微信公众号开发之回复图文消息java代码

微信公众号开发之回复图文消息，供大家参考，具体内容如下

图文消息的主要参数说明

通过微信官方的消息接口指南，可以看到对图文消息的参数介绍，如下图所示：

从上图可以了解到：

1、图文消息的个数限制为10，也就是图文中ArticleCount的值（图文消息的个数，限制在10条以内）

2、对于图文消息，第一条图文的图片显示为大图，其他图文的图片显示为小图。

3、第一条图文的图片大小建议为640*320，其他图文的图片建议为80*80

下面开始实现：

请求消息的基类：

import com.thoughtworks.xstream.annotations.XStreamAlias;

import java.io.Serializable;

/**
 * @author inchlifc
 */
public class BaseMessage implements Serializable {
  @XStreamAlias("ToUserName")
  @XStreamCDATA
  private String ToUserName;

  @XStreamAlias("FromUserName")
  @XStreamCDATA
  private String FromUserName;

  @XStreamAlias("CreateTime")
  private Long CreateTime;

  @XStreamAlias("MsgType")
  @XStreamCDATA
  private String MsgType;

  public BaseMessage() {
    super();
  }

  public BaseMessage(String fromUserName, String toUserName) {
    super();
    FromUserName = fromUserName;
    ToUserName = toUserName;
    CreateTime = System.currentTimeMillis();
  }

  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;
  }
}

图文消息类：

import com.thoughtworks.xstream.annotations.XStreamAlias;

import java.util.List;

@XStreamAlias("xml")
public class ArticlesMessage extends BaseMessage {
  @XStreamAlias("ArticleCount")
  private int ArticleCount;

  @XStreamAlias("Articles")
  private List<ArticlesItem> Articles;

  public int getArticleCount() {
    return ArticleCount;
  }

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

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

  public void setArticles(List<ArticlesItem> articles) {
    Articles = articles;
  }
}

图文消息中的Articles类：

import com.thoughtworks.xstream.annotations.XStreamAlias;

import java.util.List;
@XStreamAlias("Articles")
public class Articles {
  private List<ArticlesItem> Articles;
}

图文消息中的ArticlesItem类：

import com.thoughtworks.xstream.annotations.XStreamAlias;

import java.io.Serializable;

@XStreamAlias("item")
public class ArticlesItem implements Serializable {
  @XStreamAlias("Title")
  @XStreamCDATA
  private String Title;

  @XStreamAlias("Description")
  @XStreamCDATA
  private String Description;

  @XStreamAlias("PicUrl")
  @XStreamCDATA
  private String PicUrl;

  @XStreamAlias("Url")
  @XStreamCDATA
  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;
  }
}

service层实现方法：

封装方法

/**
   * 获取博客图文消息
   *
   * @param custermName
   * @param serverName
   * @param createTime
   * @return
   */
  private ArticlesMessage getBlogMessage(String custermName, String serverName, Long createTime) {
    ArticlesMessage outputMsg = new ArticlesMessage();
    outputMsg.setFromUserName(serverName);
    outputMsg.setToUserName(custermName);
    outputMsg.setCreateTime(createTime);
    outputMsg.setMsgType(MsgType.NEWS.getValue());

    List<ArticlesItem> articles = new ArrayList<>();

    ArticlesItem item1 = new ArticlesItem();
    item1.setTitle("晚天吹凉风");
    item1.setDescription("点击进入晚天吹凉风博客");
    item1.setPicUrl(WechatConstant.BASE_SERVER + "resources/images/wechat/a.png");
    item1.setUrl("https://my.oschina.net/inchlifc/blog");
    articles.add(item1);

    outputMsg.setArticles(articles);
    outputMsg.setArticleCount(articles.size());

    return outputMsg;
  }

判断如果输入数字1，返回图文消息推送

// 处理接收消息
    ServletInputStream in = request.getInputStream();
    // 将POST流转换为XStream对象
    XStream xs = new XStream();
    xs = SerializeXmlUtil.createXstream();
    XStream.setupDefaultSecurity(xs);
    xs.allowTypes(new Class[]{TextMessage.class, InputMessage.class, ArticlesMessage.class});
    xs.processAnnotations(InputMessage.class);
    xs.processAnnotations(ArticlesMessage.class);
    xs.processAnnotations(ImageMessage.class);
    // 将指定节点下的xml节点数据映射为对象
    xs.alias("xml", InputMessage.class);
    // 将流转换为字符串
    StringBuilder xmlMsg = new StringBuilder();
    byte[] b = new byte[4096];
    for (int n; (n = in.read(b)) != -1; ) {
      xmlMsg.append(new String(b, 0, n, "UTF-8"));
    }
    logger.info("收到消息====" + xmlMsg.toString());
    // 将xml内容转换为InputMessage对象
    InputMessage inputMsg = (InputMessage) xs.fromXML(xmlMsg.toString());

    // 服务端
    String servername = inputMsg.getToUserName();
    // 客户端
    String custermname = inputMsg.getFromUserName();
    // 接收时间
    long createTime = inputMsg.getCreateTime();
    // 返回时间
    Long returnTime = Calendar.getInstance().getTimeInMillis() / 1000;
    //接手文本内容
    String content = inputMsg.getContent();
    // 取得消息类型
    String msgType = inputMsg.getMsgType();

if (MsgType.TEXT.getValue().equals(msgType)) {
        //输入1 推送博客信息
        if ("1".equals(content)) {
          logger.info("收到文本1");
          ArticlesMessage outputMsg = getBlogMessage(custermname, servername, returnTime);
          logger.info("返回博客图文消息===" + xs.toXML(outputMsg));
          response.getWriter().write(xs.toXML(outputMsg));
        }
}

运行结果：

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