微信公众号开发（2）——文本消息、图文消息发送

快来打我* 2022-04-01 09:52 809阅读 0赞

接上一讲，[微信公众号开发（1）——服务器配置][1]

新建几个信息类：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70][]

package com.imooc.po;
    
    /**
     * 信息基类
     * @author lyj
     *
     */
    public class BaseMessage {
    
    	private String ToUserName;
    	private String FromUserName;
    	private Long CreateTime;
    	private String MsgType;
    	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;
    	}
    	
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 1][]

package com.imooc.po;
    
    /**
     * 文本消息类封装
     * @author lyj
     *
     */
    public class TextMessage extends BaseMessage{
    
    	private String Content;
    	private String MsgId;
    	
    	public String getContent() {
    		return Content;
    	}
    	public void setContent(String content) {
    		Content = content;
    	}
    	public String getMsgId() {
    		return MsgId;
    	}
    	public void setMsgId(String msgId) {
    		MsgId = msgId;
    	}
    	
    	
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 2][]

package com.imooc.po;
    
    /**
     * 图文消息类
     * @author lyj
     *
     */
    public class News {
    
    	private String Title;
    	private String Description;
    	private String PicUrl;
    	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 getPicUrl() {
    		return PicUrl;
    	}
    	public void setPicUrl(String picUrl) {
    		PicUrl = picUrl;
    	}
    	public String getUrl() {
    		return Url;
    	}
    	public void setUrl(String url) {
    		Url = url;
    	}
    	
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 3][]

package com.imooc.po;
    
    import java.util.List;
    
    public class NewsMessage extends BaseMessage{
    
    	private int ArticleCount;
    	private List<News> Articles;
    	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;
    	}
    	
    }

需要的jar包：

![20181230101842675.png][]

MessageUtil.java工具类的详细代码：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 4][]

package com.imooc.util;
    
    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 org.dom4j.Document;
    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_LOCARION="location";
    	public static final String MESSAGE_EVENT="event";
    	public static final String MESSAGE_SUBSCRIBE="subscribe";
    	public static final String MESSAGE_CLICK="CLICK";
    	public static final String MESSAGE_VIEW="VIEW";
    	
    	
    	
    	
    	
    	/**
    	 * xml文件转换为Map集合
    	 * @param request
    	 * @return
    	 * @throws Exception
    	 */
    	public static Map<String,String>  xmlToMap(HttpServletRequest request)throws Exception{
    		Map<String,String>map=new HashMap<String,String>();
    		SAXReader reader=new SAXReader();
    		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;
    	}
    	/**
    	 * 将文本对象转换为xml
    	 * @param textMessage
    	 * @return
    	 */
    	public static String textMessageToXml(TextMessage textMessage) {
    		XStream xstream=new XStream();
    		xstream.alias("xml", textMessage.getClass());
    		return xstream.toXML(textMessage);
    	}
    	/**
    	 * 将图文消息转换为xml
    	 * @param newsMessage
    	 * @return
    	 */
    	public static String newsMessageToXml(NewsMessage newsMessage) {
    		XStream xstream=new XStream();
    		xstream.alias("xml", newsMessage.getClass());//将根节点转换为<xml></xml>
    		xstream.alias("item", new News().getClass());
    		return xstream.toXML(newsMessage);
    	}
    	
    	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(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，请按照菜单提示开始操作:\n\n");
    		sb.append("1:朱一龙介绍\n");
    		sb.append("2:朱一龙出演过的作品\n\n");
    		sb.append("回复？调出此菜单.");
    		return sb.toString();
    		
