refer : https://mp./wiki
第一步：填写服务器配置
注意：填完了之后先不要点确定，先做第二步，做完第二步再点确定。
第二步：验证消息的确来自微信服务器 并返回数据
开发者通过检验signature对请求进行校验（下面有校验方式）。若确认此次GET请求来自微信服务器，请原样返回echostr参数内容，则接入生效，成为开发者成功，否则接入失败。加密/校验流程如下：
1）将token、timestamp、nonce三个参数进行字典序排序
2）将三个参数字符串拼接成一个字符串进行sha1加密
3）开发者获得加密后的字符串可与signature对比，标识该请求来源于微信
要想快速通过，不检验也可以，直接返回echostr的内容即可。
附上java的代码：
@RequestMapping("/wx/getMsg.htm")public ModelAndView mock(String echostr, HttpSession httpSession, HttpServletResponse response,HttpServletRequest request) throws Exception{if ( ! StringUtil.isNull(request.getParameter("echostr"))) {PrintWriter writer = response.getWriter();writer.print(request.getParameter("echostr"));writer.flush();writer.close();return null;}System.out.println(request.getRequestURL());System.out.println(request.getQueryString());// 取HTTP请求流 ServletInputStream sis = request.getInputStream(); // 取HTTP请求流长度 int size = request.getContentLength(); if (size<0) return null;// 用于缓存每次读取的数据 byte[] buffer = new byte[size]; // 用于存放结果的数组 byte[] xmldataByte = new byte[size]; int count = 0; int rbyte = 0; // 循环读取 while (count < size) { // 每次实际读取长度存于rbyte中 rbyte = sis.read(buffer); for(int i=0;i<rbyte;i++) { xmldataByte[count + i] = buffer[i]; } count += rbyte; } String xmlData = new String(xmldataByte, "UTF-8");System.out.println("recv from wx ->" + xmlData);WxTextMsgBean wx = new WxTextMsgBean();XMLUtil.parserWXRecvMsgxml(xmlData, wx );String rtnStr = XMLUtil.createWXSendMsgXml(wx, "我就是不告诉你，不服你来打我啊。");response.setContentType("text/html");response.setCharacterEncoding("UTF-8"); PrintWriter writer = response.getWriter();writer.print(rtnStr);writer.flush();writer.close();return null;}
XML解析相关:
package xm.web.utils;import java.io.IOException;import java.io.StringReader;import java.io.StringWriter;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.parsers.ParserConfigurationException;import javax.xml.transform.OutputKeys;import javax.xml.transform.TransformerFactory;import javax.xml.transform.dom.DOMSource;import javax.xml.transform.stream.StreamResult;import org.w3c.dom.Document;import org.w3c.dom.Element;import org.w3c.dom.NodeList;import org.xml.sax.InputSource;import org.xml.sax.SAXException;import xm.web.bean.wx.msg.WxTextMsgBean;public class XMLUtil {public static String createWXSendMsgXml(WxTextMsgBean msg, String textMsgContent) {try {DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = factory.newDocumentBuilder();Document document = builder.newDocument();Element root = document.createElement("xml");document.appendChild(root);// add a nodeElement toUserName = document.createElement("ToUserName");root.appendChild(toUserName);toUserName.appendChild(document.createCDATASection(msg.getFromUserName()));Element fromUserName = document.createElement("FromUserName");root.appendChild(fromUserName);fromUserName.appendChild(document.createCDATASection(msg.getToUserName()));Element createTime = document.createElement("CreateTime");root.appendChild(createTime);createTime.appendChild(document.createTextNode(String.valueOf(System.currentTimeMillis())));Element msgType = document.createElement("MsgType");root.appendChild(msgType);msgType.appendChild(document.createCDATASection("text"));Element content = document.createElement("Content");root.appendChild(content);content.appendChild(document.createCDATASection(textMsgContent));String rtn = toStringFromDoc(document);rtn = rtn.replace("<?xml version=\"1.0\" encoding=\"UTF-8\"?>", "");System.out.println(rtn);return rtn;} catch (Exception e) {System.out.println(e.getMessage());}return null;}/*** 解析微信发来的【文本】消息* @param xmlStr 字符串xml* @param wx WxRecvMsgBean 用来存放解析结果*/public static void parserWXRecvMsgxml(String xmlStr, WxTextMsgBean wx) {DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder; try { builder = factory.newDocumentBuilder();StringReader sr = new StringReader(xmlStr);InputSource is = new InputSource(sr);Document doc = builder.parse(is); NodeList nodeList=doc.getElementsByTagName("*");for(int i=0;i<nodeList.getLength();i++){switch (nodeList.item(i).getNodeName()) {case "ToUserName":wx.setToUserName(nodeList.item(i).getTextContent());break;case "FromUserName":wx.setFromUserName(nodeList.item(i).getTextContent());break;case "CreateTime":wx.setCreateTime(nodeList.item(i).getTextContent());break;case "MsgType":wx.setMsgType(nodeList.item(i).getTextContent());break;case "Content":wx.setContent(nodeList.item(i).getTextContent());break;case "MsgId":wx.setMsgId(nodeList.item(i).getTextContent());break;default:break;}}}catch(ParserConfigurationException e){e.printStackTrace(); }catch (SAXException e){e.printStackTrace(); }catch(IOException e){e.printStackTrace(); } }/* * 把dom文件转换为xml字符串 */ public static String toStringFromDoc(Document document) { String result = null; document.setXmlStandalone(false);if (document != null) { StringWriter strWtr = new StringWriter(); StreamResult strResult = new StreamResult(strWtr); TransformerFactory tfac = TransformerFactory.newInstance(); try { javax.xml.transform.Transformer t = tfac.newTransformer(); //t.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); t.setOutputProperty(OutputKeys.INDENT, "yes"); //t.setOutputProperty(OutputKeys.METHOD, "xml");// text //t.setOutputProperty( // "{/xslt}indent-amount", "4"); //t.clearParameters();t.transform(new DOMSource(document.getDocumentElement()), strResult); } catch (Exception e) { System.err.println("XML.toString(Document): " + e); } result = strResult.getWriter().toString(); try { strWtr.close(); } catch (IOException e) { e.printStackTrace(); } } return result; } }
package xm.web.bean.wx.msg;public class WxTextMsgBean {private String toUserName;private String fromUserName;private String createTime;private String msgType;private String content;private String msgId;public String getToUserName() {return toUserName;}public void setToUserName(String toUserName) {this.toUserName = toUserName;}public String getFromUserName() {return fromUserName;}public void setFromUserName(String fromUserName) {this.fromUserName = fromUserName;}public String getCreateTime() {return createTime;}public void setCreateTime(String createTime) {this.createTime = createTime;}public String getMsgType() {return msgType;}public void setMsgType(String msgType) {this.msgType = msgType;}public String getContent() {return content;}public void setContent(String content) {this.content = content;}public String getMsgId() {return msgId;}public void setMsgId(String msgId) {this.msgId = msgId;}}
附上调试的链接：
https://mp./debug/
