微信二次开发之文本消息请求与发送

这篇文章主要为大家详细介绍了Java微信二次开发第二篇，Java微信文本消息接口请求与发送功能，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

第二篇，做微信文本消息接口请求与发送，具体内容如下

需要导入库：dom4j-1.6.1.jar，xstream-1.3.1.jar

第一步：新建包com.wtz.message.response，新建类BaseMessage.javapackage com.wtz.message.response;/** * @author wangtianze QQ:864620012 * @date 2017年4月19日 下午3:12:40 * <p>version:1.0</p> * <p>description:基础消息类</p> */public class BaseMessage { //接收方 private String ToUserName; //发送方 private String FromUserName; //消息的创建时间 private long CreateTime; //消息类型 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 long getCreateTime() { return CreateTime; } public void setCreateTime(long createTime) { CreateTime = createTime; } public String getMsgType() { return MsgType; } public void setMsgType(String msgType) { MsgType = msgType; }}第二步：找到包com.wtz.message.response，新建类TextMessage.javapackage com.wtz.message.response;/** *@author wangtianze QQ:864620012 * @date 2017年4月19日 下午3:22:33 * <p>version:1.0</p> *<p>description:文本消息类</p> */public class TextMessage extends BaseMessage{ //消息内容 private String Content;public String getContent() {return Content; } public void setContent(String content) {Content = content; }}第三步：找到包com.wtz.util，新建类MessageUtil.javapackage com.wtz.util;import java.io.IOException;import java.io.InputStream;import java.io.Writer;import java.util.HashMap;import java.util.List;import java.util.Map;import javax.servlet.http.HttpServletRequest;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.Element;import org.dom4j.io.SAXReader;import com.thoughtworks.xstream.XStream;import com.thoughtworks.xstream.core.util.QuickWriter;import com.thoughtworks.xstream.io.HierarchicalStreamWriter;import com.thoughtworks.xstream.io.xml.PrettyPrintWriter;import com.thoughtworks.xstream.io.xml.XppDriver;import com.wtz.message.response.TextMessage;/** *@author wangtianze QQ:864620012 * @date 2017年4月19日 下午3:29:58 * <p>version:1.0</p> *<p>description:消息处理工具类</p> */public class MessageUtil { //定义了消息类型（常量：文本类型） public static final String RESP_MESSAGE_TYPE_TEXT = "text";//从流中解析出每个节点的内容 public static Map<String,String> parseXml(HttpServletRequest request) throws IOException{Map<String,String> map = new HashMap<String,String>();//从输入流中获取流对象InputStream in = request.getInputStream();//构建SAX阅读器对象SAXReader reader = new SAXReader();try {//从流中获得文档对象Document doc = reader.read(in);//获得根节点Element root = doc.getRootElement();//获取根节点下的所有子节点List<Element> children = root.elements();for(Element e:children){//遍历每一个节点，并按照节点名--节点值放入map中map.put(e.getName(), e.getText());System.out.println("用户发送的消息XML解析为：" + e.getName() + e.getText());}//关闭流in.close();in = null;} catch (DocumentException e) {// TODO Auto-generated catch blocke.printStackTrace();}return map; }/*** 用于扩展节点数据按照<ToUserName><![CDATA[toUser]]></ToUserName>，中间加了CDATA段*/ private static XStream xstream = new XStream(new XppDriver(){public HierarchicalStreamWriter createWriter(Writer out){return new PrettyPrintWriter(out){boolean cdata = true;public void startNode(String name,Class clazz){super.startNode(name,clazz);}protected void writeText(QuickWriter writer,String text){if(cdata){writer.write("<![CDATA[");writer.write(text);writer.write("]]>");}else{writer.write(text);}}};} });/*** 将文本消息转换成XML格式*/ public static String messageToXml(TextMessage textMessage){xstream.alias("xml",textMessage.getClass());String xml = xstream.toXML(textMessage);System.out.println("响应所转换的XML："+xml);return xml; }}第四步：找到包com.wtz.service，新建类ProcessService.javapackage com.wtz.util;import java.io.IOException;import java.util.Date;import java.util.Map;import javax.servlet.http.HttpServletRequest;import com.wtz.message.response.TextMessage;/** *@author wangtianze QQ:864620012 * @date 2017年4月19日 下午8:04:14 * <p>version:1.0</p> *<p>description:核心服务类</p> */public class ProcessService { public static String dealRequest(HttpServletRequest request) throws IOException{//响应的XML串String respXml = "";//要响应的文本内容String respContent = "未知的消息类型";Map<String,String> requestMap = MessageUtil.parseXml(request);String fromUserName = requestMap.get("FromUserName");String toUserName = requestMap.get("ToUserName");String MsgType = requestMap.get("MsgType");String Content = requestMap.get("Content");System.out.println("用户给公众号发的消息为：" + Content);//构建一条文本消息TextMessage textMessage = new TextMessage();textMessage.setToUserName(fromUserName);textMessage.setFromUserName(toUserName);textMessage.setCreateTime(new Date().getTime());textMessage.setMsgType(MessageUtil.RESP_MESSAGE_TYPE_TEXT);if(MsgType.equals(MessageUtil.RESP_MESSAGE_TYPE_TEXT)){respContent = "王天泽的公众号收到了您的一条文本消息：" + Content + "，时间戳是：" + (new Date().getTime());}textMessage.setContent(respContent);respXml = MessageUtil.messageToXml(textMessage);System.out.println("respXml:"+respXml);return respXml; }}第五步：找到包com.wtz.service下的LoginServlet类，重写doPost方法package com.wtz.service;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.wtz.util.MessageUtil;import com.wtz.util.ProcessService;import com.wtz.util.ValidationUtil;/** *@author wangtianze QQ:864620012 * @date 2017年4月17日 下午8:11:32 * <p>version:1.0</p> *<p>description:微信请求验证类</p> */public class LoginServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {System.out.println("get请求。。。。。。");//1.获得微信签名的加密字符串String signature = request.getParameter("signature");//2.获得时间戳信息String timestamp = request.getParameter("timestamp");//3.获得随机数String nonce = request.getParameter("nonce");//4.获得随机字符串String echostr = request.getParameter("echostr");System.out.println("获得微信签名的加密字符串："+signature);System.out.println("获得时间戳信息："+timestamp);System.out.println("获得随机数："+nonce);System.out.println("获得随机字符串："+echostr);PrintWriter out = response.getWriter();//验证请求确认成功原样返回echostr参数内容，则接入生效，成为开发者成功，否则失败if(ValidationUtil.checkSignature(signature, timestamp, nonce)){out.print(echostr);}out.close();out = null; } /*** 接受微信服务器发过来的XML数据包（通过post请求发送过来的）*/ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {request.setCharacterEncoding("utf-8");response.setCharacterEncoding("utf-8");//获取微信加密的签名字符串String signature = request.getParameter("signature");//获取时间戳String timestamp = request.getParameter("timestamp");//获取随机数String nonce = request.getParameter("nonce");PrintWriter out = response.getWriter();if(ValidationUtil.checkSignature(signature,timestamp,nonce)){String respXml = "";try {respXml = ProcessService.dealRequest(request);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}out.print(respXml);}out.close();out = null; }}完成微信文本消息接口请求与发送。

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