change

tests/examples/JDBC/connectionPools/src/main/java/com/taosdata/demo/pool/DruidPoolBuilder.java

 package com.taosdata.demo.pool;
 
 import com.alibaba.druid.pool.DruidDataSource;
-import com.alibaba.druid.pool.DruidDataSourceFactory;
 
 import javax.sql.DataSource;
-import java.util.Properties;
 
 public class DruidPoolBuilder {
 
-    public static DataSource getDataSource(String host, int poolSize) throws Exception {
+    public static DataSource getDataSource(String host, int poolSize) {
         final String url = "jdbc:TAOS://" + host + ":6030";
 
         DruidDataSource dataSource = new DruidDataSource();
@@ -18,9 +16,9 @@ public class DruidPoolBuilder {
         dataSource.setUsername("root");
         dataSource.setPassword("taosdata");
         // pool configurations
-        dataSource.setInitialSize(10);
-        dataSource.setMinIdle(10);
-        dataSource.setMaxActive(10);
+        dataSource.setInitialSize(poolSize);
+        dataSource.setMinIdle(poolSize);
+        dataSource.setMaxActive(poolSize);
         dataSource.setMaxWait(30000);
         dataSource.setValidationQuery("select server_status()");
         return dataSource;

tests/examples/JDBC/connectionPools/src/main/java/com/taosdata/demo/pool/HikariCpBuilder.java

@@ -15,8 +15,8 @@ public class HikariCpBuilder {
         config.setUsername("root");
         config.setPassword("taosdata");
         // pool configurations
-        config.setMinimumIdle(3);           //minimum number of idle connection
-        config.setMaximumPoolSize(10);      //maximum number of connection in the pool
+        config.setMinimumIdle(poolSize);           //minimum number of idle connection
+        config.setMaximumPoolSize(poolSize);      //maximum number of connection in the pool
         config.setConnectionTimeout(30000); //maximum wait milliseconds for get connection from pool
         config.setMaxLifetime(0);       // maximum life time for each connection
         config.setIdleTimeout(0);       // max idle time for recycle idle connection