JDBC NOTE

JDBC 基本流程：

1. 加载驱动

  a. SQLSERVER:Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

  b.ORACLE      :Class.forName("oracle.jdbc.driver.oracleDriver");

  c.MySQL        :Class.forName("com.mysql.jdbc.Driver");

2.得到连接

  a.SQLSERVER: DriverManager.getConnection("jdbc:sqlserver://localhost:1433; DatabaseName=UserManager",userName,password);

  b.ORACLE      :DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:DBTEST",userName,password);

  c.MySQl         :DriverManager.getConnection("jdbc:mysql://localhost:3306/UserManager",userName,password);

3.创建PreparedStatement

4.执行操作

5.根据结果做处理

例：

    String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
        String dbURL="jdbc:sqlserver://localhost:1433; DatabaseName=UserManager";
        String sqlUserName="sa";
        String userPwd="wfjts12332100";
        Connection dbConn=null;
        ResultSet rs=null;
        PreparedStatement ps=null;
        try
        {
            Class.forName(driverName);
            dbConn=DriverManager.getConnection(dbURL,sqlUserName,userPwd);
            System.out.println("Connection Successful!");
            ps=dbConn.prepareStatement("select * from users where id=? and passwd=? ");
            ps.setObject(1, userName);
            ps.setObject(2, password);
            rs=ps.executeQuery();
            if(rs.next())
            {
                System.out.println("用戶合法");
            }
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }