基于springboot+mybatis的微信公众号开发第三篇-消息的接收与回复

1、在写处理消息的方法前,我们得把相关的model类写好。 
在model包下创建message(req与resp),具体创建如图所示: 
这里写图片描述

BaseMessage类

/**
 * 消息基类(普通用户 -> 公众帐号)
 *
 */
public class BaseMessage {
    // 开发者微信号
    private String ToUserName;
    // 发送方帐号(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 long 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 long getMsgId() {
        return MsgId;
    }

    public void setMsgId(long msgId) {
        MsgId = msgId;
    }
}

ImageMessage类

/**
 * 图片消息
 *
 */
public class ImageMessage extends BaseMessage {
    // 图片链接
    private String PicUrl;

    public String getPicUrl() {
        return PicUrl;
    }

    public void setPicUrl(String picUrl) {
        PicUrl = picUrl;
    }
}

LinkMessage类

/**
 * 链接消息
 *
 */
public class LinkMessage extends BaseMessage {
    // 消息标题
    private String Title;
    // 消息描述
    private String Description;
    // 消息链接
    private String Url;

    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 getUrl() {
        return Url;
    }

    public void setUrl(String url) {
        Url = url;
    }
}

LocationMessage类

/**
 * 地理位置消息
 *
 */
public class LocationMessage extends BaseMessage {
    // 地理位置维度
    private String Location_X;
    // 地理位置经度
    private String Location_Y;
    // 地图缩放大小
    private String Scale;
    // 地理位置信息
    private String Label;

    public String getLocation_X() {
        return Location_X;
    }

    public void setLocation_X(String location_X) {
        Location_X = location_X;
    }

    public String getLocation_Y() {
        return Location_Y;
    }

    public void setLocation_Y(String location_Y) {
        Location_Y = location_Y;
    }

    public String getScale() {
        return Scale;
    }

    public void setScale(String scale) {
        Scale = scale;
    }

    public String getLabel() {
        return Label;
    }

    public void setLabel(String label) {
        Label = label;
    }
}

MenuMessage类

public class MenuMessage extends BaseMessage {
    private String EventKey;

    public String getEventKey() {
        return EventKey;
    }

    public void setEventKey(String eventKey) {
        EventKey = eventKey;
    }
}
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TextMessage类

/**
 * 文本消息
 *
 */
public class TextMessage extends BaseMessage {
    // 消息内容
    private String Content;

    public String getContent() {
        return Content;
    }

    public void setContent(String content) {
        Content = content;
    }
}

VoiceMessage类

/**
 * 音频消息
 *
 */
public class VoiceMessage extends BaseMessage {
    // 媒体ID
    private String MediaId;
    // 语音格式
    private String Format;

    public String getMediaId() {
        return MediaId;
    }

    public void setMediaId(String mediaId) {
        MediaId = mediaId;
    }

    public String getFormat() {
        return Format;
    }

    public void setFormat(String format) {
        Format = format;
    }
}

Article类

/**
 * 图文model
 *
 */
public class Article {
    // 图文消息名称
    private String Title;
    // 图文消息描述
    private String Description;
    // 图片链接,支持JPG、PNG格式,较好的效果为大图640*320,小图80*80,限制图片链接的域名需要与开发者填写的基本资料中的Url一致
    private String PicUrl;
    // 点击图文消息跳转链接
    private String Url;

    public String getTitle() {
        return Title;
    }

    public void setTitle(String title) {
        Title = title;
    }

    public String getDescription() {
        return null == Description ? "" : Description;
    }

    public void setDescription(String description) {
        Description = description;
    }

    public String getPicUrl() {
        return null == PicUrl ? "" : PicUrl;
    }

    public void setPicUrl(String picUrl) {
        PicUrl = picUrl;
    }

    public String getUrl() {
        return null == Url ? "" : Url;
    }

    public void setUrl(String url) {
        Url = url;
    }

}

BaseMessage类

/**
 * 消息基类(公众帐号 -> 普通用户)
 *
 */
public class BaseMessage {
    // 接收方帐号(收到的OpenID)
    private String ToUserName;
    // 开发者微信号
    private String FromUserName;
    // 消息创建时间 (整型)
    private long CreateTime;
    // 消息类型(text/music/news)
    private String MsgType;
    // 位0x0001被标志时,星标刚收到的消息
    private int FuncFlag;

