Solution to TOKEN verification failure in WeChat public account development

When developing WeChat public accounts, we often need to perform TOKEN verification to ensure effective communication with the WeChat server. However, sometimes you may encounter TOKEN verification failure. This article details how to solve this problem and provides corresponding source code examples.

1. Verify URL and Token matching
   First, ensure that the URL configured in the WeChat official account backend is consistent with the URL configured on your server. At the same time, you also need to ensure that the Token used in the server-side code is consistent with the configured Token. The following is a sample code snippet for verifying Token matching:

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import