java 学习日记---------简易学生信息管理系统

-------------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;
}

@Override
public 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<student1.length;i++){
			if(student1[i] == null){
				System.out.println("插入第"+(i+1)+"个");
				student1[i]=students;
				break;
			}
		}
		return true;
	}

	@Override
	public boolean delete(int stuId) {
     if(search(stuId) == null)
		return false;
     for(int i=0;i<student1.length;i++){
    	 if(student1[i].getStuId()==stuId){
    		  int j=i;
    	 while(student1[j+1]!=null){
    		 student1[j]=student1[j+1];
    		 j++;
    	 }
    	 student1[j]=null; // 把最后一个不为空的元素置空
    	 break;
     } 
     }
     return true;
	}

	@Override
	public boolean update(student students) {
     /*按学号查找，更新数据*/
		System.out.println("test uodate stuId"+students.getStuId());
		if(search(students.getStuId()) == null)
		return false;
		else{
			for(int i=0;i<student1.length;i++){
				if(student1[i].getStuId() == students.getStuId()){
					student1[i] = students;	
				    break;
				}
			}
			return true;
		}
	}

	@SuppressWarnings("unused")
	public student search (int stuId) {
      student student = null;
      for(int i=0;i<student1.length; i++){
    	  if(student1[i].getStuId() == stuId){
    		  student = student1[i];
    		  break;
    	  }
    		 return null; 
      }
		return student;
	}
	/*
	 * 输出所有学生信息
	 * 
	 */
	public void show(){
		int j=0;
		for(int i=0;i<student1.length;i++){
			if(student1[i]!=null)
				j++;
		}
		System.out.println("系统中共有"+j+"名学生信息！");
		for(int i=0;i<j;i++){
			String result = student1[i].toString();
			System.out.println(result);
		}
	}

}
------------------studentMune-------------------------------
package StudentSystem;

import java.util.Scanner;

public class studentMune {
	private studentDaoDemo stuDao;
	private Scanner input=null;
	
	public  studentMune(){
		  super();
          this.input = new Scanner(System.in);
          this.stuDao = new studentDaoDemo();
	}
	public void mainMune(){
		//stuDao.start();
		System.out.println("====学生系统欢迎你====");
		System.out.println("1、查看学生信息");
		System.out.println("2、增加一个学生信息");
		System.out.println("3、删除一个学生信息");
		System.out.println("4、更新一个学生信息");
		System.out.println("5、查找一个学生信息");
		System.out.println("6、退出学生系统");
		System.out.println("=====================");
	
		System.out.println("请输入对应编号进行操作：");
		String i = input.next();
		switch(i){
		case "1": show();break;
		case "2": Insert();break;
		case "3": Delete();break;
		case "4": Update(); break;
		case "5": Search();break;
		case "6": System.exit(0);break;
		default: System.out.println("你的输入有误，请重新输入！");
		}
        returnMain();
	}
	/*
	 * 查找学生信息
	 * 
	 */
	public void Search(){
		System.out.println("==按学号查找==>>");
		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！