捕获SQLException异常，并对常见的异常进行特殊处理：

private static Boolean sqlTest(DataSource dataSource) {
        try {
            dataSource.setLoginTimeout(5);
            dataSource.getConnection().getClientInfo();
        }catch (SQLException e) {
            if(e.getCause() instanceof CJCommunicationsException){
                //S100
                CJCommunicationsException cjCommunicationsException = (CJCommunicationsException)e.getCause();
                System.out.println("错误码："+cjCommunicationsException.getSQLState());
                System.out.println("错误信息："+cjCommunicationsException.getMessage());
            }else if(e.getCause() instanceof CJException){
                //42000，28000
                CJException cjException = (CJException)e.getCause();
                System.out.println("错误码："+cjException.getSQLState());
                System.out.println("错误信息："+cjException.getMessage());
            }
            e.printStackTrace();
            return false;
        }
        return true;
    }

S1000	jdbc-url错误	Could not create connection to database server. Attempted reconnect 3 times. Giving up.
42000	数据库名错误	Unknown database 'aaa22'
28000	用户名错误	Access denied for user 'root1'@'10.1.23.90' (using password: YES)
28000	密码错误	Access denied for user 'root'@'10.1.23.90' (using password: YES)