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.java

package 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.java

package 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.java

package 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 block e.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.java

package 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 block e.printStackTrace(); } out.print(respXml); } out.close(); out = null; }}

完成微信文本消息接口请求与发送。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。