Request verification for secondary development WeChat

This article describes in detail the first article of Java secondary development. The Java request verification function has some reference value, interested friends can refer to this article for details about the first article of Java secondary development. The Java request verification function has some reference value, for more information, see

Prepare to use Java for a secondary development project. write the process here.

Article 1: perform request verification

Import Warehouse to: servlet-api.jar

Step 1:Create com. wtz. service and LoginServlet. java

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 8:11:32 on January 1, April 17, 2017 *
Version: 1.0
*
Description: request verification class
*/Public class LoginServlet extends HttpServlet {@ Override protected void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {System. out. println ("get request ...... "); // 1. string signature = request. getParameter ("signature"); // 2. obtain the timestamp String timestamp = request. getParameter ("timestamp"); // 3. obtain the random number String nonce = request. getParameter ("nonce"); // 4. obtain the random String echostr = request. getParameter ("echostr"); System. out. println ("The encrypted string for obtaining the signature:" + signature); System. out. println ("get timestamp information:" + timestamp); System. out. println ("random number obtained:" + nonce); System. out. println ("get random string:" + echostr); PrintWriter out = response. getWriter (); // if the content of the echostr parameter is returned after the request is confirmed successfully, the access takes effect and becomes a developer. Otherwise, if (ValidationUtil. checkSignature (signature, timestamp, nonce) {out. print (echostr);} out. close (); out = null ;}}

Step 2:Create a package com. wtz. util and a new class Validation. java

Package com. wtz. util; import java. security. messageDigest; import java. security. noSuchAlgorithmException; import java. util. arrays;/*** @ author wangtianze QQ: 864620012 * @ date 8:35:57 on January 1, April 17, 2017 *
Version: 1.0
*
Description: request verification tool
*/Public class ValidationUtil {private static String token = "wangtianze"; public static boolean checkSignature (String signature, String timestamp, String nonce) {// 1. sort the token, timestamp, and nonce parameters. String [] str = new String [] {token, timestamp, nonce}; Arrays. sort (str); // 2. concatenates the three parameter strings into a string StringBuilder buff = new StringBuilder (); for (int I = 0; I
 
  
>>4) & 0X0F]; temp [1] = digit [mByte & 0X0F]; String str = new String (temp); return str ;}}
 

This was done on the first day, and the request verification function was completed.