如何使用java开发微信公众号之回复图文消息功能

这篇文章主要介绍了如何使用java开发微信公众号之回复图文消息功能，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。

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 Articles;  public int getArticleCount() {    return ArticleCount;  }  public void setArticleCount(int articleCount) {    ArticleCount = articleCount;  }  public List getArticles() {    return Articles;  }  public void setArticles(List 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 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 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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