微信回复图文消息

1：先创建两个实体类

import lombok.Getter;
import lombok.Setter;

import java.util.List;
@Setter
@Getter
public class NewsMessage extends WxMessage{
  // 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;
}

import lombok.Getter;
import lombok.Setter;

@Setter
@Getter
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
  private String PicUrl;
  // 点击图文消息跳转链接
  private String Url;
}

4：创建私有方法回复图文消息

 private String getWxNewsMessage(String fromUserName, String toUserName) {
    // 创建图文消息(回复用)
    NewsMessage newsMessage = new NewsMessage();
    newsMessage.setToUserName(fromUserName);//开发者账号
    newsMessage.setFromUserName(toUserName);//用户openId
    newsMessage.setCreateTime(new Date().getTime()+"");//创建时间
    newsMessage.setMsgType(MessageUtil.RESP_MESSAGE_TYPE_NEWS);//图文消息
    List<Article> articleList = new ArrayList<>();

    Article article = new Article();
    article.setTitle("标题");
    article.setDescription("描述");
    article.setPicUrl("图片地址");
    article.setUrl("https://www.cnblogs.com/zlw-xf/p/7221035.html");
    articleList.add(article);

    // 设置图文消息个数
    newsMessage.setArticleCount(articleList.size());
    // 设置图文消息包含的图文集合
    newsMessage.setArticles(articleList);

    // 将图文消息对象转换成xml字符串
    String respMessage = MessageUtil.messageToXml(newsMessage);
    return respMessage;
  }

5：调用方法messageToXml

 /**
   * 图文消息对象转换成xml
   *
   * @param wxNewsMessage 图文消息对象
   * @return xml
   */
  public static String messageToXml(Object wxNewsMessage){
    XStream xstream = new XStream(new DomDriver("utf-8"));
    xstream.autodetectAnnotations(true);
    xstream.alias("xml", wxNewsMessage.getClass());
    xstream.alias("item",new Article().getClass());
    return xstream.toXML(wxNewsMessage);
  }

3：判断是否是关键字  调用回复图文消息

private String doReplyText(Map<String, String> requestMap) throws Exception {
    String respMessage = null;
    String fromUserName = requestMap.get("FromUserName");
    // 公众帐号
    String toUserName = requestMap.get("ToUserName");
    // 消息类型
    String msgType = requestMap.get("MsgType");
    String content = requestMap.get("Content");
    log.info("收到用户输入的文本消息：" + content);
    String replyContent=null;
    
    if (content.trim().equals("关键字")) {
       respMessage = getWxNewsMessage(fromUserName,toUserName);
    }  else {
      respMessage = getWxTxtMessage(fromUserName,toUserName,"此功能后续开放...");
    }
    return respMessage;
  }

2：判断微信公众号输入的是什么消息类型

 public String doWxPost(HttpServletRequest request) {
    String respMessage = null;
    try {
      // xml请求解析
      Map<String, String> requestMap = MessageUtil.xmlToMap(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");
      log.info("FromUserName is:" + fromUserName + ", ToUserName is:" + toUserName + ", MsgType is:" + msgType);
      // 文本消息
      if (msgType.equals(MessageUtil.REQ_MESSAGE_TYPE_TEXT)) {
        respMessage = doReplyText(requestMap);
      } else if (msgType.equals(MessageUtil.REQ_MESSAGE_TYPE_EVENT)) {
        String eventType = requestMap.get("Event");// 事件类型
        log.info("收到用户的事件消息：" + eventType);
        // 订阅
        if (eventType.equals(MessageUtil.EVENT_TYPE_SUBSCRIBE)) {
          /**
           * 订阅后默认回复
           */
          respMessage = doSubscribe(requestMap);
        } else if (eventType.equals(MessageUtil.EVENT_TYPE_UNSUBSCRIBE)) {// 取消订阅
          log.info("----取消订阅----");
        } else if (eventType.equals(MessageUtil.EVENT_TYPE_CLICK)) {
          respMessage = doMenuClickAndReturn(requestMap);
        } else if (eventType.equals(MessageUtil.CARD_PASS_CHECK)) {
          log.info("卡券审核通过");
        } else if (eventType.equals(MessageUtil.CARD_NOT_PASS_CHECK)) {
          log.info("卡券未审核通过");
        } else if (eventType.equals(MessageUtil.USER_GET_CARD)) {//用户领取卡券
          doUserGetCard(requestMap);
        } else if (eventType.equals(MessageUtil.USER_DEL_CARD)) {//用户删除卡券
          doUserDelCard(requestMap);
        } else if (eventType.equals(MessageUtil.USER_CONSUME_CARD)) {//核销卡券
          doUserConsumeCard(requestMap);
        }
      }
    } catch (Exception e) {
      e.printStackTrace();
      log.error("error：" + e.getMessage());
    }
    return respMessage;
  }