dreamzqy29

   首先我们先建立一个接口StudnetDao
  public interfaces StudentDao{
            public void insert(Student student);
}

再用一个类来实现该接口

public class StudentDaoimp implements StudentDao{
         public void insert(Student student){
      }
}

用一个工厂来产生对象

public class DaoFactory{
      public static StudentDao getStudentDao(){
            return new StudentDaoimp();         
      }
}

public class Student{
      private int studentID;

   public int getStudentID() {
     return studentID;
 }
 public void setStudentID(int age) {
     this.studentID= studentID;
 }


}