这个问题如果用jsp和数据库的内容做那会非常简单，那么只用java面向对象来做呢？问题分析：本题首先需要建1.学生类2.班级类3.科目类4.对管理员和老师的接口（因为只有方法没有属性，用接口会简单一些）5.测试类
1.学生类，建立学生的名字，学号，id即可。然后构造学生方法，让每个班继承
public class Students {
public String name;
public String stunum;
public String id;
public Subject[] subject;
//构造学生的方法
public Students(String name,String stuNum,
String id){
this.name=name;
this.stunum=stuNum;
this.id=id;
}
}
2.班级类，继承学生类的属性并且设置班级属性为静态属性，不可改变
一班
public class FirstClassStudentextends Students{
//班级设置为静态属性，不可改变
public static final String CLASS_NUMBER="java01";
public FirstClassStudent(Stringname,
String stuNum,
String id) {
super(name,stuNum, id);
}
}
二班
public class SecondClassStudentextends Students{
public static final String CLASS_NUMBER ="java02";
public SecondClassStudent(Stringname,
String stuNum,
String id) {
super(name,stuNum, id);
}
}
3.科目类
构建科目类方法，在测试类调用
public class Subject {
public String subNum;
public String subname;
public int score;
public Subject(String subNum,String subname,int score){
this.subNum=subNum;
this.subname=subname;
this.score=score;
}
}
4.对管理员和老师的接口
(1)接口类 判断是不是学生操作【注：作者此处类名写的有问题，一般类名超过15字符当全部缩写，by等介词除外】
public interface IStudentOperator {
public void searchScoreByStudentName(Scannerscanner,FirstClassStudent[] yiban);
public void sSBySNO(Scannerscanner,FirstClassStudent[] yiBanSNO);
public void sSByAlter(Scannerscanner,FirstClassStudent[] yiBanAlter);
public void sSByAlterName(Scannerscanner,FirstClassStudent[] yiBanAlterName);
}
(2)管理员类
实现接口
public class Administratorimplements IStudentOperator{
@Override
public void searchScoreByStudentName(Scannerscanner,FirstClassStudent[] yiBan)
{
System.out.println("管理员的查询过程");
System.out.print("请输入需要查询学生的姓名：");
String name = scanner.next();
for(inti=0;i<<span
class="s3">yiBan.length;i++){
if(yiBan[i].name.equals(name)){
Subject[] sub = yiBan[i].subject;
System.out.println(name+"的成绩有:");
if(null ==sub){
System.out.println("无选课成绩");
continue;
}
for(intj=0;j<<span
class="s3">sub.length;j++){
System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}
}
}
}
@Override
public void sSBySNO(Scannerscanner,
FirstClassStudent[] yiBanSNO) {
System.out.println("管理员的查询过程");
System.out.print("请输入需要查询学生的学号：");
String stunum = scanner.next();
for(inti=0;i<<span
class="s3">yiBanSNO.length;i++){
if(yiBanSNO[i].stunum.equals(stunum)){
Subject[] sub = yiBanSNO[i].subject;
System.out.println(stunum+"的人是"+yiBanSNO[i].name);
System.out.println(yiBanSNO[i].name+"的成绩有:
for(intj=0;j<<span
class="s3">sub.length;j++){
System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}
}else{
System.out.println("查无此人");
}
}
}
@Override
public void sSByAlter(Scannerscanner,
FirstClassStudent[] yiBanAlter) {
System.out.println("管理员通过id修改的过程");
System.out.print("请输入该学生的id：");
String id = scanner.next();
for(inti=0;i<<span
class="s3">yiBanAlter.length;i++){
if(yiBanAlter[i].id.equals(id)){
Subject[] sub = yiBanAlter[i].subject;
System.out.println(id+"的人是"+yiBanAlter[i].name);
System.out.println("请输入修改后的名字");
StringalterName=scanner.next();
yiBanAlter[i].name=alterName;
System.out.println("名字修改为"+yiBanAlter[i].name);
System.out.println(yiBanAlter[i].name+"的成绩为");
for(intj=0;j<<span
class="s3">sub.length;j++){
