c3p0數據庫連接池使用
阿新 • • 發佈：2018-02-07
combo pack .sql getname ack jar cast cti clas
package cn.itcast.test;
import java.beans.PropertyVetoException;
import java.sql.Connection;
import java.sql.SQLException;
import org.junit.Test;
import com.mchange.v2.c3p0.ComboPooledDataSource;
/**
* 演示c3p0連接池
* @author 國真
* 1. 需要兩個jar包：c3p0-0.9.2-pre1.jar 和 mchange-commons-0.2.jar
* 2. fun1()使用代碼來創建連接池對象
* fun2()使用默認配置，<default-config>
* fun3()使用命名配置，<name-config name="mysqlConfig">
*/
public class Demo {
@Test
public void fun1() throws PropertyVetoException, SQLException{
//創建連接池對象
ComboPooledDataSource ds = new ComboPooledDataSource();
//連接參數配置(四大參數)
ds.setDriverClass("com.mysql.jdbc.Driver");
ds.setJdbcUrl("jdbc:mysql://localhost:3306/test");
ds.setUser("root");
ds.setPassword("admin");
//池配置省略
//獲取連接
Connection connection = ds.getConnection();
System.out.println(connection.getClass().getName()); //返回connection對象所代表的具體對象的名稱
connection.close();
}
@Test
public void fun2() throws PropertyVetoException, SQLException{
//創建連接池對象
ComboPooledDataSource ds = new ComboPooledDataSource();
Connection connection = ds.getConnection();
System.out.println(connection.getClass().getName());
connection.close();
//關閉池連接
ds.close();
}
@Test
public void fun3() throws PropertyVetoException, SQLException{
//創建連接池對象
ComboPooledDataSource ds = new ComboPooledDataSource("mysqlConfig"); //若給出了參數，則該參數就是<name-config>的名稱
Connection connection = ds.getConnection();
System.out.println(connection.getClass().getName());
connection.close();
//關閉池連接
ds.close();
}
}
<?xml version="1.0" encoding="UTF-8" ?> <c3p0-config> <default-config> <property name="jdbcUrl">jdbc:mysql://localhost:3306/test</property> <property name="driverClass">com.mysql.jdbc.Driver</property> <property name="user">root</property> <property name="password">admin</property> <property name="acquireIncrement">3</property> <property name="initialPoolSize">10</property> <property name="minPoolSize">2</property> <property name="maxPoolSize">10</property> </default-config> <name-config name="mysqlConfig"> <property name="jdbcUrl">jdbc:mysql://localhost:3306/test</property> <property name="driverClass">com.mysql.jdbc.Driver</property> <property name="user">root</property> <property name="password">admin</property> <property name="acquireIncrement">3</property> <property name="initialPoolSize">10</property> <property name="minPoolSize">2</property> <property name="maxPoolSize">10</property> </name-config> </c3p0-config>
c3p0數據庫連接池使用