diff --git a/pom.xml b/pom.xml
index 5057218..74ffc02 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
     <groupId>tech.ynfy</groupId>
     <artifactId>ynfy-tool-httpconnect</artifactId>
     <name>${project.groupId}:${project.artifactId}</name>
-    <version>1.1.9</version>
+    <version>1.1.10</version>
     <description>A Http Util for Java</description>
     <url>https://github.com/ynfy-tech/ynfy-tool-httpconnect</url>
 
diff --git a/src/main/java/http/InitUtil.java b/src/main/java/http/InitUtil.java
index 6a71123..178a803 100644
--- a/src/main/java/http/InitUtil.java
+++ b/src/main/java/http/InitUtil.java
@@ -174,7 +174,9 @@ protected <T> String appendGetUrlParam(String url, T paramObj) {
             if (String.class.equals(paramObj.getClass())) {
                 throw new IllegalArgumentException("Param can't be string! ");
             }
-            urlNameString.append("?");
+            
+            urlNameString.append(url.contains("?") ? "&" : "?"); // 使用三元运算符来决定是追加 '&' 还是 '?'
+            
             Class c = paramObj.getClass();
             Field[] fields = c.getDeclaredFields();
             for (Field field : fields) {
@@ -195,6 +197,15 @@ protected <T> String appendGetUrlParam(String url, T paramObj) {
                 if (filedValue instanceof Collection) {
                     Collection collection = (Collection) filedValue;
                     for (Object s : collection) {
+                        
+                        if (s == null) {
+                            continue;
+                        }
+                        
+                        if (!String.class.equals(s.getClass())) {
+                            throw new IllegalArgumentException("List param should be string! ");
+                        }
+                        
                         String filedValueStr = URLEncoder.encode((String) s, StandardCharsets.UTF_8);
                         urlNameString.append(fieldName).append("=").append(filedValueStr).append("&");
                     }