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);
}
}