初識Java微信公眾號開發 專案結構及全部程式碼
阿新 • • 發佈：2019-02-07
專案結構：
/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"); //隨機字串 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<String,String> 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<j;i++){ byte byte0 = md[i]; buf[k++] = hexDigits[byte0 >>> 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 轉 map
* @param request
* @return
* @throws IOException
* @throws DocumentException
*/
public static Map<String,String> xmlToMap(HttpServletRequest request) throws IOException, DocumentException{
Map<String,String> map = new HashMap<String,String>();
SAXReader reader = new SAXReader();
//從 request中獲取輸入流
InputStream ins = request.getInputStream();
Document doc = reader.read(ins);
Element root = doc.getRootElement();
List<Element> 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);
}
/**
* 主選單
* @return
*/
public static String menuText(){
StringBuffer sb = new StringBuffer();
sb.append("歡迎你的關注，請按照選單提示進行操作：\n\n");
sb.append("1.課程介紹\n");
sb.append("2. 慕課網介紹\n");
sb.append("回覆 ？ 調出 此選單...");
return sb.toString();
}
public static String firstMenu(){
StringBuffer sb = new StringBuffer();
sb.append("介紹微信公眾號開發");
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
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>Weixin</display-name>
<servlet>
<servlet-name>weixinServlet</servlet-name>
<servlet-class>com.imooc.servlet.WeixinServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>weixinServlet</servlet-name>
<url-pattern>/wx.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>