    		
    	}
    	
    	public static String firstMenu() { //用户输入“1"时服务器回复的消息
    		StringBuffer sb=new StringBuffer();
    		sb.append("朱一龙，1988年4月16日出生于湖北武汉，中国内地男演员，毕业于北京电影学院2006级表演系本科。");
    		return sb.toString();
    	}
    	public static String secondMenu() { //用户输入"2"时回复的消息
    		StringBuffer sb=new StringBuffer();
    		sb.append("2009年出演首部电影《再生缘》，后参演多部《周末王刚讲故事》（又名：《儿女传奇》）系列数字电影；2010年参演古装系列电影《大明嫔妃》 [1]  ；2012年在家庭情感轻喜剧《家宴》中饰演冯豆子 [2]  ；2014年在民国爱情剧《情定三生》中饰演豪门少爷迟瑞，随后，凭借该角色于2015年1月26日获得亚洲影响力东方盛典最具潜力男演员奖；2015年因在古装历史剧《芈月传》中饰演秦昭襄王嬴稷而受到广泛关注 [3]  ；2016年2月，在古装武侠剧《新萧十一郎》中饰演风采翩翩、文武兼备的无垢山庄少庄主连城璧 [4]  ；7月，在武侠小说《新边城浪子》中饰演黑衣黑刀傅红雪 [5]  。2017年，主演年代爱情剧《许你浮生若梦》 [6]  。2018年6月主演奇幻网络剧《镇魂》，分饰沈巍、夜尊、黑袍使三角，凭借精湛演绎人气飙升，同时为该剧演唱推广曲《时间飞行》 [7-8]  。10月，悬疑冒险剧《盗墓笔记重启》开机，饰演吴邪。");
    		return sb.toString();
    	}
    	
    	
    	
    	/**
    	 * 图文消息的组装
    	 * @param toUserName
    	 * @param fromUserName
    	 * @return
    	 */
    	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();
    		news.setTitle("朱一龙");
    		news.setDescription("2009年4月，在电影《再生缘》中饰演刺客阮应");
    		news.setPicUrl("http://example.ngrok.xiaomiqiu.cn/WeiXin/image/朱一龙.jpg");
    		news.setUrl("www.baidu.com");
    		
    		News news2=new News();
    		news2.setTitle("朱哥");
    		news2.setDescription("当公众号具备留言功能以留言，或仅公众号粉丝可以留言）。");
    		news2.setPicUrl("http://example.ngrok.xiaomiqiu.cn/WeiXin/image/jiajingwen-001.jpg");
    		news2.setUrl("www.baidu.com");
    		
    		newsList.add(news);
    		newsList.add(news2);
    		
    		newsMessage.setToUserName(fromUserName);
    		newsMessage.setFromUserName(toUserName);
    		newsMessage.setCreateTime(new Date().getTime());
    		newsMessage.setMsgType(MESSAGE_NEWS);
    		newsMessage.setArticles(newsList);
    		newsMessage.setArticleCount(newsList.size());
    		
    		message=newsMessageToXml(newsMessage);
    		return message;
    		
    	}
    }

WeixinServlet.java里面添加doPost相关代码：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 5][]

@Override
    	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    
    		resp.setCharacterEncoding("UTF-8");
    		req.setCharacterEncoding("utf-8");
    		PrintWriter out=resp.getWriter();
    		Map<String, String> map;
    		try {
    			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.initNewsMessage(ToUserName, FromUserName);
    			}else if("?".equals(Content)||"？".equals(Content)) {
    				message=MessageUtil.initText(ToUserName, FromUserName, MessageUtil.menuText());
    			}else {
    				message=MessageUtil.initText(ToUserName, FromUserName, "晴晴，能不能好好输，别乱输");
    			}
    				/*
             		TextMessage text=new TextMessage();
    				text.setFromUserName(ToUserName);
    				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); */
    			}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());
    				}
    			}
    			System.out.println(message);
    			out.print(message);
    		} catch (Exception e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}finally {
    			out.close();
    		}
    		
    	
    	}

至此，大功告成，用户输入相应的数字或字符，微信后台就可以回复对应的文本消息和图文消息了。

[1]: https://blog.csdn.net/yongbutingxide/article/details/85370735
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70]: /images/20220401/6924dac3f5f44a13855c182e7d24f62b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 1]: /images/20220401/1913afcd966740e3bcc7db4617034808.png
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[20181230101842675.png]: /images/20220401/1d7d82c1b36e4a96a11c05900afd1359.png
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