    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 int getFuncFlag() {
        return FuncFlag;
    }

    public void setFuncFlag(int funcFlag) {
        FuncFlag = funcFlag;
    }
}

NewsMessage类

/**
 * 文本消息
 *
 */
public class NewsMessage extends BaseMessage {
    // 图文消息个数,限制为10条以内
    private int ArticleCount;
    // 多条图文消息信息,默认第一个item为大图
    private List<Article> Articles;

    public int getArticleCount() {
        return ArticleCount;
    }

    public void setArticleCount(int articleCount) {
        ArticleCount = articleCount;
    }

    public List<Article> getArticles() {
        return Articles;
    }

    public void setArticles(List<Article> articles) {
        Articles = articles;
    }
}
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TextMessage类

/**
 * 文本消息
 *
 */
public class TextMessage extends BaseMessage {
    // 回复的消息内容
    private String Content;

    public String getContent() {
        return Content;
    }

    public void setContent(String content) {
        Content = content;
    }
}

2、model类创建好了之后,在util包中建立一个MessageUtil类来解析和响应消息。 
a、接收消息时是xml,所以需要解析,这里我们借助于开源框架dom4j去解析xml(这里使用的是dom4j-1.6.1.jar) 
b、而响应消息要把java类转换成xml,这里我们将采用开源框架xstream来实现两者的转换(这里使用的是xstream-1.3.1.jar)

package com.util;

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 com.model.message.response.Article;
import com.model.message.response.NewsMessage;
import com.model.message.response.TextMessage;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

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;

/**
 * 消息工具类
 *
 */
public class MessageUtil {

    /**
     * 返回消息类型:文本
     */
    public static final String RESP_MESSAGE_TYPE_TEXT = "text";

    /**
     * 返回消息类型:音乐
     */
    public static final String RESP_MESSAGE_TYPE_MUSIC = "music";

    /**
     * 返回消息类型:图文
     */
    public static final String RESP_MESSAGE_TYPE_NEWS = "news";

    /**
     * 请求消息类型:文本
     */
    public static final String REQ_MESSAGE_TYPE_TEXT = "text";

    /**
     * 请求消息类型:图片
     */
    public static final String REQ_MESSAGE_TYPE_IMAGE = "image";

    /**
     * 请求消息类型:链接
     */
    public static final String REQ_MESSAGE_TYPE_LINK = "link";

    /**
     * 请求消息类型:地理位置
     */
    public static final String REQ_MESSAGE_TYPE_LOCATION = "location";

    /**
     * 请求消息类型:音频
     */
    public static final String REQ_MESSAGE_TYPE_VOICE = "voice";

    /**
     * 请求消息类型:推送
     */
    public static final String REQ_MESSAGE_TYPE_EVENT = "event";

    /**
     * 事件类型:subscribe(订阅)and 未关注群体扫描二维码
     */
    public static final String EVENT_TYPE_SUBSCRIBE = "subscribe";

    /**
     * 事件类型:已关注群体扫描二维码
     */
    public static final String EVENT_TYPE_SCAN="SCAN";
    /**
     * 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";
    /**
     * 事件类型:VIEW(点击自定义菜单跳转链接时的事件)
     */
    public static final String EVENT_TYPE_VIEW = "VIEW";

    /**
     * 事件类型:transfer_customer_service(把消息推送给客服)
     */
    public static final String EVENT_TYPE_TRANSFER_CUSTOMER_SERVICE = "transfer_customer_service";


