[大数据]JDBC连接（Oracle，MySQL）

`### Oracle

package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class Test {
	//获取连接地址
	private static final String URL = "jdbc:oracle:thin:@//127.0.0.1:1521/orcl";
	//取得驱动程序名称
	private static final String DRIVER = "oracle.jdbc.driver.OracleDriver";
	//用户名
	private static final String USER = "SCOTT";
	//密码
	private static final String PASSWORD ="TIGER";
	//使用静态代码块加载连接驱动
	static{
		//利用反射加载类
		try {
			Class.forName(DRIVER);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	public static void main(String[] args) throws SQLException {
		//取得连接对象
		Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);
		//打印连接
		System.out.println(conn);
	}

}

MySQL

package mysqljdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class MysqlTest {
	private static String URL="jdbc:mysql://localhost:3307/scott"+"?useSSL=false&useUnicode=true"+"&characterEncoding=UTF-8&serverTimezone=UTC";
//	private static String URL = "jdbc:mysql://localhost:3307/scott" +"?useUnicode=true&useJDBCCompliantTimezoneShift=true"+"&useLegacyDatetimeCode=false&serverTimezone=UTC";
	private static String DRIVER="com.mysql.cj.jdbc.Driver";
	private static String USER = "root";
	private static String PASSWORD = "";//填写访问密码
	//加载驱动
	static{
		try {
			Class.forName(DRIVER);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	public static void main(String[] args) throws Exception {
		Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);
		System.out.println(conn);
	}

}