微信公众号开发者模式接入

使用自己申请的服务器（腾讯云服务器，免费使用180天），配合微信公众平台接入指南。

1，获取微信服务器传来的信息

package cn.csy.servlet;

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 cn.csy.util.CheckUtil;

public class WeixinServlet extends HttpServlet {

 @Override
 protected void doGet(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");
  
  PrintWriter out = resp.getWriter();
  if (CheckUtil.checkSignature(signature, timestamp, nonce)) {
   out.println(echostr);
  }
 }
 
}

2.工具类，进行token验证

package cn.csy.util;

import java.security.MessageDigest;
import java.util.Arrays;

public class CheckUtil {

 private static final String token = "weixinTest";
 public static boolean checkSignature(String signature,String timestamp,String nonce) {
  
  String[] arr = {token,timestamp,nonce};

  //排序
  Arrays.sort(arr);
  
  //生成字符串
  StringBuffer content = new StringBuffer();
  for (int i = 0; i < arr.length; i++) {
   content.append(arr[i]);
  }
  
  //sha1加密
  String temp = getSha1(content.toString());
  return temp.equals(signature);
 }
 
 //Sha1签名 
    public static String getSha1(String str) { 
        if (str == null || str.length() == 0) { 
            return null; 
        } 
        char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 
                'a', 'b', 'c', 'd', 'e', 'f' }; 
 
        try { 
            MessageDigest mdTemp = MessageDigest.getInstance("SHA1"); 
            mdTemp.update(str.getBytes("UTF-8")); 
 
            byte[] md = mdTemp.digest(); 
            int j = md.length; 
            char buf[] = new char[j * 2]; 
            int k = 0; 
            for (int i = 0; i < j; i++) { 
                byte byte0 = md[i]; 
                buf[k++] = hexDigits[byte0 >>> 4 & 0xf]; 
                buf[k++] = hexDigits[byte0 & 0xf]; 
            } 
            return new String(buf); 
        } catch (Exception e) { 
            return null; 
        } 
    } 
}

3.配置servlet

 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

  Archetype Created Web Application
 
 
      weixinServlet
      cn.csy.servlet.WeixinServlet
 
 
 
      weixinServlet
      /wx.do
 
 
 
      index.jsp