System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}
}
}
}
@Override
public void sSByAlterName(Scannerscanner,
FirstClassStudent[] yiBanAlterName) {
System.out.println("管理员通过名字修改的成绩");
System.out.print("请输入该学生的名字：");
String name = scanner.next();
for(inti=0;i<</span>yiBanAlterName.length;i++){
if(yiBanAlterName[i].name.equals(name)){
Subject[] sub = yiBanAlterName[i].subject;
System.out.println(yiBanAlterName[i].name+"的成绩修改为");
intalterScore=scanner.nextInt();
System.out.println(yiBanAlterName[i].name+"的成绩为");
for(intj=0;j<<span
class="s3">sub.length;j++){
switch (sub[i].subname) {
case"数学":
break;
default:
break;
}
sub[j].score=alterScore;
System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}
}
}
}
}
(3)老师类
同上
public class Teacher implements IStudentOperator{
@Override
public void searchScoreByStudentName(Scannerscanner,FirstClassStudent[] yiBan)
{
System.out.println("老师的查询过程");
System.out.print("请输入需要查询学生的姓名：");
String name = scanner.next();
for(inti=0;i<<span
class="s4">yiBan.length;i++){
if(yiBan[i].name.equals(name)){
Subject[] sub = yiBan[i].subject;
System.out.println(name+"的成绩有:");
if(null ==sub){
System.out.println("无选课成绩");
continue;
}
for(intj=0;j<<span
class="s4">sub.length;j++){
System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}
}
}
}
@Override
public void sSBySNO(Scannerscanner,
FirstClassStudent[] yiBanSNO) {
System.out.println("老师的查询过程");
System.out.print("请输入需要查询学生的学号：");
String stunum = scanner.next();
for(inti=0;i<<span
class="s4">yiBanSNO.length;i++){
if(yiBanSNO[i].stunum.equals(stunum)){
Subject[] sub = yiBanSNO[i].subject;
System.out.println(stunum+"的人是"+yiBanSNO[i].name);
System.out.println(yiBanSNO[i].name+"的成绩有:");
if(null ==sub){
System.out.println("无选课成绩");
continue;
}
for(intj=0;j<<span
class="s4">sub.length;j++){
System.out.print(sub[j].subname+"\t"+sub[j].score);
System.out.println();
}
}
}
}
}
5.测试类
public class Test {
public staticvoid main(String[] args)
{
FirstClassStudent liuxiong =new FirstClassStudent("刘雄", "50", "50000");
FirstClassStudent wangyu =new FirstClassStudent("王宇", "48", "48000");
FirstClassStudent gouwenbo =new FirstClassStudent("苟文博", "16", "16000");
FirstClassStudent liuxiong1 =new FirstClassStudent("刘雄", "99", "99000");
//创建一班的数组
FirstClassStudent[] yiBan = {liuxiong,wangyu,gouwenbo,liuxiong1};
Subject liuxiongmath =new Subject("01", "数学",
59);
Subject liuxiongEnglish =new Subject("02", "英语",
1);
Subject liuxiongyuwen =new Subject("03", "语文",
59);
Subject liuxiongjisuanji =new Subject("04", "计算机",
59);
Subject[] subs = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
liuxiong.subject =subs;
Subject wangyumath =new Subject("01", "数学",
59);
Subject wangyuEnglish =new Subject("02", "英语",
1);
Subject wangyuyuwen =new Subject("03", "语文",
59);
Subject wangyujisuanji =new Subject("04", "计算机",
59);
Subject[] sub1 = {wangyuEnglish,wangyujisuanji,wangyumath,wangyuyuwen};
wangyu.subject =sub1;
Subject gouwenbomath =new Subject("01", "数学",
59);
Subject gouwenboEnglish =new Subject("02", "英语",
1);
Subject gouwenboyuwen =new Subject("03", "语文",
59);
Subject gouwenbojisuanji =new Subject("04", "计算机",
59);
