Spring框架入门HelloWorld :http://www.importnew.com/13246.html  (iteye 唐 博客，跟我学Sprint）

Spring 框架下载地址：http://repo.spring.io/release/org/springframework/spring/

Class.forName方法，此方法含义是：加载参数指定的类，并且初始化它。

// TODO Auto-generated method stub        //声明connection 对象        Connection con;        //驱动程序名        String driver = "com.mysql.jdbc.Driver";        //URL指向要访问的数据库名        String url  = "jdbc:mysql://localhost:3306/sqltestdb";        String user = "root";        String password = "123456";        try {            //加载驱动程序            Class.forName((driver));            //1 .getConnection()方法连接MYSQL数据库；            con = DriverManager.getConnection(url,user,password);

 

抽象类：抽象类不能实例化对象，类的其它功能仍然存在。抽象类只能被继承，才能被使用。在java中使用abstract 业定义抽象类；

/* 文件名 : Employee.java */public abstract class Employee{   private String name;   private String address;   private int number;   public Employee(String name, String address, int number)   {      System.out.println("Constructing an Employee");      this.name = name;      this.address = address;      this.number = number;   }   public double computePay()   {     System.out.println("Inside Employee computePay");     return 0.0;   }   public void mailCheck()   {      System.out.println("Mailing a check to " + this.name       + " " + this.address);   }}