diff --git a/src/connector/jdbc/pom.xml b/src/connector/jdbc/pom.xml
index 4d647669e4beaae39373bc2585c42f12e9c177ba..c2a086347ad1aef6fcd2365e9102f4f0e5e024ea 100755
--- a/src/connector/jdbc/pom.xml
+++ b/src/connector/jdbc/pom.xml
@@ -34,23 +34,9 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
         <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
-        <commons-logging.version>1.1.2</commons-logging.version>
-        <commons-lang3.version>3.5</commons-lang3.version>
         <maven.test.jvmargs></maven.test.jvmargs>
     </properties>
     <dependencies>
-        <dependency>
-            <groupId>commons-logging</groupId>
-            <artifactId>commons-logging</artifactId>
-            <version>${commons-logging.version}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>*</groupId>
-                    <artifactId>*</artifactId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
@@ -64,23 +50,12 @@
             <artifactId>httpclient</artifactId>
             <version>4.5.8</version>
         </dependency>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-lang3</artifactId>
-            <version>3.9</version>
-        </dependency>
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
             <version>1.2.58</version>
         </dependency>
 
-        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-dbcp2 -->
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-dbcp2</artifactId>
-            <version>2.7.0</version>
-        </dependency>
     </dependencies>
 
     <build>
diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulDriver.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulDriver.java
index a8a92e412303b7e5ef871b86a9788c1fa774de0e..3e1eea2fbf9d37fd6415cbc467f5ceb6479f5bae 100644
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulDriver.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulDriver.java
@@ -5,7 +5,7 @@ import com.alibaba.fastjson.JSONObject;
 import com.taosdata.jdbc.AbstractDriver;
 import com.taosdata.jdbc.TSDBConstants;
 import com.taosdata.jdbc.TSDBDriver;
-import com.taosdata.jdbc.rs.util.HttpClientPoolUtil;
+import com.taosdata.jdbc.utils.HttpClientPoolUtil;
 
 import java.sql.*;
 import java.util.Properties;
diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulStatement.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulStatement.java
index f0c24375e6dbaaaa9fbc49b742d6ad16a271fd86..8d67586be257fab2bf516f8aecad825e1dfdc02e 100644
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulStatement.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulStatement.java
@@ -7,7 +7,7 @@ import com.taosdata.jdbc.AbstractStatement;
 import com.taosdata.jdbc.TSDBConstants;
 import com.taosdata.jdbc.TSDBError;
 import com.taosdata.jdbc.TSDBErrorNumbers;
-import com.taosdata.jdbc.rs.util.HttpClientPoolUtil;
+import com.taosdata.jdbc.utils.HttpClientPoolUtil;
 import com.taosdata.jdbc.utils.SqlSyntaxValidator;
 
 import java.sql.*;
diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/util/HttpClientPoolUtil.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/HttpClientPoolUtil.java
similarity index 93%
rename from src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/util/HttpClientPoolUtil.java
rename to src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/HttpClientPoolUtil.java
index 9b1681ff948dc9257e7b775d947c598d9dc60378..5e2440fd1d0e551690c5f17fe60b30c1d4a377dc 100644
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/util/HttpClientPoolUtil.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/HttpClientPoolUtil.java
@@ -1,6 +1,5 @@
-package com.taosdata.jdbc.rs.util;
+package com.taosdata.jdbc.utils;
 
-import org.apache.commons.lang3.StringUtils;
 import org.apache.http.HeaderElement;
 import org.apache.http.HeaderElementIterator;
 import org.apache.http.HttpEntity;
@@ -39,7 +38,7 @@ public class HttpClientPoolUtil {
     /**
      * 初始化连接池
      */
-    public static synchronized void initPools() {
+    private static synchronized void initPools() {
         if (httpClient == null) {
             cm = new PoolingHttpClientConnectionManager();
             cm.setDefaultMaxPerRoute(count);
@@ -51,7 +50,7 @@ public class HttpClientPoolUtil {
     /**
      * Http connection keepAlive 设置
      */
-    public static ConnectionKeepAliveStrategy defaultStrategy = (response, context) -> {
+    private static ConnectionKeepAliveStrategy defaultStrategy = (response, context) -> {
         HeaderElementIterator it = new BasicHeaderElementIterator(response.headerIterator(HTTP.CONN_KEEP_ALIVE));
         int keepTime = Http_Default_Keep_Time * 1000;
         while (it.hasNext()) {
@@ -69,14 +68,6 @@ public class HttpClientPoolUtil {
         return keepTime;
     };
 
-    public static CloseableHttpClient getHttpClient() {
-        return httpClient;
-    }
-
-    public static PoolingHttpClientConnectionManager getHttpConnectionManager() {
-        return cm;
-    }
-
     /**
      * 执行http post请求
      * 默认采用Content-Type：application/json，Accept：application/json
@@ -95,8 +86,10 @@ public class HttpClientPoolUtil {
                 initPools();
             }
             method = (HttpEntityEnclosingRequestBase) getRequest(uri, HttpPost.METHOD_NAME, DEFAULT_CONTENT_TYPE, 0);
-            method.setHeader("Authorization", "Taosd " + token);
             method.setHeader("Content-Type", "text/plain");
+            method.setHeader("Connection", "keep-alive");
+            method.setHeader("Authorization", "Taosd " + token);
+
             method.setEntity(new StringEntity(data, Charset.forName("UTF-8")));
             HttpContext context = HttpClientContext.create();
             CloseableHttpResponse httpResponse = httpClient.execute(method, context);
@@ -131,7 +124,7 @@ public class HttpClientPoolUtil {
      * @return HttpRequestBase    返回类型
      * @author lisc
      */
-    public static HttpRequestBase getRequest(String uri, String methodName, String contentType, int timeout) {
+    private static HttpRequestBase getRequest(String uri, String methodName, String contentType, int timeout) {
         if (httpClient == null) {
             initPools();
         }
@@ -152,7 +145,7 @@ public class HttpClientPoolUtil {
             method = new HttpPost(uri);
         }
 
-        if (StringUtils.isBlank(contentType)) {
+        if (contentType == null || contentType.isEmpty() || contentType.replaceAll("\\s", "").isEmpty()) {
             contentType = DEFAULT_CONTENT_TYPE;
         }
         method.addHeader("Content-Type", contentType);
diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/AuthenticationTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/AuthenticationTest.java
index 11d4a143535d7e116d92875a6eb52b5bf7a5b6e0..aba591ba56146f44787aa7d38367d6a6aee594bd 100644
--- a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/AuthenticationTest.java
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/AuthenticationTest.java
@@ -3,14 +3,16 @@ package com.taosdata.jdbc.rs;
 import org.junit.Before;
 import org.junit.Test;
 
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
 import java.sql.*;
 
 public class AuthenticationTest {
 
     private static final String host = "127.0.0.1";
-    //    private static final String host = "master";
+    //        private static final String host = "master";
     private static final String user = "root";
-    private static final String password = "123456";
+    private static final String password = "taos?data";
     private Connection conn;
 
     @Test