Subject[] sub2 = {gouwenboEnglish,gouwenbojisuanji,gouwenbomath,gouwenboyuwen};
gouwenbo.subject =sub2;
Subject liuxiong1math =new Subject("01", "数学",
59);
Subject liuxiong1English =new Subject("02", "英语",
1);
Subject liuxiong1yuwen =new Subject("03", "语文",
59);
Subject liuxiong1jisuanji =new Subject("04", "计算机",
59);
Subject[] sub3 = {liuxiong1English,liuxiong1jisuanji,liuxiong1math,liuxiong1yuwen};
liuxiong1.subject =sub3;
FirstClassStudent fifty =new FirstClassStudent("刘雄", "50", "50000");
FirstClassStudent foutyEight =new FirstClassStudent("王宇", "48", "48000");
FirstClassStudent sixteen =new FirstClassStudent("苟文博", "16", "16000");
FirstClassStudent nintynine =new FirstClassStudent("刘雄", "99", "99000");
FirstClassStudent[] yiBanSNO =
{fifty,foutyEight,sixteen,nintynine};
Subject fiftymath =new Subject("01", "数学",
59);
Subject fiftyEnglish =new Subject("02", "英语",
1);
Subject fiftyyuwen =new Subject("03", "语文",
59);
Subject fiftyjisuanji =new Subject("04", "计算机",
59);
Subject[] SNO1 = {fiftyEnglish,fiftyjisuanji,fiftymath,fiftyyuwen};
fifty.subject =SNO1;
Subject foutyEightmath =new Subject("01", "数学",
59);
Subject foutyEightEnglish =new Subject("02", "英语",
1);
Subject foutyEightyuwen =new Subject("03", "语文",
59);
Subject foutyEightjisuanji =new Subject("04", "计算机",
59);
Subject[] SNO2 = {foutyEightEnglish,foutyEightjisuanji,foutyEightmath,foutyEightyuwen};
foutyEight.subject =SNO2;
Subject sixteenmath =new Subject("01", "数学",
59);
Subject sixteenEnglish =new Subject("02", "英语",
1);
Subject sixteenyuwen =new Subject("03", "语文",
59);
Subject sixteenjisuanji =new Subject("04", "计算机",
59);
Subject[] SNO3 = {sixteenEnglish,sixteenjisuanji,sixteenmath,sixteenyuwen};
sixteen.subject =SNO3;
Subject nintyninemath =new Subject("01", "数学",
59);
Subject nintynineEnglish =new Subject("02", "英语",
1);
Subject nintynineyuwen =new Subject("03", "语文",
59);
Subject nintyninejisuanji =new Subject("04", "计算机",
59);
Subject[] SNO4 = {nintynineEnglish,nintyninejisuanji,nintyninemath,nintynineyuwen};
nintynine.subject =SNO4;
FirstClassStudent alter50 =new FirstClassStudent("刘雄", "50", "50000");
FirstClassStudent alter48 =new FirstClassStudent("王宇", "48", "48000");
FirstClassStudent alter16 =new FirstClassStudent("苟文博", "16", "16000");
FirstClassStudent alter99 =new FirstClassStudent("刘雄", "99", "99000");
FirstClassStudent[] yiBanAlter =
{alter16,alter48,alter50,alter99};
Subject alter16math =new Subject("01", "数学",
59);
Subject alter16English =new Subject("02", "英语",
1);
Subject alter16yuwen =new Subject("03", "语文",
59);
Subject alter16jisuanji =new Subject("04", "计算机",
59);
Subject[] suba1 =
{liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter16.subject =suba1;
Subject alter50math =new Subject("01", "数学",
59);
Subject alter50English =new Subject("02", "英语",
1);
Subject alter50yuwen =new Subject("03", "语文",
59);
Subject alter50jisuanji =new Subject("04", "计算机",
59);
Subject[] suba2 =
{liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter50.subject =suba2;
Subject alter48math =new Subject("01", "数学",
59);
Subject alter48English =new Subject("02", "英语",
1);
Subject alter48yuwen =new Subject("03", "语文",
