初识Java微信公众号开发 项目结构及全部代码

项目结构：

 

/Weixin/src/com/imooc/po/TextMessage.java

package com.imooc.po;

public class TextMessage {

	private String ToUserName;
	private String FromUserName;
	private String CreateTime;
	private String MsgType;
	private String Content;
	private String 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;
	}
	public String getContent() {
		return Content;
	}
	public void setContent(String content) {
		Content = content;
	}
	public String getMsgId() {
		return MsgId;
	}
	public void setMsgId(String msgId) {
		MsgId = msgId;
	}
	
	
}

 

/Weixin/src/com/imooc/servlet/WeixinServlet.java

package com.imooc.servlet;

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 org.dom4j.DocumentException;

import com.imooc.po.TextMessage;
import com.imooc.util.CheckUtil;
import com.imooc.util.MessageUtil;

public class WeixinServlet extends HttpServlet {

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		String signature = req.getParameter("signature");
		String timestamp = req.getParameter("timestamp");
		String nonce = req.getParameter("nonce");
		String echostr = req.getParameter("echostr"); //随机字符串
		
		PrintWriter out = resp.getWriter();
		if(CheckUtil.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 map = MessageUtil.xmlToMap(req);
			
			String fromUserName = map.get("FromUserName");
			String toUserName = map.get("ToUserName");
			String msgType = map.get("MsgType");
			String content = map.get("Content");
			
			String message = null;
			if(MessageUtil.MESSAGE_TEXT.equals(msgType)){
				
				if("1".equals(content)){
					message = MessageUtil.initText(toUserName, fromUserName, MessageUtil.firstMenu());
				}else if("2".equals(content)){
					message = MessageUtil.initText(toUserName, fromUserName, MessageUtil.secondMenu());
				}else if("?".equals(content) || "？".equals(content)){
					message = MessageUtil.initText(toUserName, fromUserName, MessageUtil.menuText());
				}else{
					message = MessageUtil.initText(toUserName, fromUserName, MessageUtil.doubushi());
				}
				
				
				
				System.out.println(message);
			}else if(MessageUtil.MESSAGE_EVENT.equals(msgType)){
				String eventType = map.get("Event");
				if(MessageUtil.MESSAGE_SUBSCRIBE.equals(eventType)){
					message = MessageUtil.initText(toUserName, fromUserName, MessageUtil.menuText());
				}
			}
			
			
			out.print(message);
		} catch (DocumentException e) {
			e.printStackTrace();
		}finally{
			out.close();
		}
		
		
		
	}
	
}

 

/Weixin/src/com/imooc/util/CheckUtil.java

package com.imooc.util;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;

public class CheckUtil {

	private static final String token = "imooc";
	public static boolean checkSignature(String signature,String timestamp,String nonce){
		
		String[] arr = new String[]{token,timestamp,nonce};
		
		//排序
		Arrays.sort(arr);
		
		//生成字符串
		StringBuffer content = new StringBuffer();
		for(int i=0;i < arr.length; i++){
			content.append(arr[i]);
		}
		
		// sha1加密
		String temp = getSha1(content.toString());
		
		return temp.equals(signature);
		
	}
	
	public static String getSha1(String str){
		if(str == null || str.length() == 0){
			return null;
		}
		
		char hexDigits[] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
		
		try {
			MessageDigest mdTemp = MessageDigest.getInstance("SHA1");

			mdTemp.update(str.getBytes("UTF-8"));
			
			byte[] md = mdTemp.digest();
			int j = md.length;
			char buf[] = new char[j*2];
			int k = 0;
			for(int i=0;i>> 4 & 0xf];
				buf[k++] = hexDigits[byte0  & 0xf];
			}
			return new String(buf);
		}catch(Exception e){
			return null;
		}
	}
}

 

/Weixin/src/com/imooc/util/MessageUtil.java

package com.imooc.util;


import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;


import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import com.imooc.po.TextMessage;
import com.thoughtworks.xstream.XStream;

public class MessageUtil {
	
	public static final String MESSAGE_TEXT = "text";
	public static final String MESSAGE_IMAGE = "image";
	public static final String MESSAGE_VOICE = "voice";
	public static final String MESSAGE_VIDEO = "video";
	public static final String MESSAGE_LINK = "link";
	public static final String MESSAGE_LOCATION = "location";
	public static final String MESSAGE_EVENT = "event";
	public static final String MESSAGE_SUBSCRIBE = "subscribe";
	public static final String MESSAGE_UNSUBSCRIBE = "unsubscribe";
	public static final String MESSAGE_CLICK = "CLICK";
	public static final String MESSAGE_VIEW = "VIEW";
	
	/**
	 * xml 转 map
	 * @param request
	 * @return
	 * @throws IOException
	 * @throws DocumentException
	 */
	public static Map xmlToMap(HttpServletRequest request) throws IOException, DocumentException{
		Map map = new HashMap();
		SAXReader reader = new SAXReader();
		
		//从 request中获取输入流
		InputStream ins = request.getInputStream();
		Document doc = reader.read(ins);
		
		Element root = doc.getRootElement();
		
		List list = root.elements();
		
		for(Element e:list){
			map.put(e.getName(), e.getText());
		}
		ins.close();
		return map;
	}


	public static String textMessageToXml(TextMessage textMessage){
		XStream xstream = new XStream();
		xstream.alias("xml", textMessage.getClass());
		return xstream.toXML(textMessage);
	}
	
	public static String initText(String toUserName,String fromUserName,String content){
		TextMessage text = new TextMessage();
		text.setFromUserName(toUserName);
		text.setToUserName(fromUserName);
		text.setMsgType(MessageUtil.MESSAGE_TEXT);
		text.setCreateTime(String.valueOf(new Date().getTime()));
		text.setContent(content);
		return textMessageToXml(text);
	}
	
	
	/**
	 * 主菜单
	 * @return
	 */
	public static String menuText(){
		StringBuffer sb = new StringBuffer();
		sb.append("欢迎你的关注，请按照菜单提示进行操作：\n\n");
		sb.append("1.课程介绍\n");
		sb.append("2. 慕课网介绍\n");
		sb.append("回复 ？ 调出 此菜单...");
		return sb.toString();
	}
	
	public static String firstMenu(){
		StringBuffer sb = new StringBuffer();
		sb.append("介绍微信公众号开发");
		
		return sb.toString();
	}
	
	public static String secondMenu(){
		StringBuffer sb = new StringBuffer();
		sb.append("222222222");
		
		return sb.toString();
	}

	public static String doubushi(){
		StringBuffer sb = new StringBuffer();
		sb.append("哈哈，都不是");
		
		return sb.toString();
	}
}

 

/Weixin/WebContent/WEB-INF/web.xml

  Weixin
  
  
  	weixinServlet
  	com.imooc.servlet.WeixinServlet
  
  
  
  	weixinServlet
  	/wx.do
  
  
  
    index.html
    index.htm
    index.jsp
    default.html
    default.htm
    default.jsp