前期准备
准备如下
个人只能申请订阅号，而且不能进行微信认证，但是可以申请公众平台测试账号，拥有全部的权限，(首页—>开发者工具—>公众平台测试账号）
接入
在公网部署好一个web项目，一定是80或者443端口。
pom.xml
4.0.0 com.wx.aeolian com.wx.aeolian 1.0-SNAPSHOT javax.servlet javax.servlet-api 3.1.0 provided javax.servlet.jsp jsp-api 2.2 provided javax.servlet jstl 1.2 runtime commons-codec commons-codec 1.12 UTF-8 D:\ProgramFiles_QY\IdeaProjects\WxAeolian org.apache.maven.plugins maven-compiler-plugin 3.3 1.7 1.7 org.apache.maven.plugins maven-surefire-plugin 2.18.1 true org.apache.tomcat.maven tomcat7-maven-plugin 2.2 /${project.artifactId}
核心Servlet
package com.aeolian.core;import org.apache.commons.codec.digest.DigestUtils;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 java.io.IOException;import java.util.*;@WebServlet("/wxCore")public class WxServlet extends HttpServlet{ @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException { try { doPost(req,resp); } catch (ServletException e) { e.printStackTrace(); } } /*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*/ @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String signature = req.getParameter("signature"); String timestamp = req.getParameter("timestamp"); String nonce = req.getParameter("nonce"); String echostr = req.getParameter("echostr"); String token = "微信公众平台中设置的token"; //微信公众平台中配置 /*1）将token、timestamp、nonce三个参数进行字典序排序*/ String[] str = { token, timestamp, nonce }; Arrays.sort(str); // 字典序排序 String sortStr = str[0] + str[1] + str[2]; //排序后拼接 /*2）将三个参数字符串拼接成一个字符串进行sha1加密*/ String digest = DigestUtils.sha1Hex(sortStr); /*System.out.println("signature: "+signature); System.out.println("timestamp: "+timestamp); System.out.println("nonce: "+nonce); System.out.println("echostr: "+echostr); System.out.println("nosha1: "+sortStr); System.out.println("digest: "+digest);*/ /*3)校验*/ String result = ""; if (digest.equals(signature)){ //与signature对比，标识该请求来源于微信 result = echostr; //如果是,返回echostr } resp.resetBuffer(); resp.setContentType("text/html;charset=utf-8"); resp.getOutputStream().write(result.getBytes("utf-8")); resp.getOutputStream().flush(); }} 打成war包是注意事项，在Artifacts中右击Available Elements-》put into /WEB-INF/lib，否则打成的包中没有pom引入的jar