59);
Subject alter48jisuanji =new Subject("04", "计算机",
59);
Subject[] suba3 =
{liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter48.subject =suba3;
Subject alter99math =new Subject("01", "数学",
59);
Subject alter99English =new Subject("02", "英语",
1);
Subject alter99yuwen =new Subject("03", "语文",
59);
Subject alter99jisuanji =new Subject("04", "计算机",
59);
Subject[] suba4 =
{liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter99.subject =suba4;
FirstClassStudent alterliuxiong =new FirstClassStudent("刘雄", "50", "50000");
FirstClassStudent alterwangyu =new FirstClassStudent("王宇", "48", "48000");
FirstClassStudent altergouwenbo =new FirstClassStudent("苟文博", "16", "16000");
FirstClassStudent alterliuxiong1 =new FirstClassStudent("刘雄", "99", "99000");
FirstClassStudent[] yiBanAlterName =
{altergouwenbo,alterliuxiong,alterliuxiong1,alterwangyu};
Subject alterliuxiongmath =new Subject("01", "数学",
59);
Subject alterliuxiongEnglish =new Subject("02", "英语",
1);
Subject alterliuxiongyuwen =new Subject("03", "语文",
59);
Subject alterliuxiongjisuanji =new Subject("04", "计算机",
59);
Subject[] subn1 =
{liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alterliuxiong.subject =subn1;
Subject altergouwenbomath =new Subject("01", "数学",
59);
Subject altergouwenboEnglish =new Subject("02", "英语",
1);
Subject altergouwenboyuwen =new Subject("03", "语文",
59);
Subject altergouwenbojisuanji =new Subject("04", "计算机",
59);
Subject[] subn2 =
{gouwenboEnglish,gouwenbojisuanji,gouwenbomath,gouwenboyuwen};
altergouwenbo.subject =subn2;
Subject alterwangyumath =new Subject("01", "数学",
59);
Subject alterwangyuEnglish =new Subject("02", "英语",
1);
Subject alterwangyuyuwen =new Subject("03", "语文",
59);
Subject alterwangyujisuanji =new Subject("04", "计算机",
59);
Subject[] subn3 =
{wangyuEnglish,wangyujisuanji,wangyumath,wangyuyuwen};
alterwangyu.subject =subn3;
Subject alterliuxiong1math =new Subject("01", "数学",
59);
Subject alterliuxiong1English =new Subject("02", "英语",
1);
Subject alterliuxiong1yuwen =new Subject("03", "语文",
59);
Subject alterliuxiong1jisuanji =new Subject("04", "计算机",
59);
Subject[] subn4 =
{liuxiong1English,liuxiong1jisuanji,liuxiong1math,liuxiong1yuwen};
alterliuxiong1.subject =subn4;
Scanner scanner =new Scanner(System.in);
IStudentOperator admin =new Administrator();
IStudentOperator teacher =new Teacher();
System.out.println("请输入角色");
System.out.println("0管理员\t1老师");
int role = scanner.nextInt();
if(role==0){
admin =new Administrator();
}else if(role==1){
teacher =new Teacher();
}else{
System.out.println("无该角色");
return;
}
System.out.print("请输入要执行的操作");
System.out.println("0：通过名字查询成绩\t1：通过学号查询成绩\t2:通过id修改姓名\t3：通过姓名修改成绩\t4：通过姓名删除成绩");
int type = scanner.nextInt();
switch (type) {
case 0:
admin.searchScoreByStudentName(scanner,yiBan);
break;
case 1:
admin.sSBySNO(scanner,yiBanSNO);
break;
case 2:
admin.sSByAlter(scanner,yiBanAlter);
break;
case 3:
break;
default:
System.out.println("抱歉！该功能正在制作中");
break;
}
}
}
public class Test {
public staticvoid main(String[] args)
{
FirstClassStudent liuxiong =new FirstClassStudent("刘雄", "50", "50000");
FirstClassStudent wangyu =new FirstClassStudent("王宇", "48", "48000");
