Java. SQL. SQLException: validateConnection false solution record

Project scenario:

In the project Hutool-db-DSFactory - Data Pool and Multi Source Configuration
When changing the configuration file, mariadb successfully connects, but SQL server prompts an error
Each dependent version:

		<! --introduction Hutool dependency-- >
		<dependency>
			<groupId>cn.hutool</groupId>
			<artifactId>hutool-all</artifactId>
			<version>5.7.2</version>
		</dependency>
		<! --introduction mariadb driver dependency-- >
		<dependency>
			<groupId>org.mariadb.jdbc</groupId>
			<artifactId>mariadb-java-client</artifactId>
			<version>2.1.2</version>
		</dependency>
		<! --introduction druid dependency-- >
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.2.6</version>
		</dependency>
		<! --introduction sqlserver dependency-- >
		<dependency>
			<groupId>com.microsoft.sqlserver</groupId>
			<artifactId>mssql-jdbc</artifactId>
			<version>9.2.1.jre8</version>
		</dependency>

Problem description:

The error message is as follows:
Error com.alibaba. droid. tool. DruidDataSource - create connection SQLException Java. SQL. SQLException: validateConnection false.

16:49:59.835 [Druid-ConnectionPool-Create-329645619] ERROR com.alibaba.druid.pool.DruidDataSource - create connection SQLException, url: jdbc:sqlserver://192.168.205.131:1433;DatabaseName=testmssql, errorCode 0, state null
java.sql.SQLException: validateConnection false
  at com.alibaba.druid.pool.DruidAbstractDataSource.validateConnection(DruidAbstractDataSource.java:1418)
  at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1733)
  at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2801)
Caused by: java.lang.NullPointerException: null
  at com.microsoft.sqlserver.jdbc.SQLServerStatement.ensureSQLSyntax(SQLServerStatement.java:778)
  at com.microsoft.sqlserver.jdbc.SQLServerStatement.doExecuteStatement(SQLServerStatement.java:822)
  at com.microsoft.sqlserver.jdbc.SQLServerStatement$StmtExecCmd.doExecute(SQLServerStatement.java:767)
  at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:7418)
  at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:3272)
  at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:247)
  at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:222)
  at com.microsoft.sqlserver.jdbc.SQLServerStatement.execute(SQLServerStatement.java:743)
  at com.alibaba.druid.pool.vendor.MSSQLValidConnectionChecker.isValidConnection(MSSQLValidConnectionChecker.java:50)
  at com.alibaba.druid.pool.DruidAbstractDataSource.validateConnection(DruidAbstractDataSource.java:1398)
  ... 2 common frames omitted

Cause analysis:

Druid is not compatible with SQL Server drivers.

Solution:

Change the Druid version or SQL Server driver version
The final successful solution is to reduce the Druid version from 1.2.6 to 1.2.5.

<! --introduction druid dependency-- >
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.2.5</version>
		</dependency>