Spring手动创建c3p0和druid数据源

首先:配置xml文件

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.15</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.1</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>

创建c3p0数据源

//        连接
        ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
        comboPooledDataSource.setDriverClass("com.mysql.jdbc.Driver");
        comboPooledDataSource.setJdbcUrl("jdbc:mysql://localhost:3306/one");
        comboPooledDataSource.setUser("root");
        comboPooledDataSource.setPassword("admin123");

//        打印输出，测试连接效果
        Connection connection = comboPooledDataSource.getConnection();
        System.out.println(connection);
        connection.close();

创建druid数据源

 DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setDriverClassName("com.mysql.jdbc.Driver");
        druidDataSource.setUrl("jdbc:mysql://localhost:3306/one");
        druidDataSource.setUsername("root");
        druidDataSource.setPassword("admin123");
        //        打印输出，测试连接效果
        Connection connection = druidDataSource.getConnection();
        System.out.println(connection);
        connection.close();