FirstClassStudent gouwenbo =new FirstClassStudent("苟文博", "16", "16000");
FirstClassStudent liuxiong1 =new FirstClassStudent("刘雄", "99", "99000");
//创建一班的数组
FirstClassStudent[] yiBan = {liuxiong,wangyu,gouwenbo,liuxiong1};
Subject liuxiongmath =new Subject("01", "数学",
59);
Subject liuxiongEnglish =new Subject("02", "英语",
1);
Subject liuxiongyuwen =new Subject("03", "语文",
59);
Subject liuxiongjisuanji =new Subject("04", "计算机",
59);
Subject[] subs = {liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
liuxiong.subject =subs;
Subject wangyumath =new Subject("01", "数学",
59);
Subject wangyuEnglish =new Subject("02", "英语",
1);
Subject wangyuyuwen =new Subject("03", "语文",
59);
Subject wangyujisuanji =new Subject("04", "计算机",
59);
Subject[] sub1 = {wangyuEnglish,wangyujisuanji,wangyumath,wangyuyuwen};
wangyu.subject =sub1;
Subject gouwenbomath =new Subject("01", "数学",
59);
Subject gouwenboEnglish =new Subject("02", "英语",
1);
Subject gouwenboyuwen =new Subject("03", "语文",
59);
Subject gouwenbojisuanji =new Subject("04", "计算机",
59);
Subject[] sub2 = {gouwenboEnglish,gouwenbojisuanji,gouwenbomath,gouwenboyuwen};
gouwenbo.subject =sub2;
Subject liuxiong1math =new Subject("01", "数学",
59);
Subject liuxiong1English =new Subject("02", "英语",
1);
Subject liuxiong1yuwen =new Subject("03", "语文",
59);
Subject liuxiong1jisuanji =new Subject("04", "计算机",
59);
Subject[] sub3 = {liuxiong1English,liuxiong1jisuanji,liuxiong1math,liuxiong1yuwen};
liuxiong1.subject =sub3;
FirstClassStudent fifty =new FirstClassStudent("刘雄", "50", "50000");
FirstClassStudent foutyEight =new FirstClassStudent("王宇", "48", "48000");
FirstClassStudent sixteen =new FirstClassStudent("苟文博", "16", "16000");
FirstClassStudent nintynine =new FirstClassStudent("刘雄", "99", "99000");
FirstClassStudent[] yiBanSNO =
{fifty,foutyEight,sixteen,nintynine};
Subject fiftymath =new Subject("01", "数学",
59);
Subject fiftyEnglish =new Subject("02", "英语",
1);
Subject fiftyyuwen =new Subject("03", "语文",
59);
Subject fiftyjisuanji =new Subject("04", "计算机",
59);
Subject[] SNO1 = {fiftyEnglish,fiftyjisuanji,fiftymath,fiftyyuwen};
fifty.subject =SNO1;
Subject foutyEightmath =new Subject("01", "数学",
59);
Subject foutyEightEnglish =new Subject("02", "英语",
1);
Subject foutyEightyuwen =new Subject("03", "语文",
59);
Subject foutyEightjisuanji =new Subject("04", "计算机",
59);
Subject[] SNO2 = {foutyEightEnglish,foutyEightjisuanji,foutyEightmath,foutyEightyuwen};
foutyEight.subject =SNO2;
Subject sixteenmath =new Subject("01", "数学",
59);
Subject sixteenEnglish =new Subject("02", "英语",
1);
Subject sixteenyuwen =new Subject("03", "语文",
59);
Subject sixteenjisuanji =new Subject("04", "计算机",
59);
Subject[] SNO3 = {sixteenEnglish,sixteenjisuanji,sixteenmath,sixteenyuwen};
sixteen.subject =SNO3;
Subject nintyninemath =new Subject("01", "数学",
59);
Subject nintynineEnglish =new Subject("02", "英语",
1);
Subject nintynineyuwen =new Subject("03", "语文",
59);
Subject nintyninejisuanji =new Subject("04", "计算机",
59);
Subject[] SNO4 = {nintynineEnglish,nintyninejisuanji,nintyninemath,nintynineyuwen};
nintynine.subject =SNO4;
FirstClassStudent alter50 =new FirstClassStudent("刘雄", "50", "50000");
