慕课网图文消息

微信官网的开发者文档

发送消息-被动回复消息

可以了，按2回复图文消息

下面贴一下代码吧

WX_Interface.java

package net.wxinterface;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.security.MessageDigest;
import java.util.Arrays;
import java.util.Date;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
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.MessageUtil;
public class WX_Interface extends HttpServlet {

/**
* Constructor of the object.
*/
public WX_Interface() {
super();
}

/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}

/**
* 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 {
//微信加密签名,signature结合了开发者填写的tocken参数和请求中的timestamp参数、nonce参数。
String signature = request.getParameter("signature");
//时间戳
String timestamp = request.getParameter("timestamp");
//随机数
String nonce = request.getParameter("nonce");

String echostr = request.getParameter("echostr");

String tocken = "test";
try{
if(null != signature){
String[] ArrTmp = {tocken,timestamp,nonce};
Arrays.sort(ArrTmp);
StringBuffer sb = new StringBuffer();
for(int i=0;i<ArrTmp.length;i++){
sb.append(ArrTmp[i]);
}
MessageDigest md = MessageDigest.getInstance("SHA-1");
byte[] bytes = md.digest(new String(sb).getBytes());
StringBuffer buf = new StringBuffer();
for(int i=0;i<bytes.length;i++){
if(((int)bytes[i] & 0xff)<0x10){
buf.append("0");
}
buf.append(Long.toString((int) bytes[i] & 0xff,16));

}
if(signature.equals(buf.toString())){
response.getOutputStream().println(echostr);
}
}
}catch(Exception e){
e.printStackTrace();
}

System.out.println("test0");

System.out.println("doGet");
System.out.println("signature "+signature);
System.out.println("timstamp "+timestamp);
System.out.println("nonce "+nonce);
System.out.println("echostr "+echostr);

System.out.println("doGet");

}

/**
* 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 {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
try {
Map<String,String> map = MessageUtil.xmlToMap(request);
String fromUserName = map.get("FromUserName");
String toUserName = map.get("ToUserName");
String msgType = map.get("MsgType");
String content = map.get("Content");//
String message = null;

//if("text".equals(msgType)){
if(MessageUtil.MESSAGE_TEXT.equals(msgType)){
if("1".equals(content)){
message = MessageUtil.initText(toUserName,fromUserName,MessageUtil.firstMenu());
}else if("3".equals(content)){
message = MessageUtil.initText(toUserName,fromUserName,content);
}else if("2".equals(content)){
//message = MessageUtil.initText(toUserName,fromUserName,MessageUtil.secondMenu());
message = MessageUtil.initNewsMessage(toUserName,fromUserName);//用户按2返回图文消息
//整个的图文消息的创建以及回复已经写完了
}else if("?".equals(content)||" ? ".equals(content)){
message = MessageUtil.initText(toUserName,fromUserName,MessageUtil.menuText());
}
/* TextMessage text = new TextMessage();
text.setFromUserName(toUserName);//谁发给你,您就发给谁
text.setToUserName(fromUserName);
text.setMsgType("text");
text.setCreateTime(new Date().getTime());
text.setContent("您发送的消息是:"+content);
message = MessageUtil.textMessageToXml(text);

System.out.println(message);*/
}else if(MessageUtil.MESSAGE_EVENT.equals(msgType)){//添加消息推送的逻辑
String eventType = map.get("Event");
if(MessageUtil.MESSAGE_SUBSCRIBE.equals(eventType)){//消息推送事件的类型
message = MessageUtil.initText(toUserName, fromUserName, content);//关注微信公众号之后微信后台推送
}

}
out .print(message);
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
out.close();
}

System.out.println("doPost");
//response.setContentType("text/html");
//PrintWriter out = response.getWriter();

/* StringBuffer strb = new StringBuffer();
ServletInputStream in = request.getInputStream();
BufferedReader breader= new BufferedReader( new InputStreamReader(in,"UTF-8"));

String str = null;
while(null!=(str=breader.readLine())){
strb.append(str);
}
//out.println(str);
System.out.println(strb);*/
//out.flush();
//out.close();
}

/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}

}

MessageUtil.java

package com.imooc.util;

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

import javax.servlet.http.HttpServletRequest;
import javax.xml.soap.Text;

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

import com.imooc.po.News;
import com.imooc.po.NewsMessage;
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_NEWS = "news";
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转为map集合
* @param ${param} the ${bare_field_name} to set
* @param ${param} the ${bare_field_name} to set
* @param ${param} the ${bare_field_name} to set
* @param ${param} the ${bare_field_name} to set
*/

public static Map<String,String> xmlToMap(HttpServletRequest request) throws DocumentException, IOException{
Map<String,String> map = new HashMap<String,String>();
SAXReader reader = new SAXReader();
InputStream ins = request.getInputStream();//从request中获取输入流
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;

}

/**
* 将文本消息对象转为xml
* @param ${param} the ${bare_field_name} to set
* @param ${param} the ${bare_field_name} to set
* @param ${param} the ${bare_field_name} to set
* @param ${param} the ${bare_field_name} to set
*/

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_EVENT);//这里写错了导致不能提供服务
text.setMsgType(MessageUtil.MESSAGE_TEXT);
text.setCreateTime(new Date().getTime());
text.setContent(content);
return textMessageToXml(text);
}

/**
*
* 主菜单
*
* @return
*/

public static String menuText(){
StringBuffer sb = new StringBuffer();
sb.append("欢迎您的关注,请按照菜单提示进行操作: ");
sb.append("1、课程介绍");
sb.append("2、慕课网介绍 ");
sb.append("回复?调出此菜单。");
return sb.toString();

