c3p0 获取数据源

getDataSourcec3p0Resource

    private static void f3Resource() throws Exception {
        Connection conn = getDataSourcec3p0Resource().getConnection();
        int res = executeUpdate(conn);
        System.out.println(res);
    }

    private static DataSource getDataSourcec3p0Resource() throws Exception {
        ComboPooledDataSource c3p0 = new ComboPooledDataSource("test");
        return  c3p0;
    }

    private static void f3() throws Exception {
        Connection conn = getDataSourceC3p0().getConnection();
        int res = executeUpdate(conn);
        System.out.println(res);
    }

    public static DataSource getDataSourceC3p0() throws Exception {
        ComboPooledDataSource c3p0 = new ComboPooledDataSource();
        c3p0.setDriverClass("com.mysql.jdbc.Driver");
        c3p0.setJdbcUrl("jdbc:mysql://localhost:3306/jdbc");
        c3p0.setUser("root");
        c3p0.setPassword("root1010");
        return c3p0;
    }
    
    private static int executeUpdate(Connection conn) {
        String sql = "UPDATE `user` set money=666 where id=?";
        Object[] objs = new Object[]{"1"};
        return JdbcUtils.executeUpdate(conn, sql, objs);
    }

11

<?xml version="1.0" encoding="UTF-8"?>
<c3p0-config>
    <!-- 默认配置，如果没有指定则使用这个配置 -->
    <default-config>
        <property name="user">root</property>
        <property name="password">xxx</property>
        <property name="jdbcUrl">jdbc:mysql://localhost:3306/jdbc</property>
        <property name="driverClass">com.mysql.jdbc.Driver</property>
        <property name="checkoutTimeout">30000</property>
        <property name="idleConnectionTestPeriod">30</property>
        <property name="initialPoolSize">3</property>
        <property name="maxIdleTime">30</property>
        <property name="maxPoolSize">100</property>
        <property name="minPoolSize">2</property>
        <property name="maxStatements">200</property>
    </default-config>
    <!-- 命名的配置,可以通过方法调用实现 -->
    <named-config name="test">
        <property name="user">root</property>
        <property name="password">xxx</property>
        <property name="jdbcUrl">jdbc:mysql://localhost:3306/jdbc</property>
        <property name="driverClass">com.mysql.jdbc.Driver</property>
        <!-- 如果池中数据连接不够时一次增长多少个 -->
        <property name="acquireIncrement">5</property>
        <!-- 初始化数据库连接池时连接的数量 -->
        <property name="initialPoolSize">20</property>
        <!-- 数据库连接池中的最大的数据库连接数 -->
        <property name="maxPoolSize">25</property>
        <!-- 数据库连接池中的最小的数据库连接数 -->
        <property name="minPoolSize">5</property>
    </named-config>
</c3p0-config>