一、工具类DBUtil——数据库连接

package util;

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

/*
 * 数据库连接工具
 */
public class DBUtil {
    static String ip = "127.0.0.1";
    static int port = 3306;
    static String database = "tmall";      //此处可灵活修改
    static String encoding = "UTF-8";
    static String loginName = "root";      //此处可灵活修改
    static String password = "admin";      //此处可灵活修改
    static {
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    } 
    
    public static Connection getConnection() throws SQLException {
        String url = String.format("jdbc:mysql://%s:%d/%s?characterEncoding=%s", ip, port, database, encoding);
        return DriverManager.getConnection(url, loginName, password);
    }
    //测试用例
    public static void main(String[] args) throws SQLException {
        System.out.println(getConnection());
        
    }
}