c3p0管理jdbc连接demo

package com.yjm.c3p0;

import java.beans.PropertyVetoException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.mchange.v2.c3p0.ComboPooledDataSource;

/**
 * 
 * @author yjm18
 * c3p0 创建与管理 jdbc数据库连接池
 *
 */

public class ConnectionFactoryc3p0 {
	public static ComboPooledDataSource comboPooledDataSource = null;
	static {
		// 初始化 c3p0 JDBC数据连接与控制池
		comboPooledDataSource = new ComboPooledDataSource();
		try {
			comboPooledDataSource.setDriverClass("com.mysql.jdbc.Driver");
		} catch (PropertyVetoException e) {
			e.printStackTrace();
		}
		comboPooledDataSource
				.setJdbcUrl("jdbc:mysql://localhost:3306/itruscnoocgasmock?useUnicode=true&characterEncoding=UTF-8");
		comboPooledDataSource.setUser("root");
		comboPooledDataSource.setPassword("1234");
		comboPooledDataSource.setMinPoolSize(20);
		comboPooledDataSource.setMaxPoolSize(50);
	}

	public static synchronized Connection getC3p0Connection() {
		Connection con=null;
		try {
			con= comboPooledDataSource.getConnection();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			return con;
		}
	}
	public static void main(String[] args) {
		try {
			//通过c3p0进行查询操作
			ResultSet rs = ConnectionFactoryc3p0.getC3p0Connection()
					.prepareStatement("select * from signinfo").executeQuery();
			while (rs.next()) {
				System.out.println(rs.getString(1));
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}

		System.out.println();

	}
}

不用框架管理 jdbc数据连接池。增加 增删改查处理效率。