我用的是MySQL数据库，把驱动和连接字符串、库、表换成你自己的。

try 
        {
            Class.forName("com.mysql.jdbc.Driver");
            Connection conn = DriverManager.getConnection("JDBC:MYSQL://LocalHost:3306/demo","root","123456");
            Statement stm = conn.createStatement();
            ResultSet rs = stm.executeQuery("select * from demo");
            Vector<String[]> vector = new Vector<String[]>();
            while(rs.next())
            {
                String[]str = new String[3];
                for(int i=0;i<str.length;i++)
                    str[i] = rs.getString(i+1);
                
                vector.add(str);
            }
            
        } 
        catch (Exception e) 
        {
            
        }