Java微信二次開發(fā)（一）Java微信請(qǐng)求驗(yàn)證功能

package com.wtz.service;

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 com.wtz.util.ValidationUtil;

/**
 * 　　@author wangtianze QQ:864620012
 * @date 2017年4月17日 下午8:11:32
 * 
version:1.0
 *  
description:微信請(qǐng)求驗(yàn)證類
 */
public class LoginServlet extends HttpServlet {

 @Override
 protected void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  System.out.println("get請(qǐng)求。。。。。。");
  
  //1.獲得微信簽名的加密字符串
  String signature = request.getParameter("signature");
  
  //2.獲得時(shí)間戳信息
  String timestamp = request.getParameter("timestamp");
   
  //3.獲得隨機(jī)數(shù)
  String nonce = request.getParameter("nonce");
  
  //4.獲得隨機(jī)字符串
  String echostr = request.getParameter("echostr");
  
  System.out.println("獲得微信簽名的加密字符串："+signature);
  System.out.println("獲得時(shí)間戳信息："+timestamp);
  System.out.println("獲得隨機(jī)數(shù)："+nonce);
  System.out.println("獲得隨機(jī)字符串："+echostr);
  
  PrintWriter out = response.getWriter();
  
  //驗(yàn)證請(qǐng)求確認(rèn)成功原樣返回echostr參數(shù)內(nèi)容，則接入生效，成為開發(fā)者成功，否則失敗
  if(ValidationUtil.checkSignature(signature, timestamp, nonce)){
   out.print(echostr);
  }
  
  out.close();
  out = null;
 }
}

package com.wtz.util;

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

/**
 *  @author wangtianze QQ:864620012
 * @date 2017年4月17日 下午8:35:57
 * 
version:1.0
 *  
description:微信請(qǐng)求校驗(yàn)工具類
 */
public class ValidationUtil {
 private static String token = "wangtianze";
 
 public static boolean checkSignature(String signature,String timestamp,String nonce){
  //1.將token,timestamp,nonce三個(gè)參數(shù)進(jìn)行排序
  String[] str = new String[]{token,timestamp,nonce};
  Arrays.sort(str);
  
  //2.將三個(gè)參數(shù)字符串拼接成一個(gè)字符串
  StringBuilder buff = new StringBuilder();
  for(int i=0;i>>4) & 0X0F];
  temp[1] = digit[mByte & 0X0F];
  
  String str = new String(temp);
  return str;
 }
}