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;
}
@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！