java的DataSource类连接数据库原理

需要jar包：

commons-validator.jar
commons-dbcp-1.3.jar
commons-beanutils.jar
commons-pool-1.5.2.jar
commons-logging.jar
ojdbc14.jar

 

 

 

package org.liujian.test.db;

import org.apache.commons.dbcp.BasicDataSource;

/**
 * File Desc: dataSource类
 * Product Name: SIRM
 * Module Name: BaseDase
 * Author:      刘建
 * History:     11-12-10 created by 刘建
 */
public class DataSource {
    private BasicDataSource dataSource;

    public static BasicDataSource getDataSource() {
        BasicDataSource basicDataSource = new BasicDataSource();
        basicDataSource.setDefaultAutoCommit(true);
        basicDataSource.setDriverClassName("oracle.jdbc.driver.OracleDriver");
        basicDataSource.setUrl("jdbc:oracle:thin:@192.168.20.160:1521:orcl");
        basicDataSource.setUsername("sirmetltest");
        basicDataSource.setPassword("sirmetltest");
        return basicDataSource;
    }
}

 

package org.liujian.test.db;


import java.sql.*;

/**
 * File Desc:
 * Product Name: SIRM
 * Module Name: BaseDase
 * Author:      刘建
 * History:     11-12-10 created by 刘建
 */
public class DataSourceFactory {
    public static void main(String[] args) {
        try {
            // Class.forName("oracle.jdbc.driver.OracleDriver");
            // Connection ct = DriverManager.getConnection("jdbc:oracle:thin:@192.168.20.160:1521:orcl", "sirmetltest", "sirmetltest");
            Connection ct = DataSource.getDataSource().getConnection();
            Statement statement = ct.createStatement();
            ResultSet rs = statement.executeQuery("select * from r_database");
            while (rs.next()) {
                System.out.println(rs.getString("name"));
            }
            rs.close();
            statement.close();
            ct.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}