diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/utils/encrypt/EncryptUtil.java b/ruoyi-common/src/main/java/com/ruoyi/common/utils/encrypt/EncryptUtil.java
new file mode 100644
index 0000000..875b68e
--- /dev/null
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/utils/encrypt/EncryptUtil.java
@@ -0,0 +1,134 @@
+package com.ruoyi.common.utils.encrypt;
+
+import cn.hutool.json.JSON;
+import cn.hutool.json.JSONUtil;
+import com.ruoyi.common.utils.StringUtils;
+import org.apache.commons.codec.binary.Base64;
+
+import javax.crypto.Cipher;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+
+public class EncryptUtil {
+
+    private static final String ALGORITHM = "AES";
+    private static final String TRANSFORMATION = "AES/CBC/PKCS5Padding";
+
+    public static void main(String[] args) {
+        String appId = "cloud-9793ee8a8c3d47b8871007ffc4128502";
+        String appSecret = "Yi+NACK70UPg8rFvsnnfBUq1wcLD4nm6ilC4II/4C4k=";
+        String generatedIv = generateAppIV(appId);
+        String generatedKey = generateAppKey(appId, appSecret);
+
+        String data = "n+Rq0Y+quYHa9uL+EpWbuw==";
+        String str =  decrypt(data, generatedIv, generatedKey);
+        System.err.println(str);
+    }
+
+
+    private static String generateAppIV(String appId) {
+        try {
+            MessageDigest md = MessageDigest.getInstance("MD5");
+            byte[] hashBytes = md.digest(appId.getBytes("UTF-8"));
+            // 直接使用字节数组转换，确保精确的16字节
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < 16; i++) {
+                String hex = Integer.toHexString(0xff & hashBytes[i]);
+                if (hex.length() == 1) {
+                    sb.append('0');
+                }
+                sb.append(hex);
+            }
+            return sb.toString().substring(0, 16); // 确保正好16个字符
+        } catch (Exception e) {
+            throw new RuntimeException("IV生成失败", e);
+        }
+    }
+
+    private static String generateAppKey(String appId, String appSecret) {
+        try {
+            String combinedKey = appId + appSecret;
+            MessageDigest md = MessageDigest.getInstance("SHA-256");
+            byte[] hashBytes = md.digest(combinedKey.getBytes("UTF-8"));
+            // 取前16字节作为AES密钥
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < 16; i++) {
+                sb.append(Integer.toHexString((hashBytes[i] & 0xFF) | 0x100).substring(1, 3));
+            }
+            return sb.toString().substring(0, 16); // AES-128需要16字符密钥
+        } catch (Exception e) {
+            throw new RuntimeException("密钥生成失败", e);
+        }
+    }
+
+    public static String decrypt(String content, String iv, String key) {if(StringUtils.isEmpty(content)) {return "";}
+        iv = getIv( iv);
+        try {
+            byte[] decoded = Base64.decodeBase64(content);
+            byte[] decrypted = AES_CBC_Decrypt(decoded, iv, AES_normalizeKey(key));
+            String result = new String(decrypted, StandardCharsets.UTF_8);
+
+            // 清理可能的填充字符
+            result = result.trim();
+            if (result.endsWith("\0")) {
+                result = result.replaceAll("\\\\0+$", "");
+            }
+
+            // 处理JSON格式
+            String cleanResult = result.replaceAll("\"", "");
+            if (cleanResult.startsWith("{") && cleanResult.endsWith("}")) {
+                JSON parse = JSONUtil.parse(cleanResult);
+                return String.valueOf(parse);
+            } else {
+                return result;
+            }
+        } catch (Exception e) {
+            return "";
+        }
+    }
+
+    private static String getIv(String iv) {
+        return generateIV(iv);
+    }
+
+    private static String generateIV(String iv) {
+        try {
+            MessageDigest md = MessageDigest.getInstance("MD5");
+            byte[] hashBytes = md.digest(iv.getBytes("UTF-8"));
+            // 直接使用字节数组转换，确保精确的16字节
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < 16; i++) {
+                String hex = Integer.toHexString(0xff & hashBytes[i]);
+                if (hex.length() == 1) {
+                    sb.append('0');
+                }
+                sb.append(hex);
+            }
+            return sb.toString().substring(0, 16); // 确保正好16个字符
+        } catch (Exception e) {
+            throw new RuntimeException("IV生成失败", e);
+        }
+    }
+
+    /**
+     * AES CBC 解密
+     */
+    private static byte[] AES_CBC_Decrypt(byte[] content, String iv, String key) throws Exception {
+        SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), ALGORITHM);
+        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
+        IvParameterSpec ivSpec = new IvParameterSpec(iv.getBytes(StandardCharsets.UTF_8));
+        cipher.init(Cipher.DECRYPT_MODE, secretKey, ivSpec);
+        return cipher.doFinal(content);
+    }
+
+
+    /**
+     * 规范化密钥长度为16位（AES-128）
+     */
+    private static String AES_normalizeKey(String key) {
+        return key;
+    }
+
+}