详细解读Druid数据库连接池的使用

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/sd?useSSL=false&useServerPrepStmts=true
username=root
password=root
# 初始连接数
initialSize=5
# 最大连接数
maxActive=10
# 最大等待时间
maxWait=3000

public static void main(String[] args) throws Exception {
        //1.导入jar包
        //2.定义配置文件
        //3. 加载配置文件
        Properties prop=new Properties();
        prop.load(new FileInputStream("C:\\Users\\斯文\\Desktop\\Java\\demo\\index\\src\\druid.properties"));

        //4. 获取连接池对象
        DataSource dataSource= DruidDataSourceFactory.createDataSource(prop);

        //5. 获取数据库连接 Connection
        Connection conn=dataSource.getConnection();

        //6.操作数据库
        String sql = "select * from st";
        Statement stmt=conn.createStatement();
        ResultSet rs = stmt.executeQuery(sql);
        while (rs.next()) {
            int id = rs.getInt("id");
            String name = rs.getString("name");
            int age = rs.getInt("age");
            System.out.println(id + " " + name + "    " + age);
        }

    }