转眼间，开学六周过去了，我也学习java这么长时间了。在此国庆期间闲来无事，做个小系统玩玩。

-------------student类封装-----------package StudentSystem;public class student extends user{	private int stuId;private String stuName;private String stuBirthday;public int getStuId() {	return stuId;}public void setStuId(int stuId) {	this.stuId = stuId;}public String getStuName() {	return stuName;}public void setStuName(String stuName) {	this.stuName = stuName;}public String getStuBirthday() {	return stuBirthday;}public void setStuBirthday(String stuBirthday) {	this.stuBirthday = stuBirthday;}@Overridepublic String toString() {	return "student [stuId=" + stuId + ", stuName=" + stuName			+ ", stuBirthday=" + stuBirthday + "]";}public student(){	super();}public student(int stuId,String stuName,String stuBirthday){	this.stuId=stuId;	this.stuName=stuName;	this.stuBirthday=stuBirthday;}}-------------------istudentDao接口--------------------------package StudentSystem;public interface istudentDao {/* * 新增加学生 *  */	public abstract boolean insert(student students);	/*	 * 删除学生	 * 	 */	public abstract boolean delete(int stuId);	/*	 * 更新学生	 * 	 */	public abstract boolean update(student students);	/*	 * 查找学生	 * 	 */	public  abstract  student search(int stuId);	public abstract void show();}------------------istudentDao接口实现------------------------------package StudentSystem;public  class studentDaoDemo implements studentDao {		private   student student1[] = new student[100];		public void start(){ 		for(int i=0;i<10;i++){			student student = new student(1000+i,"student"+i,"1995-10-"+i);				student1[i] = student;			}	}	@Override	public boolean insert(student students) {		/*遍历数组，找到第一个为空的位置*/		for(int i=0; i
     
      >");		System.out.println("请输要查找的学号：");		student students = stuDao.search(input.nextInt());		if( students!=null){			System.out.println("查找成功！"+students.toString());		}		else {			System.out.println("查找失败！");		}		returnMain();			}	/*	 * 插入一个学生	 * 	 */	public void Insert(){		System.out.println("请输入姓名：");		String name = input.next();		System.out.println("请输入stuId：");		int Id = input.nextInt();		System.out.println("请输入stuBir：");		String bir = input.next();		student students = new student(Id,name,bir);		        if(stuDao.insert(students))        	System.out.println("插入成功！");        else         	System.out.println("插入失败！");        	}	/*	 *删除一个学生信息 	 * 	 */	public void Delete(){				System.out.println("====按学号delete=====>>");		System.out.println("请输要delete的学号：");		if(stuDao.delete(input.nextInt()))		    System.out.println("删除成功！");		else			System.out.println("删除失败！");		returnMain();	}	/**	 * 更新一个学生的信息	 * 	 */	public void Update(){		System.out.println("请直接输入新信息更新！");		System.out.println("请输入new姓名：");		String name = input.next();		System.out.println("请输入stuId：");		int Id = input.nextInt();		System.out.println("请输入new stuBir：");		String bir = input.next();		student students = new student(Id,name,bir);		       if( stuDao.update(students))    	   System.out.println("更新成功！");       else    	   System.out.println("更新失败！");	}	public void show(){		stuDao.show();		}	/*	 * 按0返回主菜单	 * 	 */	public void returnMain(){		System.out.println("=================>>");		System.out.println("输入0返回主菜单");		int i = input.nextInt();		while(i!=0){			System.out.println("输入0返回主菜单");		     i = input.nextInt();		     if(i==0)		    	 mainMune();			}		mainMune();		}			}-------------------系统测试函数----------------------package StudentSystem;public class SystemTest {static student students = new student();public static void main(String[] args) {	 	studentMune mune = new studentMune();	mune.mainMune();	}}系统还会继续完善的，现在只实现了增、删、改、查基本操作！