diff --git a/src/main/java/com/jeesite/modules/util/vir/AiStringUtil.java b/src/main/java/com/jeesite/modules/util/vir/AiStringUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..c125b982a61bbff97eabe8a6b2cf16c57bfa3621
--- /dev/null
+++ b/src/main/java/com/jeesite/modules/util/vir/AiStringUtil.java
@@ -0,0 +1,22 @@
+package com.vir.ai.admin.utils;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+@Slf4j
+public class AiStringUtil {
+
+	private static final Pattern NUMBER_PATTERN = Pattern.compile("-?\\d+(\\.\\d+)?");
+
+	private AiStringUtil() {
+	}
+	
+	
+	public static boolean isNull(String str) {
+		return str == null || str.trim().length() == 0;
+	} 
+}