weichat 微信开发之接受普通消息

接入微信使用 ngrok

http://knight-black-bob.iteye.com/blog/2244830

接受普通消息

源码下载： http://download.csdn.net/download/knight_black_bob/9123671

WeichatServlet.java

package com.curiousby.cn;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.curiousby.cn.entity.TextMessage;
import com.curiousby.cn.util.CommonUtils;
import com.curiousby.cn.util.MessageUtil;
import com.curiousby.cn.util.WeichatCheckUtils;
 

/**
 * @author baoyou  E-mail:[email protected]
 * @version 创建时间：2015年9月20日 下午2:06:42 
 * des:
 */
public class WeichatServlet extends HttpServlet{

	 
	private static final long serialVersionUID = 1L;
	private String signature; //微信加密签名，signature结合了开发者填写的token参数和请求中的timestamp参数、nonce参数。
	private String timestamp; // 时间戳
	private String nonce; //随机数
	private String echostr; //随机字符串
	
	

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException { 
		signature = req.getParameter("signature");
		timestamp = req.getParameter("timestamp");
		nonce = req.getParameter("nonce");
		echostr = req.getParameter("echostr");
		System.out.println("signature timestamp  nonce  echostr  " + signature +" " + timestamp +" " + nonce  + " " + echostr ); 
		PrintWriter out = resp.getWriter();
        if (WeichatCheckUtils.checkSignature(signature, timestamp, nonce)) {
            out.print(echostr);
        }

	}
	 
	
	
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		req.setCharacterEncoding("UTF-8");
		resp.setCharacterEncoding("UTF-8");
		PrintWriter out = resp.getWriter();
		try {
			Map<String,String> map = MessageUtil.xmlToString(req);
			System.out.println(CommonUtils.mapToString(map));
			  String toUserName   = map .get("ToUserName");
			  String fromUserName   = map .get("FromUserName");
			  String createTime  = map .get("CreateTime");
			  String msgType  = map .get("MsgType");
			  String content  = map .get("Content");
			  String msgId  = map .get("MsgId"); 
			
			  String message ="";
			 
			  if ("text".equals(msgType)) {
				  TextMessage text = new TextMessage();
				  text.setFromUserName(toUserName);
				  text.setToUserName(fromUserName);
				  text.setMsgType("text");
				  text.setCreateTime(new Date().getTime());
				  String recontent ="";
				  try{
				  int aint =  Integer.parseInt(content);
				  recontent=" 您好，我是包包大人.\r\n 您发送的内容是 :"+(aint+1);
				  }catch(Exception e){
					  recontent =" 您好，我是包包大人.\r\n 您发送的内容是 :"+content;
				  }
				  text.setContent(recontent);
				  message =  MessageUtil.textMessageToXml(text);
			  }
			   System.out.println(message);
			  out.print(message);
		} catch (Exception e) { 
			e.printStackTrace();
		}finally{
			out.close();
		}
		
		
	}
}

CommonUtils.java

package com.curiousby.cn.util;

import java.util.Map;

/**
 * @author baoyou  E-mail:[email protected]
 * @version 创建时间：2015年9月20日 下午2:24:27 
 * des:
 */
public class CommonUtils {

	public static String arrayToString (String [] arr){
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < arr.length; i++) {
			sb.append(arr[i]);
		}
		return sb.toString();
	}
	
	public static String mapToString(Map<String,String> map){
		StringBuffer sb = new StringBuffer();
		sb.append("{");
		for (String key : map.keySet() ) {
			sb.append(key+":"+map.get(key)+",");
		}
		sb.substring(0, sb.length()-1);
		sb.append("}");
		return sb.toString();
	}
	
	
}

MessageUtil.java

package com.curiousby.cn.util;

import java.io.InputStream;
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 com.curiousby.cn.entity.TextMessage;
import com.thoughtworks.xstream.XStream;
 

/**
 * @author baoyou  E-mail:[email protected]
 * @version 创建时间：2015年9月20日 下午4:18:35 
 * des:
 */
public class MessageUtil {

	
	public  static Map <String,String> xmlToString(HttpServletRequest request) throws Exception{
		 Map <String,String>  map = new HashMap<String,String>();
		 SAXReader reader = new SAXReader();
		 InputStream is = request.getInputStream();
		 Document doc = reader.read(is);
		 Element root = doc.getRootElement();
		 List<Element> llist = root.elements();
		 for (Element e : llist) {
			map.put(e.getName(), e.getText());
		}
		 is.close();
		return map;
	}
	
	public static String textMessageToXml(TextMessage textMessage){
		
		XStream xStream = new XStream();
		xStream.alias("xml", textMessage.getClass());
		return xStream.toXML(textMessage);
	}
	
}

ShaUtils.java

package com.curiousby.cn.util;

import java.security.MessageDigest;

/**
 * @author baoyou  E-mail:[email protected]
 * @version 创建时间：2015年9月20日 下午2:36:04 
 * des:
 */
public class ShaUtils {

	private static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5',
		'6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
	
	
	public static String getSha1(String str){
		if (str == null || str.length() ==0) {
			return null;
		}
		
		try{
			
			MessageDigest messageDigest = MessageDigest.getInstance("SHA1");
			messageDigest.update(str.getBytes("UTF-8"));
			
			byte[] md = messageDigest.digest(); 
			int j  = md.length;
			char [] buf  = new char[j*2];
			int k = 0;
			
			for (int i = 0; i < j; i++) {
				byte byte0 = md[i];
				buf[k++] =HEX_DIGITS[byte0 >>> 4 & 0xf ];
				buf[k++] =HEX_DIGITS[byte0  & 0xf ];
			}
			System.out.println(" before sha1 str :"+ str +"\r\n after sha1  string : "+new String(buf));
			return new String(buf);
		}catch(Exception e){
			return null;
		}
	}
}

WeichatCheckUtils.java

package com.curiousby.cn.util;

import java.util.Arrays;

/**
 * @author baoyou  E-mail:[email protected]
 * @version 创建时间：2015年9月20日 下午2:14:46 
 * des:
 */
public class WeichatCheckUtils {

	
	private static final String TOKEN ="xxxxxx";
	
	public  static boolean checkSignature(String signature, String timestamp,String nonce){
		String[] str = { TOKEN, timestamp, nonce };
		 Arrays.sort(str); // 字典序排序
		String string = CommonUtils.arrayToString(str);
		String temp = ShaUtils.getSha1(string);
		 return temp.equals(signature);
	}
	
}

web.xml

<servlet>
  	<servlet-name>weichatServlet</servlet-name>
  	<servlet-class>com.curiousby.cn.WeichatServlet</servlet-class>
  </servlet>
  <servlet-mapping>
  	<servlet-name>weichatServlet</servlet-name> 
  	<url-pattern>/weichat.do</url-pattern>
  </servlet-mapping>

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weichat 微信开发之接受普通消息

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