessage) { 
 xstream.alias("xml", newsMessage.getClass()); 
 xstream.alias("item", new Article().getClass()); 
 return xstream.toXML(newsMessage); 
 } 
 
 /** 
 * 图片对象转换成xml 
 * 
 */ 
 
 public static String imageMessageToXml(ImageMessage imageMessage) 
 { 
 xstream.alias("xml",imageMessage.getClass()); 
 return xstream.toXML(imageMessage); 
 
 } 
 
 /** 
 * 链接对象转换成xml 
 * 
 */ 
 
 public static String linkMessageToXml(LinkMessage linkMessage) 
 { 
 xstream.alias("xml",linkMessage.getClass()); 
 return xstream.toXML(linkMessage); 
 
 } 
 
 /** 
 * 地理位置对象转换成xml 
 * 
 */ 
 
 public static String locationMessageToXml(LocationMessage locationMessage) 
 { 
 xstream.alias("xml",locationMessage.getClass()); 
 return xstream.toXML(locationMessage); 
 
 } 
 
 /** 
 * 拓展xstream，使得支持CDATA块 
 * 
 */ 
 private static XStream xstream = new XStream(new XppDriver(){ 
 public HierarchicalStreamWriter createWriter(Writer out){ 
 return new PrettyPrintWriter(out){ 
 //对所有的xml节点的转换都增加CDATA标记 
 boolean cdata = true; 
  
 @SuppressWarnings("unchecked") 
 public void startNode(String name,Class clazz){ 
  super.startNode(name,clazz); 
 } 
  
 protected void writeText(QuickWriter writer,String text){ 
  if(cdata){ 
  writer.write("<![CDATA["); 
  writer.write(text); 
  writer.write("]]>"); 
  }else{ 
  writer.write(text); 
  } 
 } 
 }; 
 } 
 }); 
 
} 

package cn.jon.wechat.message.req; 
/** 
 * 消息基类 （普通用户-公众号） 
 * @author jon 
 */ 
public class BaseMessage { 
 
 //开发者微信号 
 private String ToUserName; 
 //发送方账号（一个openId） 
 private String FromUserName; 
 //消息创建时间（整型） 
 private long CreateTime; 
 //消息类型（text/image/location/link...） 
 private String MsgType; 
 //消息id 64位整型 
 private String MsgId; 
 
 public BaseMessage() { 
 super(); 
 // TODO Auto-generated constructor stub 
 } 
 
 public BaseMessage(String toUserName, String fromUserName, long createTime, 
 String msgType, String msgId) { 
 super(); 
 ToUserName = toUserName; 
 FromUserName = fromUserName; 
 CreateTime = createTime; 
 MsgType = msgType; 
 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 long getCreateTime() { 
 return CreateTime; 
 } 
 
 public void setCreateTime(long createTime) { 
 CreateTime = createTime; 
 } 
 public String getMsgType() { 
 return MsgType; 
 } 
 
 public void setMsgType(String msgType) { 
 MsgType = msgType; 
 } 
 public String getMsgId() { 
 return MsgId; 
 } 
 
 public void setMsgId(String msgId) { 
 MsgId = msgId; 
 } 
} 

package cn.jon.wechat.message.req; 
/** 
 * 文本消息 
 * @author jon 
 */ 
public class TextMessage extends BaseMessage{ 
 //消息内容 
 private String content; 
 
 public String getContent() { 
 return content; 
 } 
 
 public void setContent(String content) { 
 this.content = content; 
 } 
 
} 

package cn.jon.wechat.message.req; 
/** 
 * 图片消息 
 * @author jon 
 */ 
public class ImageMessage extends BaseMessage{ 
 //图片链接 
 private String PicUrl; 
 
 public String getPicUrl() { 
 return PicUrl; 
 } 
 
 public void setPicUrl(String picUrl) { 
 PicUrl = picUrl; 
 } 
} 

package cn.jon.wechat.message.req; 
 
public class VideoMessage extends BaseMessage { 
 
 private String mediaId; 
 private String thumbMediaId; 
 public String getMediaId() { 
 return mediaId; 
 } 
 public void setMediaId(String mediaId) { 
 this.mediaId = mediaId; 
 } 
 public String getThumbMediaId() { 
 return thumbMediaId; 
 } 
 public void setThumbMediaId(String thumbMediaId) { 
 this.thumbMediaId = thumbMediaId; 
 } 
 
}