diff --git a/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/config/sign/util/SignUtil.java b/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/config/sign/util/SignUtil.java
index f2e58f61..fa2ca0fb 100644
--- a/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/config/sign/util/SignUtil.java
+++ b/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/config/sign/util/SignUtil.java
@@ -1,5 +1,6 @@
 package com.jero.config.sign.util;
 
+import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
 import lombok.extern.slf4j.Slf4j;
 import com.jero.common.exception.JeroBootException;
@@ -8,18 +9,24 @@ import com.jero.common.util.oConvertUtils;
 import com.jero.config.StaticConfig;
 import org.springframework.util.DigestUtils;
 import org.springframework.util.StringUtils;
+import org.springframework.web.bind.annotation.PathVariable;
 
 import java.util.SortedMap;
 
 /**
  * 签名工具类
- * 
+ *
  * @author jeecg
  * @date 20210621
  */
 @Slf4j
 public class SignUtil {
-    public static final String xPathVariable = "x-path-variable";
+
+    private SignUtil(){
+
+    }
+
+    public static final String X_PATH_VARIABLE = "x-path-variable";
 
     /**
      * @param params
@@ -44,7 +51,7 @@ public class SignUtil {
     public static String getParamsSign(SortedMap<String, String> params) {
         //去掉 Url 里的时间戳
         params.remove("_t");
-        String paramsJsonStr = JSONObject.toJSONString(params);
+        String paramsJsonStr = JSON.toJSONString(params);
         log.info("Param paramsJsonStr : {}", paramsJsonStr);
         StaticConfig staticConfig = SpringContextUtils.getBean(StaticConfig.class);
         String signatureSecret = staticConfig.getSignatureSecret();
@@ -53,4 +60,4 @@ public class SignUtil {
         }
         return DigestUtils.md5DigestAsHex((paramsJsonStr + signatureSecret).getBytes()).toUpperCase();
     }
-}
\ No newline at end of file
+}