德鲁伊工具类与properties文件

private static DataSource pool;
static {
Properties pro = new Properties();
InputStream is = DBUTil.class.getClassLoader().getResourceAsStream("db.properties");
try {
pro.load(is);
pool = DruidDataSourceFactory.createDataSource(pro);
} catch (Exception e) {
e.printStackTrace();
}
}
public static DataSource getDataSource(){
return pool;
}
public static Connection getConnection() throws SQLException {
return pool.getConnection();
}