javaweb数据库的连接

//基于mysql的连接

Connection conn;

    Statement smt;
    ResultSet rs;

    String url="jdbc:mysql://localhost:3306/pro?useUnicode=true&characterEncoding=UTF-8";

    String user="root";

    String password="root";

    String sql="select * from users where username='"+uname+"' and password='"+pwd+"'";

    DriverManager.registerDriver(new Driver());  //加载驱动

    conn=DriverManager.getConnection(url, user, password);  //连接
    smt=conn.createStatement();

//查询

    rs=smt.executeQuery(sql);

//更新，增加，删除

rs=smt.executeUpdate(sql);