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。
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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 ListArticles; 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 ListArticles; }
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()); Listarticles = 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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