    /**
     * 解析微信发来的请求(XML)
     *
     * @param request
     * @return
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    //屏蔽某些编译时的警告信息(在强制类型转换的时候编译器会给出警告)
    public static Map<String, String> parseXml(HttpServletRequest request) throws Exception {
        // 将解析结果存储在HashMap中
        Map<String, String> map = 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();

        // 遍历所有子节点
        for (Element e : elementList)
            map.put(e.getName(), e.getText());

        // 释放资源
        inputStream.close();
        inputStream = null;

        return map;
    }

    /**
     * 文本消息对象转换成xml
     *
     * @param textMessage 文本消息对象
     * @return xml
     */
    public static String textMessageToXml(TextMessage textMessage) {
        xstream.alias("xml", textMessage.getClass());
        return xstream.toXML(textMessage);
    }


    /**
     * 图文消息对象转换成xml
     *
     * @param newsMessage 图文消息对象
     * @return xml
     */
    public static String newsMessageToXml(NewsMessage newsMessage) {
        xstream.alias("xml", newsMessage.getClass());
        xstream.alias("item", new Article().getClass());
        return xstream.toXML(newsMessage);
    }

    /**
     * 扩展xstream,使其支持CDATA块
     *
     * @date 2013-05-19
     */
    private static XStream xstream = new XStream(new XppDriver() {
        public HierarchicalStreamWriter createWriter(Writer out) {
            return new PrettyPrintWriter(out) {
                // 对所有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);
                    }
                }
            };
        }
    });
}

3、在CoreServiceImpl.java中完善processRequest的逻辑

注: 
这里加入了默认回复消息,qq怀旧表情回复(最新的无法识别),单、多图文回复等等。

package com.service.core;

import com.model.message.response.Article;
import com.model.message.response.NewsMessage;
import com.model.message.response.TextMessage;
import com.util.MessageUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 核心服务类
 */
@Service("coreService")
public class CoreServiceImpl implements CoreService {

    private static Logger log = LoggerFactory.getLogger(CoreServiceImpl.class);

    /**
     * 处理微信发来的请求(包括事件的推送)
     *
     * @param request
     * @return
     */
    public  String processRequest(HttpServletRequest request) {

        String respMessage = null;
        try {
            // 默认返回的文本消息内容
            String respContent = "请求处理异常,请稍候尝试!";
            // xml请求解析
            Map<String, String> requestMap = MessageUtil.parseXml(request);
            // 发送方帐号(open_id)
            String fromUserName = requestMap.get("FromUserName");
            // 公众帐号
            String toUserName = requestMap.get("ToUserName");
            // 消息类型
            String msgType = requestMap.get("MsgType");
            // 回复文本消息
            TextMessage textMessage = new TextMessage();
            textMessage.setToUserName(fromUserName);
            textMessage.setFromUserName(toUserName);
            textMessage.setCreateTime(new Date().getTime());
            textMessage.setMsgType(MessageUtil.RESP_MESSAGE_TYPE_TEXT);
            textMessage.setFuncFlag(0);


            // 创建图文消息
            NewsMessage newsMessage = new NewsMessage();
            newsMessage.setToUserName(fromUserName);
            newsMessage.setFromUserName(toUserName);
            newsMessage.setCreateTime(new Date().getTime());
            newsMessage.setMsgType(MessageUtil.RESP_MESSAGE_TYPE_NEWS);
            newsMessage.setFuncFlag(0);

            List<Article> articleList = new ArrayList<Article>();
            // 接收文本消息内容
            String content = requestMap.get("Content");
            // 自动回复文本消息
            if (msgType.equals(MessageUtil.REQ_MESSAGE_TYPE_TEXT)) {

                //如果用户发送表情,则回复同样表情。
                if (isQqFace(content)) {
                    respContent = content;
                    textMessage.setContent(respContent);
                    // 将文本消息对象转换成xml字符串
                    respMessage = MessageUtil.textMessageToXml(textMessage);
                } else {
                    //回复固定消息
                    switch (content) {

