diff --git a/src/connector/jdbc/pom.xml b/src/connector/jdbc/pom.xml
index da0c5b12d4be3e77c1797e39da221cc4241d7d15..0fed63fc802e5b5c975b18d45f815d9931717fd4 100755
--- a/src/connector/jdbc/pom.xml
+++ b/src/connector/jdbc/pom.xml
@@ -48,11 +48,6 @@
         </exclusion>
       </exclusions>
     </dependency>
-    <dependency>
-      <groupId>org.apache.commons</groupId>
-      <artifactId>commons-lang3</artifactId>
-      <version>${commons-lang3.version}</version>
-    </dependency>    
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBDriver.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBDriver.java
index 02d642d6430d8c2dccaa9be03258861ff051a374..e25bd64c73c01709ba34fafbdde7769aae78e6c9 100755
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBDriver.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBDriver.java
@@ -14,8 +14,6 @@
  *****************************************************************************/
 package com.taosdata.jdbc;
 
-import org.apache.commons.lang3.StringUtils;
-
 import java.sql.*;
 import java.util.Properties;
 import java.util.logging.Logger;
@@ -42,9 +40,8 @@ import java.util.logging.Logger;
 public class TSDBDriver implements java.sql.Driver {
 
 	@Deprecated
-	private static final String URL_PREFIX1 = "jdbc:TSDB://";
-
-	private static final String URL_PREFIX = "jdbc:TAOS://";
+	private static final String URL_PREFIX1 = "jdbc:tsdb://";
+	private static final String URL_PREFIX  = "jdbc:taos://";
 
 	/**
 	 * Key used to retrieve the database value from the properties instance passed
@@ -188,7 +185,7 @@ public class TSDBDriver implements java.sql.Driver {
 	}
 
 	public boolean acceptsURL(String url) throws SQLException {
-		return StringUtils.isNotBlank(url) && url.startsWith(URL_PREFIX);
+		return (url != null && url.length() > 0 && url.trim().length() > 0) && url.toLowerCase().startsWith(URL_PREFIX);
 	}
 
 	public DriverPropertyInfo[] getPropertyInfo(String url, Properties info) throws SQLException {
@@ -238,7 +235,8 @@ public class TSDBDriver implements java.sql.Driver {
 			return null;
 		}
 
-		if (!StringUtils.startsWithIgnoreCase(url, URL_PREFIX) && !StringUtils.startsWithIgnoreCase(url, URL_PREFIX1)) {
+        String lowerUrl = url.toLowerCase();
+        if (!lowerUrl.startsWith(URL_PREFIX) && !lowerUrl.startsWith(URL_PREFIX1)) {
 			return null;
 		}