JavaWeb學習(四)

項目結構

public class DBHelper {

    public static final String url = "jdbc:mysql://localhost:3306/test";
    public static final String name = "com.mysql.jdbc.Driver";
    public static final String user = "root";
    public static final String password = "";
    public Connection conn = null;
    public PreparedStatement pst = null;

    public DBHelper(String sql) {
        try {
            Class.forName(name);//
            conn = DriverManager.getConnection(url, user, password);//
            pst = conn.prepareStatement(sql);//
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void close() {
        try {
            this.conn.close();
            this.pst.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }


}