微信公众号开发 - 4.发送图文消息

前言

来看看图文消息的参数

XML实例，分析一下大概就是下面这个样子

<xml>
<!--图文消息-->
<ToUserName><![CDATA[toUser]]></ToUserName>
<FromUserName><![CDATA[fromUser]]></FromUserName>
<CreateTime>12345678</CreateTime>
<MsgType><![CDATA[news]]></MsgType>
<ArticleCount>2</ArticleCount>
<!--图文消息的内容-->
<Articles>
    <!--第一条-->
    <item>
    <Title><![CDATA[title1]]></Title> 
    <Description><![CDATA[description1]]></Description>
    <PicUrl><![CDATA[picurl]]></PicUrl>
    <Url><![CDATA[url]]></Url>
    </item>
    <!--第二条-->
    <item>
    <Title><![CDATA[title]]></Title>
    <Description><![CDATA[description]]></Description>
    <PicUrl><![CDATA[picurl]]></PicUrl>
    <Url><![CDATA[url]]></Url>
    </item>
</Articles>
</xml>

实体

将重复使用的类提取为父类

package cn.notemi.po;

/**
 * Title：BaseMessage
 * Description：message 重复的属性提取为父类
 *
 * @author Flicker
 * @create 2017-07-26 下午 4:34
 **/
public class BaseMessage {
    private String ToUserName;
    private String FromUserName;
    private String 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 String getCreateTime() {
        return CreateTime;
    }

    public void setCreateTime(String createTime) {
        CreateTime = createTime;
    }

    public String getMsgType() {
        return MsgType;
    }

    public void setMsgType(String msgType) {
        MsgType = msgType;
    }
}

图文消息

package cn.notemi.po;

import java.util.List;

/**
 * Title：NewsMessage
 * Description：图文消息
 *
 * @author Flicker
 * @create 2017-07-26 下午 4:34
 **/
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;
    }
}

图文消息内容

package cn.notemi.po;

/**
 * Title：News
 * Description：图文消息内容
 *
 * @author Flicker
 * @create 2017-07-26 下午 4:31
 **/
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;
    }
}

之前的文字消息

package cn.notemi.po;

/**
 * Title：TextMessage
 * Description：文字消息
 *
 * @author Flicker
 * @create 2017-07-25 下午 8:40
 **/
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;
    }
}

转化拼接图文消息

package cn.notemi.util;

import cn.notemi.po.News;
import cn.notemi.po.NewsMessage;
import cn.notemi.po.TextMessage;
import com.thoughtworks.xstream.XStream;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import javax.servlet.http.HttpServletRequest;
import java.io.InputStream;
import java.util.*;

/**
 * Title：MessageUtil
 * Description：消息的转换
 *
 * @author Flicker
 * @create 2017-07-25 下午 8:19
 **/
public class MessageUtil {

    public static final String MESSAGE_NEWS = "news";
    
    /**
     * 将图文消息消息对象转为xml
     * @param newsMessage
     * @return
     */
    public static String NewsMessageToXml(NewsMessage newsMessage){
        XStream xStream = new XStream();
        xStream.alias("xml",newsMessage.getClass());
        xStream.alias("item",new News().getClass());
        return xStream.toXML(newsMessage);
    }

    /**
     * 拼装图文消息
     * @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();

        //内容
        News news = new News();
        news.setTitle("小米笔记介绍");
        news.setDescription("这里是小米笔记的介绍介绍介绍");
        news.setPicUrl("http://6hsfsi.natappfree.cc/static/img/logo.png");
        news.setUrl("http://notemi.cn");

        newsList.add(news);

        //图文消息属性
        newsMessage.setToUserName(fromUserName);
        newsMessage.setFromUserName(toUserName);
        newsMessage.setCreateTime(String.valueOf(new Date().getTime()));
        newsMessage.setMsgType(MESSAGE_NEWS);
        newsMessage.setArticles(newsList);
        newsMessage.setArticleCount(newsList.size());

        message = NewsMessageToXml(newsMessage);
        return  message;

    }
}

Controller

    if ("1".equals(content)){
        message = MessageUtil.initNewsMessage(toUserName,fromUserName);
    }

测试

源代码

Weixin.rar