diff --git a/common/src/main/java/com/jeesite/common/lang/ObjectUtils.java b/common/src/main/java/com/jeesite/common/lang/ObjectUtils.java
index 010ef2e9..b2e61fc4 100644
--- a/common/src/main/java/com/jeesite/common/lang/ObjectUtils.java
+++ b/common/src/main/java/com/jeesite/common/lang/ObjectUtils.java
@@ -122,7 +122,7 @@ public class ObjectUtils extends org.apache.commons.lang3.ObjectUtils {
 	 */
 	public static String toStringIgnoreNull(final Object val, String defaultVal) {
 		String str = ObjectUtils.toString(val);
-		return !"".equals(str) && !"null".equals(str.trim().toLowerCase()) ? str : defaultVal;
+		return !"".equals(str) && !"null".equalsIgnoreCase(str.trim()) ? str : defaultVal;
 	}
 
 	/**