请问你这个问题解决了吗?我们也遇到相同的问题. 检查证书是没有问题的.

申明:借鉴于 https://blog.csdn.net/wangjia55/article/details/80623271 这位大佬的代码,自己重新封装了工具类 步骤 1: 引入解密相关pom依赖 <dependency> <groupId>org.codehaus.xfire</groupId> <artifactId>xfire-core</artifactId> <version>1.2.6</version> </dependency> <dependency> <groupId>org.bouncycastle</groupId> <artifactId>bcprov-jdk16</artifactId> <version>1.46</version> </dependency> 步骤 2: 详见代码 package com.qhg.wxproject.wxapi.utils; import com.alibaba.fastjson.JSONObject; import org.bouncycastle.jce.provider.BouncyCastleProvider; import org.codehaus.xfire.util.Base64; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.NoSuchPaddingException; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.io.UnsupportedEncodingException; import java.security.*; import java.security.spec.InvalidParameterSpecException; import java.util.Arrays; /** * 项目名：wxproject * 包 名：com.qhg.wxproject.wxapi.utils * 创建者：乔回国 * 创建时间：2020/10/20 23:32 * 描述： */ public class WxBizDataCrypt { private String appId; private String sessionKey; public WxBizDataCrypt(String appId, String sessionKey) { this.appId = appId; this.sessionKey = sessionKey; } /** * 微信数据解密 * * @param encryptedData * @param iv * @return */ public JSONObject decryptData(String encryptedData, String iv) { // 被加密的数据 byte[] dataByte = Base64.decode(encryptedData); // 加密秘钥 byte[] keyByte = Base64.decode(sessionKey); // 偏移量 byte[] ivByte = Base64.decode(iv); try { // 如果密钥不足16位，那么就补足. 这个if 中的内容很重要 int base = 16; if (keyByte.length % base != 0) { int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0); byte[] temp = new byte[groups * base]; Arrays.fill(temp, (byte) 0); System.arraycopy(keyByte, 0, temp, 0, keyByte.length); keyByte = temp; } // 初始化 Security.addProvider(new BouncyCastleProvider()); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC"); SecretKeySpec spec = new SecretKeySpec(keyByte, "AES"); AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES"); parameters.init(new IvParameterSpec(ivByte)); cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化 byte[] resultByte = cipher.doFinal(dataByte); if (null != resultByte && resultByte.length > 0) { String result = new String(resultByte, "UTF-8"); return JSONObject.parseObject(result); } } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (NoSuchPaddingException e) { e.printStackTrace(); } catch (InvalidParameterSpecException e) { e.printStackTrace(); } catch (IllegalBlockSizeException e) { e.printStackTrace(); } catch (BadPaddingException e) { e.printStackTrace(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (InvalidKeyException e) { e.printStackTrace(); } catch (InvalidAlgorithmParameterException e) { e.printStackTrace(); } catch (NoSuchProviderException e) { e.printStackTrace(); } return null; } private WxBizDataCrypt() { } } 步骤 3: demo /** * 数据解密 * * @param sessionKey * @param encryptedData * @param iv * @return */ public JSONObject decryptData(String sessionKey, String encryptedData, String iv) { WxBizDataCrypt wxBizDataCrypt = new WxBizDataCrypt(WxBaseConf.APP_ID, sessionKey); return wxBizDataCrypt.decryptData(encryptedData, iv); }