Java代码

新建Maven工程

package com.mazun.weixin;import java.io.IOException;
import java.io.PrintWriter;
import java.security.MessageDigest;
import java.util.Arrays;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.commons.codec.binary.Hex;@WebServlet(urlPatterns = "/wx/housekeeper", name = "wxHouseKeeperServlet")
public class HouseKeeper extends HttpServlet {public static final String TOKEN = "mzmzo";@Overrideprotected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {try {// 开发者提交信息后，微信服务器将发送GET请求到填写的服务器地址URL上，GET请求携带参数String signature = request.getParameter("signature");// 微信加密签名（token、timestamp、nonce。）String timestamp = request.getParameter("timestamp");// 时间戳String nonce = request.getParameter("nonce");// 随机数String echostr = request.getParameter("echostr");// 随机字符串PrintWriter out = response.getWriter();// 将token、timestamp、nonce三个参数进行字典序排序String[] params = new String[] { TOKEN, timestamp, nonce };Arrays.sort(params);// 将三个参数字符串拼接成一个字符串进行sha1加密String clearText = params[0] + params[1] + params[2];String algorithm = "SHA-1";String sign = new String(Hex.encodeHex(MessageDigest.getInstance(algorithm).digest((clearText).getBytes()), true));// 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if (signature.equals(sign)) {response.getWriter().print(echostr);}} catch (Exception e) {e.printStackTrace();}}	
}

pom.xml依赖包

	<dependencies><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version></dependency><dependency><groupId>commons-codec</groupId><artifactId>commons-codec</artifactId><version>1.10</version></dependency></dependencies>

编辑完成后到测试号配置页面进行提交即可。