java的DataSource类连接数据库原理

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();
         }
     }
}