微信公众平台接口调试（微信订阅号自动回复接口）

refer : https://mp.weixin.qq.com/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 node            Element 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(  //                        "{http://xml.apache.org/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.weixin.qq.com/debug/