在线商品销售

public class DBConnection { private Connection connection; private String db_Name = "qian"; private String db_User = "root"; private String db_Password = "lubing"; public DBConnection(){ this.getConection(); } /* * 得到Connection对象。 */ public Connection getConection(){ try { // 加载数据库驱动 Class.forName("com.mysql.jdbc.Driver"); // 指定连接数据库的URL String url = "jdbc:mysql://localhost:3306/" + db_Name; // 通过DriverManager的getConnection()建立连接 connection = DriverManager.getConnection(url, db_User, db_Password); if (connection == null) { System.out.println("数据连接出错了！"); } } catch (Exception e) { e.printStackTrace(); } return connection ; } /* * 关闭数据集/语句/连接对象 */ public void close(Resul

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