                        case "1": {
                            StringBuffer buffer = new StringBuffer();
                            buffer.append("您好,我是小8,请回复数字选择服务:").append("\n\n");
                            buffer.append("11 可查看测试单图文").append("\n");
                            buffer.append("12  可测试多图文发送").append("\n");
                            buffer.append("13  可测试网址").append("\n");

                            buffer.append("或者您可以尝试发送表情").append("\n\n");
                            buffer.append("回复“1”显示此帮助菜单").append("\n");
                            respContent = String.valueOf(buffer);
                            textMessage.setContent(respContent);
                            respMessage = MessageUtil.textMessageToXml(textMessage);
                            break;
                        }
                        case "11": {
                            //测试单图文回复
                            Article article = new Article();
                            article.setTitle("微信公众帐号开发教程Java版");
                            // 图文消息中可以使用QQ表情、符号表情
                            article.setDescription("这是测试有没有换行\n\n如果有空行就代表换行成功\n\n点击图文可以跳转到百度首页");
                            // 将图片置为空
                            article.setPicUrl("http://www.sinaimg.cn/dy/slidenews/31_img/2016_38/28380_733695_698372.jpg");
                            article.setUrl("http://www.baidu.com");
                            articleList.add(article);
                            newsMessage.setArticleCount(articleList.size());
                            newsMessage.setArticles(articleList);
                            respMessage = MessageUtil.newsMessageToXml(newsMessage);
                            break;
                        }
                        case "12": {
                            //多图文发送
                            Article article1 = new Article();
                            article1.setTitle("紧急通知,不要捡这种钱!湛江都已经传疯了!\n");
                            article1.setDescription("");
                            article1.setPicUrl("http://www.sinaimg.cn/dy/slidenews/31_img/2016_38/28380_733695_698372.jpg");
                            article1.setUrl("http://mp.weixin.qq.com/s?__biz=MjM5Njc2OTI4NQ==&mid=2650924309&idx=1&sn=8bb6ae54d6396c1faa9182a96f30b225&chksm=bd117e7f8a66f769dc886d38ca2d4e4e675c55e6a5e01e768b383f5859e09384e485da7bed98&scene=4#wechat_redirect");

                            Article article2 = new Article();
                            article2.setTitle("湛江谁有这种女儿,请给我来一打!");
                            article2.setDescription("");
                            article2.setPicUrl("http://www.sinaimg.cn/dy/slidenews/31_img/2016_38/28380_733695_698372.jpg");
                            article2.setUrl("http://mp.weixin.qq.com/s?__biz=MjM5Njc2OTI4NQ==&mid=2650924309&idx=2&sn=d7ffc840c7e6d91b0a1c886b16797ee9&chksm=bd117e7f8a66f7698d094c2771a1114853b97dab9c172897c3f9f982eacb6619fba5e6675ea3&scene=4#wechat_redirect");

                            Article article3 = new Article();
                            article3.setTitle("以上图片我就随意放了");
                            article3.setDescription("");
                            article3.setPicUrl("http://www.sinaimg.cn/dy/slidenews/31_img/2016_38/28380_733695_698372.jpg");
                            article3.setUrl("http://mp.weixin.qq.com/s?__biz=MjM5Njc2OTI4NQ==&mid=2650924309&idx=3&sn=63e13fe558ff0d564c0da313b7bdfce0&chksm=bd117e7f8a66f7693a26853dc65c3e9ef9495235ef6ed6c7796f1b63abf1df599aaf9b33aafa&scene=4#wechat_redirect");

                            articleList.add(article1);
                            articleList.add(article2);
                            articleList.add(article3);
                            newsMessage.setArticleCount(articleList.size());
                            newsMessage.setArticles(articleList);
                            respMessage = MessageUtil.newsMessageToXml(newsMessage);
                            break;
                        }

                        case "13": {
                            //测试网址回复
                            respContent = "<a href=\"http://www.baidu.com\">百度主页</a>";
                            textMessage.setContent(respContent);
                            // 将文本消息对象转换成xml字符串
                            respMessage = MessageUtil.textMessageToXml(textMessage);
                            break;
                        }

