学步园

package dbcp;

import java.sql.Connection;
import java.sql.SQLException;

import org.apache.commons.dbcp2.BasicDataSource;
import org.junit.Test;

/**
 * dbcp
 * @author zzh
 *
 */
public class Demo {
	@Test
	public void fun() throws SQLException{
		BasicDataSource dataSource  =new BasicDataSource();
		
		dataSource.setDriverClassName("com.mysql.jdbc.Driver");
		dataSource.setUrl("jdbc:mysql://localhost:3306/mydb1");
		dataSource.setUsername("root");
		dataSource.setPassword("123");
		
		dataSource.setMaxWaitMillis(1000);
		dataSource.setMinIdle(3);
		dataSource.setMaxTotal(20);
		
		Connection con = dataSource.getConnection();
		System.out.println(con.getClass().getName());
		
		con.close(); //把连接归还给池
	}
}

<pre name="code" class="html"><?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">123</property>
		
		<property name="acquireIncrement">3</property>
		<property name="initialPoolSize">10</property>
		<property name="minPoolSize">2</property>
		<property name="maxPoolSize">10</property>
	</default-config>
</c3p0-config>

package c3p0;

import java.beans.PropertyVetoException;
import java.sql.Connection;
import java.sql.SQLException;

import org.junit.Test;

import com.mchange.v2.c3p0.ComboPooledDataSource;

/**
 * c3p0
 * @author zzh
 *
 */
public class C3p0Demo {
	@Test
	public void fun() throws PropertyVetoException, SQLException{
		ComboPooledDataSource dataSource = new ComboPooledDataSource();
		//四大参数
		dataSource.setDriverClass("com.mysql.jdbc.Driver");
		dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/mydb1");
		dataSource.setUser("root");
		dataSource.setPassword("123");
		//设置参数
		dataSource.setAcquireIncrement(5);
		dataSource.setInitialPoolSize(20);
		dataSource.setMaxPoolSize(30);
		dataSource.setMinPoolSize(2);
		
		Connection con = dataSource.getConnection();
		System.out.println(con);
		con.close();
	}
	
	/**
	 * 配置文件连接
	 * 位子：src下   名字：c3p0-cofig.xml
	 * @throws SQLException
	 */
	@Test
	public void fun2() throws SQLException{
		ComboPooledDataSource dataSource = new ComboPooledDataSource();
		
		Connection con = dataSource.getConnection();
		System.out.println(con);
		con.close();

	}
}