}

public static String firstMenu(){
StringBuffer sb = new StringBuffer();
sb.append("本套课程介绍微信公众号开发,主要涉及公众号介绍、编辑模式介绍、开发模式介绍等");
return sb.toString();
}

public static String secondMenu(){
StringBuffer sb = new StringBuffer();
sb.append("慕课网是垂直的互联网IT技能免费学习网站。以独家视频教程、在线编程工具、学习计划、问答社区为核心特色。在这里，你可以找到最好的互联网技术牛人，也可以通过免费的在线公开视频课程学习国内领先的互联网IT技术。");
sb.append("慕课网课程涵盖前端开发、PHP、Html5、Android、iOS、Swift等IT前沿技术语言，包括基础课程、实用案例、高级分享三大类型，适合不同阶段的学习人群。以纯干货、短视频的形式为平台特点，为在校学生、职场白领提供了一个迅速提升技能、共同分享进步的学习平台。[1]");
sb.append("4月2日，国内首个IT技能学习类应用——慕课网3.1.0版本在应用宝首发。据了解，在此次上线的版本中，慕课网新增了课程历史记录、相关课程推荐等四大功能，为用户营造更加丰富的移动端IT学习体验");

return sb.toString();
}
/***
* 把图文消息的实例对象转化为XML格式的数据
* 图文消息转为XML
* 图文消息的组装
*
*
*/
public static String initNewsMessage(String toUserName,String fromUserName){
String message = null;
List<News> newsList = new ArrayList<News>();
NewsMessage newsMessage = new NewsMessage();
News news = new News();

// 如果想创建多个图文消息就在这里创建多个News对象并分别赋值最后一并导入集合newsList里面

news.setTitle("慕课网介绍");
news.setDescription("慕课网是垂直的互联网IT技能免费学习网站。以独家视频教程、在线编程工具、学习计划、问答社区为核心特色。在这里，你可以找到最好的互联网技术牛人，也可以通过免费的在线公开视频课程学习国内领先的互联网IT技术。慕课网课程涵盖前端开发、PHP、Html5、Android、iOS、Swift等IT前沿技术语言，包括基础课程、实用案例、高级分享三大类型，适合不同阶段的学习人群。以纯干货、短视频的形式为平台特点，为在校学生、职场白领提供了一个迅速提升技能、共同分享进步的学习平台。[1] 4月2日，国内首个IT技能学习类应用——慕课网3.1.0版本在应用宝首发。据了解，在此次上线的版本中，慕课网新增了课程历史记录、相关课程推荐等四大功能，为用户营造更加丰富的移动端IT学习体验。[2] ");
//news.setPicUrl("wx2017.duapp.com/beifeng/image/imooc.jpg");//服务器中图片的路径

news.setPicUrl("http://wx2017.duapp.com/beifeng/image/imooc.jpg");//服务器中图片的路径注意图片的路径不要忘记加上http 否则图片地址是错误的读取不到图片

news.setUrl("www.imooc.com");//跳转的路径慕课网的官网

newsList.add(news);//这一条图文消息设置完毕之后就把它放置到集合里面
newsMessage.setToUserName(fromUserName);
newsMessage.setFromUserName(toUserName);
newsMessage.setCreateTime(new Date().getTime());//消息创建时间
newsMessage.setMsgType(MESSAGE_NEWS);//消息类型
newsMessage.setArticles(newsList);//设置消息体
newsMessage.setArticleCount(newsList.size());//图文消息的个数图文消息的长度=这个集合的长度
message = newsMessageToXml(newsMessage);//把图文消息实例对象转换为XML数据
return message;
}
public static String newsMessageToXml(NewsMessage newsMessage){
XStream xstream = new XStream();
xstream.alias("xml",newsMessage.getClass());//把图文消息NewsMessage->xml
xstream.alias("item",new News().getClass());//把消息体News -> item
return xstream.toXML(newsMessage);
}
}

News.java

package com.imooc.po;
//图文消息最里层的四个属性
public class News {
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 getPicUrl() {
return PicUrl;
}
public void setPicUrl(String picUrl) {
PicUrl = picUrl;
}
public String getUrl() {
return Url;
}
public void setUrl(String url) {
Url = url;
}
private String Title;//标题
private String Description;//标题图片描述
private String PicUrl;//图片地址
private String Url;//跳转地址

}

NewsMessage.java

package com.imooc.po;
//图文消息的实例对象
import java.util.List;

//图文消息的最外层部分
//NewsMessage图文消息也是一样继承父类BaseMessage
//微信公众后台它只能接收XML格式的数据
public class NewsMessage extends BaseMessage{
private int ArticleCount;//图文消息的数量个数限制在8条以内
private List<News> Articles;//多条图文消息实际上是多条图文消息的消息体
public int getArticleCount() {
return ArticleCount;
}
public void setArticleCount(int articleCount) {
ArticleCount = articleCount;
}
public List<News> getArticles() {
return Articles;
}
public void setArticles(List<News> articles) {
Articles = articles;
}

}

BaseMessage.java

package com.imooc.po;
//重复的东西就放在一个父类里面重复的东西就没有必要重复的编写代码
public class BaseMessage {
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 getToUserName() {
return ToUserName;
}
public void setToUserName(String toUserName) {
ToUserName = toUserName;
}
private String FromUserName;//发送方账号(一个OpenID)
private String ToUserName;//开发者微信号
private long CreateTime;//消息创建时间(整型)
private String MsgType;//消息类型 text
}

修改了Mesageutil.java里面的图文消息类的图片路径之后再测试就成功了