                        default: {
                            respContent = "(这是里面的)很抱歉,现在小8暂时无法提供此功能给您使用。\n\n回复“1”显示帮助信息";
                            textMessage.setContent(respContent);
                            // 将文本消息对象转换成xml字符串
                            respMessage = MessageUtil.textMessageToXml(textMessage);
                        }
                    }
                }
            }
        // 图片消息
        else if (msgType.equals(MessageUtil.REQ_MESSAGE_TYPE_IMAGE)) {
            respContent = "您发送的是图片消息!";
            textMessage.setContent(respContent);
            // 将文本消息对象转换成xml字符串
            respMessage = MessageUtil.textMessageToXml(textMessage);
        }
        // 地理位置消息
        else if (msgType.equals(MessageUtil.REQ_MESSAGE_TYPE_LOCATION)) {
            respContent = "您发送的是地理位置消息!";
            textMessage.setContent(respContent);
            // 将文本消息对象转换成xml字符串
            respMessage = MessageUtil.textMessageToXml(textMessage);
        }
        // 链接消息
        else if (msgType.equals(MessageUtil.REQ_MESSAGE_TYPE_LINK)) {
            respContent = "您发送的是链接消息!";textMessage.setContent(respContent);
            // 将文本消息对象转换成xml字符串
            respMessage = MessageUtil.textMessageToXml(textMessage);

        }
        // 音频消息
        else if (msgType.equals(MessageUtil.REQ_MESSAGE_TYPE_VOICE)) {
            respContent = "您发送的是音频消息!";
            textMessage.setContent(respContent);
            // 将文本消息对象转换成xml字符串
            respMessage = MessageUtil.textMessageToXml(textMessage);
        }
    } catch (Exception e) {
        e.printStackTrace();
        }

        return respMessage;
        }
/**
 * 判断是否是QQ表情
 *
 * @param content
 * @return
 */
public static boolean isQqFace(String content) {
        boolean result = false;

        // 判断QQ表情的正则表达式
        String qqfaceRegex = "/::\\)|/::~|/::B|/::\\||/:8-\\)|/::<|/::$|/::X|/::Z|/::'\\(|/::-\\||/::@|/::P|/::D|/::O|/::\\(|/::\\+|/:--b|/::Q|/::T|/:,@P|/:,@-D|/::d|/:,@o|/::g|/:\\|-\\)|/::!|/::L|/::>|/::,@|/:,@f|/::-S|/:\\?|/:,@x|/:,@@|/::8|/:,@!|/:!!!|/:xx|/:bye|/:wipe|/:dig|/:handclap|/:&-\\(|/:B-\\)|/:<@|/:@>|/::-O|/:>-\\||/:P-\\(|/::'\\||/:X-\\)|/::\\*|/:@x|/:8\\*|/:pd|/:<W>|/:beer|/:basketb|/:oo|/:coffee|/:eat|/:pig|/:rose|/:fade|/:showlove|/:heart|/:break|/:cake|/:li|/:bome|/:kn|/:footb|/:ladybug|/:shit|/:moon|/:sun|/:gift|/:hug|/:strong|/:weak|/:share|/:v|/:@\\)|/:jj|/:@@|/:bad|/:lvu|/:no|/:ok|/:love|/:<L>|/:jump|/:shake|/:<O>|/:circle|/:kotow|/:turn|/:skip|/:oY|/:#-0|/:hiphot|/:kiss|/:<&|/:&>";
        Pattern p = Pattern.compile(qqfaceRegex);
        Matcher m = p.matcher(content);
        if (m.matches()) {
        result = true;
        }
        return result;
        }
}

因为这里只是一个demo,所有东西都是写死的,在后期扩展时,把写好的数据库的回复模板加入即可。

4、做完以上,相信你在测试号上能够实现相应的消息回复功能了。下一篇讲自定义菜单的操作。

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转载自my.oschina.net/u/2608504/blog/1580328