diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/SubscribeTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/SubscribeTest.java
index 07b43d1227a55538026e3c7d8d35d1e6f5c9a416..0a71c77d1d9dc718cc029c6a0b11ed63cd3034c1 100644
--- a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/SubscribeTest.java
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/SubscribeTest.java
@@ -10,8 +10,6 @@ import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.Properties;
 
-import static org.junit.Assert.assertTrue;
-
 public class SubscribeTest extends BaseTest {
     Connection connection = null;
     Statement statement = null;
diff --git a/tests/examples/JDBC/JDBCDemo/pom.xml b/tests/examples/JDBC/JDBCDemo/pom.xml
index f0234f2bd762bd56fa0668af0d2b345d25320fea..92d757edfdea304084b5971613da231db2b9daef 100644
--- a/tests/examples/JDBC/JDBCDemo/pom.xml
+++ b/tests/examples/JDBC/JDBCDemo/pom.xml
@@ -9,21 +9,20 @@
     <version>1.0-SNAPSHOT</version>
     <packaging>jar</packaging>
     <build>
-        <pluginManagement>
-            <plugins>
-                <plugin>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-plugins</artifactId>
-                    <version>30</version>
-                </plugin>
-                <plugin>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-assembly-plugin</artifactId>
-                    <version>3.0.0</version>
-                </plugin>
-            </plugins>
-        </pluginManagement>
+
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-plugins</artifactId>
+                <version>30</version>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <version>3.0.0</version>
+            </plugin>
+
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-assembly-plugin</artifactId>
@@ -48,6 +47,7 @@
                     </execution>
                 </executions>
             </plugin>
+
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
diff --git a/tests/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JDBCConnectorChecker.java b/tests/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JDBCConnectorChecker.java
new file mode 100644
index 0000000000000000000000000000000000000000..1e801bc65894ef437ee41d692f9ef725b4f639ef
--- /dev/null
+++ b/tests/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JDBCConnectorChecker.java
@@ -0,0 +1,174 @@
+package com.taosdata.example;
+
+import com.taosdata.jdbc.TSDBDriver;
+
+import java.sql.*;
+import java.util.Properties;
+
+public class JDBCConnectorChecker {
+    private static String host;
+    private static String dbName = "test";
+    private static String tbName = "weather";
+    private Connection connection;
+
+
+    /**
+     * get connection
+     **/
+    private void init() {
+        try {
+            Class.forName("com.taosdata.jdbc.TSDBDriver");
+            Properties properties = new Properties();
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_HOST, host);
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+            System.out.println("get connection starting...");
+            connection = DriverManager.getConnection("jdbc:TAOS://" + host + ":0/", properties);
+            if (connection != null)
+                System.out.println("[ OK ] Connection established.");
+        } catch (ClassNotFoundException | SQLException e) {
+            throw new RuntimeException("connection failed: " + host);
+        }
+    }
+
+    /**
+     * create database
+     */
+    private void createDatabase() {
+        String sql = "create database if not exists " + dbName;
+        exuete(sql);
+    }
+
+    /**
+     * use database
+     */
+    private void useDatabase() {
+        String sql = "use " + dbName;
+        exuete(sql);
+    }
+
+    /**
+     * select
+     */
+    private void checkSelect() {
+        final String sql = "select * from test.weather";
+        executeQuery(sql);
+    }
+
+    private void executeQuery(String sql) {
+        try (Statement statement = connection.createStatement()) {
+            long start = System.currentTimeMillis();
+            ResultSet resultSet = statement.executeQuery(sql);
+            long end = System.currentTimeMillis();
+            printSql(sql, true, (end - start));
+            printResult(resultSet);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void printResult(ResultSet resultSet) throws SQLException {
+        ResultSetMetaData metaData = resultSet.getMetaData();
+        while (resultSet.next()) {
+            for (int i = 1; i <= metaData.getColumnCount(); i++) {
+                String columnLabel = metaData.getColumnLabel(i);
+                String value = resultSet.getString(i);
+                System.out.printf("%s: %s\t", columnLabel, value);
+            }
+            System.out.println();
+        }
+    }
+
+    private String formatString(String str) {
+        StringBuilder sb = new StringBuilder();
+        int blankCnt = (26 - str.length()) / 2;
+        for (int j = 0; j < blankCnt; j++)
+            sb.append(" ");
+        sb.append(str);
+        for (int j = 0; j < blankCnt; j++)
+            sb.append(" ");
+        sb.append("|");
+        return sb.toString();
+    }
+
+
+    /**
+     * insert
+     */
+    private void checkInsert() {
+        final String sql = "insert into test.weather (ts, temperature, humidity) values(now, 20.5, 34)";
+        exuete(sql);
+    }
+
+    /**
+     * create table
+     */
+    private void createTable() {
+        final String sql = "create table if not exists " + dbName + "." + tbName + " (ts timestamp, temperature float, humidity int)";
+        exuete(sql);
+    }
+
+    private final void printSql(String sql, boolean succeed, long cost) {
+        System.out.println("[ " + (succeed ? "OK" : "ERROR!") + " ] time cost: " + cost + " ms, execute statement ====> " + sql);
+    }
+
+    private final void exuete(String sql) {
+        try (Statement statement = connection.createStatement()) {
+            long start = System.currentTimeMillis();
+            boolean execute = statement.execute(sql);
+            long end = System.currentTimeMillis();
+            printSql(sql, execute, (end - start));
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void close() {
+        try {
+            if (connection != null) {
+                this.connection.close();
+                System.out.println("connection closed.");
+            }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void checkDropTable() {
+        final String sql = "drop table if exists " + dbName + "." + tbName + "";
+        exuete(sql);
+    }
+
+    public static void main(String[] args) {
+        for (int i = 0; i < args.length; i++) {
+            if ("-host".equalsIgnoreCase(args[i]) && i < args.length - 1) {
+                host = args[++i];
+            }
+            if ("-db".equalsIgnoreCase(args[i]) && i < args.length - 1) {
+                dbName = args[++i];
+            }
+            if ("-t".equalsIgnoreCase(args[i]) && i < args.length - 1) {
+                tbName = args[++i];
+            }
+        }
+
+        if (host == null) {
+            System.out.println("Usage: java -jar JDBCConnectorChecker.jar -host <hostname>");
+            return;
+        }
+
+        JDBCConnectorChecker checker = new JDBCConnectorChecker();
+        checker.init();
+        checker.createDatabase();
+        checker.useDatabase();
+        checker.checkDropTable();
+        checker.createTable();
+        checker.checkInsert();
+        checker.checkSelect();
+        checker.checkDropTable();
+        checker.close();
+    }
+
+
+}