C3P0连接数据库的两种方式

<?xml version="1.0" encoding="UTF-8"?>
<c3p0-config>
    <default-config>
        <property name="driverClass">com.mysql.jdbc.Driver</property>
        <property name="jdbcUrl">jdbc:mysql://localhost:3306/mydb?characterEncoding=GBK</property>
        <property name="user">root</property>
        <property name="password"></property>
        
    </default-config>
</c3p0-config>

public static void main(String[] args) throws Exception{        
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        DataSource ds = (DataSource) context.getBean("dataSource");        
        Connection conn =  ds.getConnection();        
        conn.close();
    }

public static void main00(String[] args) throws Exception {
        ComboPooledDataSource ds = new ComboPooledDataSource();
　　　　 \\依次设置连接数据库的各项属性
        ds.setDriverClass("com.mysql.jdbc.Driver");
        ds.setJdbcUrl("jdbc:mysql://localhost:3306/mydb");
        ds.setUser("root");
        ds.setPassword("");
        ds.setMinPoolSize(5);
        ds.setMaxPoolSize(20);        
        Connection conn =  ds.getConnection();        
        conn.close();            
    }