JDBC——连接数据库的代码

第一步：在SCR下创建一个file,写好数据库的相关信息。

#oracle数据库
driver=oracle.jdbc.driver.OracleDriver
jdbcUrl=jdbc:oracle:thin:@localhost:1521:orcl
user=scott
password=yue170305

# mysql数据库
driver=com.mysql.jdbc.Driver
jdbcUrl=jdbc:mysql://localhost:3306/test
user=root
password=yue170305

第二步：连接数据库

public static Connection getConnection() throws Exception {
		String driverClass = null;
		String jdbcUrl = null;
		String user = null;
		String password = null;
		// 读取文件

		InputStream in = JDBCTools.class.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");

		Driver driver = (Driver) Class.forName(driverClass).newInstance();
		Properties info = new Properties();

		info.put("user", user);
		info.put("password", password);
		Connection connection = driver.connect(jdbcUrl, info);
		return connection;

	}