change

tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/dao/DatabaseMapperImpl.java

 package com.taosdata.taosdemo.dao;
 
 import com.taosdata.taosdemo.utils.SqlSpeller;
+import org.apache.log4j.Logger;
 import org.springframework.jdbc.core.JdbcTemplate;
 
 import javax.sql.DataSource;
 import java.util.Map;
 
 public class DatabaseMapperImpl implements DatabaseMapper {
+    private static final Logger logger = Logger.getLogger(DatabaseMapperImpl.class);
 
     private final JdbcTemplate jdbcTemplate;
 
@@ -17,21 +19,29 @@ public class DatabaseMapperImpl implements DatabaseMapper {
 
     @Override
     public void createDatabase(String dbname) {
-        jdbcTemplate.execute("create database if not exists " + dbname);
+        String sql = "create database if not exists " + dbname;
+        jdbcTemplate.execute(sql);
+        logger.info("SQL >>> " + sql);
     }
 
     @Override
     public void dropDatabase(String dbname) {
-        jdbcTemplate.update("drop database if exists " + dbname);
+        String sql = "drop database if exists " + dbname;
+        jdbcTemplate.update(sql);
+        logger.info("SQL >>> " + sql);
     }
 
     @Override
     public void createDatabaseWithParameters(Map<String, String> map) {
-        jdbcTemplate.execute(SqlSpeller.createDatabase(map));
+        String sql = SqlSpeller.createDatabase(map);
+        jdbcTemplate.execute(sql);
+        logger.info("SQL >>> " + sql);
     }
 
     @Override
     public void useDatabase(String dbname) {
-        jdbcTemplate.execute("use " + dbname);
+        String sql = "use " + dbname;
+        jdbcTemplate.execute(sql);
+        logger.info("SQL >>> " + sql);
     }
 }