diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulResultSetMetaData.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulResultSetMetaData.java
index 9252ed23a625830f28e3336ba05b2c3f51fbafe8..44a02f486b22063cabb8950c21d3a9f55bfc70c8 100644
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulResultSetMetaData.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulResultSetMetaData.java
@@ -152,7 +152,6 @@ public class RestfulResultSetMetaData implements ResultSetMetaData {
                 return java.sql.Types.NCHAR;
         }
         throw new SQLException(TSDBConstants.INVALID_VARIABLES);
-
     }
 
     @Override
diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/RestfulResultSetMetaDataTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/RestfulResultSetMetaDataTest.java
index 80bd9087bf0bfcf0d4a59e72374e8f1078c78194..0af6aa431ca71a588efb820e924dcbfa80068821 100644
--- a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/RestfulResultSetMetaDataTest.java
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/RestfulResultSetMetaDataTest.java
@@ -7,8 +7,6 @@ import org.junit.Test;
 
 import java.sql.*;
 
-import static org.junit.Assert.*;
-
 public class RestfulResultSetMetaDataTest {
 
     //    private static final String host = "127.0.0.1";