package utils;

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

public class DBUtil {
	private static final String url = "jdbc:mysql://localhost:3306/test";
	private static final String driver = "com.mysql.jdbc.Driver";
	private static final String un = "root";
	private static final String psd = "728972";

	public static Connection connect() {
		Connection con = null;
		try {
			Class.forName(driver);
			con = DriverManager.getConnection(url, un, psd);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return con;
	}

	public static void free(Connection con, PreparedStatement pst, ResultSet rs) {
		try {
			if (rs != null) {
				rs.close();
			}
			if (pst != null) {
				pst.close();
			}
			if (con != null) {
				con.close();
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	// 测试
	public static void main(String[] args) {
		Connection con = connect();
		System.out.println(con);
	}
}