C3p0鏈接池配置

package DB;

import com.mchange.v2.c3p0.ComboPooledDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.SQLException;

/**
 * Created by Administrator on 2018\11\23 0023.
 */
public class C3p0Utils {


    private static DataSource dataSource=null;
    static{
        dataSource=new ComboPooledDataSource("mysql");
    }

    /*
     c3p0數據庫鏈接
     */

    public static Connection getConnection(){
       Connection connection = null;
       try{
           connection = dataSource.getConnection();
       }catch (Exception E){
           E.printStackTrace();
       }
        return connection;
    }

    /**
     * 關閉數據庫鏈接
     *
     */
    public static void closeConn(Connection connection){
        try {
            //若是鏈接不等於空  而且鏈接已經關閉 選擇關閉鏈接connection

            if(connection!=null && connection.isClosed()){
                connection.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }



}

 

 

配置 

<?xml version="1.0" encoding="UTF-8"?>
<!-- 配置c3p0config -->
<c3p0-config>
    <default-config>
        <property name="initialPoolSize">10</property>
        <property name="maxIdleTime">30</property>
        <property name="maxPoolSize">100</property>
        <property name="minPoolSize">10</property>
        <property name="maxStatements">200</property>
    </default-config>

    <named-config name="mysql">
        <property name="driverClass">com.mysql.jdbc.Driver</property>
        <property name="jdbcUrl">jdbc:mysql://localhost:3306/test</property>
        <property name="user">root</property>
        <property name="password">123456</property>
        <property name="initialPoolSize">10</property>
        <property name="maxIdleTime">30</property>
        <property name="maxPoolSize">100</property>
        <property name="minPoolSize">10</property>
        <property name="maxStatements">200</property>
    </named-config>

</c3p0-config>