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Java使用JDBC连接任意类型数据库(mysqloracle。。)_MySQL

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2016-05-31 08:46:42804browse

package cn.liz.test;import java.io.InputStream;import java.sql.Connection;import java.sql.Driver;import java.sql.SQLException;import java.util.Properties;import org.junit.Test;public class JBDCtest {		/**	 * 编写一个通用的方法, 在不修改源程序的情况下, 可以获取任何数据库的连接	 * 解决方案: 把数据库驱动 Driver 实现类的全类名、url、user、password 放入一个	 * 配置文件中, 通过修改配置文件的方式实现和具体的数据库解耦. 	 * @throws Exception 	 */		public  Connection getConnection() throws Exception{		String driverClass = null;		String jdbcUrl = null;		String user = null;		String password = null;				//读取类路径下的 jdbc.properties 文件		InputStream in = 				getClass().getClassLoader().getResourceAsStream("jdbc.properties");		Properties properties = new Properties();		properties.load(in);		driverClass = properties.getProperty("driver");		jdbcUrl = properties.getProperty("jdbcUrl");		user = properties.getProperty("user");		password = properties.getProperty("password");				//通过反射常见 Driver 对象. 		Driver driver = 				(Driver) Class.forName(driverClass).newInstance();				Properties info = new Properties();		info.put("user", user);		info.put("password", password);				//通过 Driver 的 connect 方法获取数据库连接. 		Connection connection = driver.connect(jdbcUrl, info);				return connection;	}	@Test	public void testGetConnection() throws Exception{		System.out.println(getConnection());	}}<span style="white-space:pre">		</span>
<span style="font-family: Arial, Helvetica, sans-serif;">jdbc.properties</span>配置文件:
#driver=oracle.jdbc.driver.OracleDriver#jdbcUrl=jdbc:oracle:thin:@localhost:1521:orcl#user=scott#password=javadriver=com.mysql.jdbc.DriverjdbcUrl=jdbc:mysql://localhost:3306/testuser=rootpassword=

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