使用DBCP便利链接数据库以及使用链接池

package com.dbcp.cn;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSource;
import org.apache.commons.dbcp.BasicDataSourceFactory;
import org.junit.Test;

public class DBCP_Test {
    /**
     * 硬链接
     * 
     * @throws Exception
     */
    @Test
    public void dbcp_test_old() throws Exception {
        BasicDataSource dataSource = new BasicDataSource();
        dataSource.setUrl("jdbc:mysql://localhost:3306/staff");
        dataSource.setUsername("root");
        dataSource.setPassword("123456");
        dataSource.setInitialSize(3);// 设置链接池初始值
        dataSource.setMaxActive(6);// 设置最大连接数
        dataSource.setMaxIdle(3000);// 设置最大活跃时间
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        Connection connection = dataSource.getConnection();
        PreparedStatement prepareStatement = connection.prepareStatement("delete from user where id=16");
        prepareStatement.executeUpdate();
        prepareStatement.close();
        connection.close();
    }

    /**
     * 配置方式实现链接
     * @throws Exception
     */
    @Test
    public void dbcp_test() throws Exception {
        Properties properties = new Properties();//配置文件
        properties.load(DBCP_Test.class.getResourceAsStream("/db.properties"));
        DataSource dataSource = BasicDataSourceFactory.createDataSource(properties);
        Connection connection = dataSource.getConnection();
        PreparedStatement prepareStatement = connection.prepareStatement("delete from user where id=17");
        prepareStatement.executeUpdate();
        prepareStatement.close();
        connection.close();
    }
}

url=jdbc:mysql://localhost:3306/staff
username=root
password=123456
driverClassName=com.mysql.jdbc.Driver

需要导入三个jar包

commons-dbcp-1.4.jar

commons-pool-1.5.6.jar

mysql-connector-java-5.1.7-bin.jar