FirstClassStudent alter48 =new FirstClassStudent("王宇", "48", "48000");
FirstClassStudent alter16 =new FirstClassStudent("苟文博", "16", "16000");
FirstClassStudent alter99 =new FirstClassStudent("刘雄", "99", "99000");
FirstClassStudent[] yiBanAlter =
{alter16,alter48,alter50,alter99};
Subject alter16math =new Subject("01", "数学",
59);
Subject alter16English =new Subject("02", "英语",
1);
Subject alter16yuwen =new Subject("03", "语文",
59);
Subject alter16jisuanji =new Subject("04", "计算机",
59);
Subject[] suba1 =
{liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter16.subject =suba1;
Subject alter50math =new Subject("01", "数学",
59);
Subject alter50English =new Subject("02", "英语",
1);
Subject alter50yuwen =new Subject("03", "语文",
59);
Subject alter50jisuanji =new Subject("04", "计算机",
59);
Subject[] suba2 =
{liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter50.subject =suba2;
Subject alter48math =new Subject("01", "数学",
59);
Subject alter48English =new Subject("02", "英语",
1);
Subject alter48yuwen =new Subject("03", "语文",
59);
Subject alter48jisuanji =new Subject("04", "计算机",
59);
Subject[] suba3 =
{liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter48.subject =suba3;
Subject alter99math =new Subject("01", "数学",
59);
Subject alter99English =new Subject("02", "英语",
1);
Subject alter99yuwen =new Subject("03", "语文",
59);
Subject alter99jisuanji =new Subject("04", "计算机",
59);
Subject[] suba4 =
{liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alter99.subject =suba4;
FirstClassStudent alterliuxiong =new FirstClassStudent("刘雄", "50", "50000");
FirstClassStudent alterwangyu =new FirstClassStudent("王宇", "48", "48000");
FirstClassStudent altergouwenbo =new FirstClassStudent("苟文博", "16", "16000");
FirstClassStudent alterliuxiong1 =new FirstClassStudent("刘雄", "99", "99000");
FirstClassStudent[] yiBanAlterName =
{altergouwenbo,alterliuxiong,alterliuxiong1,alterwangyu};
Subject alterliuxiongmath =new Subject("01", "数学",
59);
Subject alterliuxiongEnglish =new Subject("02", "英语",
1);
Subject alterliuxiongyuwen =new Subject("03", "语文",
59);
Subject alterliuxiongjisuanji =new Subject("04", "计算机",
59);
Subject[] subn1 =
{liuxiongEnglish,liuxiongjisuanji,liuxiongmath,liuxiongyuwen};
alterliuxiong.subject =subn1;
Subject altergouwenbomath =new Subject("01", "数学",
59);
Subject altergouwenboEnglish =new Subject("02", "英语",
1);
Subject altergouwenboyuwen =new Subject("03", "语文",
59);
Subject altergouwenbojisuanji =new Subject("04", "计算机",
59);
Subject[] subn2 =
{gouwenboEnglish,gouwenbojisuanji,gouwenbomath,gouwenboyuwen};
altergouwenbo.subject =subn2;
Subject alterwangyumath =new Subject("01", "数学",
59);
Subject alterwangyuEnglish =new Subject("02", "英语",
1);
Subject alterwangyuyuwen =new Subject("03", "语文",
59);
Subject alterwangyujisuanji =new Subject("04", "计算机",
59);
Subject[] subn3 =
{wangyuEnglish,wangyujisuanji,wangyumath,wangyuyuwen};
alterwangyu.subject =subn3;
Subject alterliuxiong1math =new Subject("01", "数学",
59);
Subject alterliuxiong1English =new Subject("02", "英语",
1);
Subject alterliuxiong1yuwen =new Subject("03", "语文",
59);
Subject alterliuxiong1jisuanji =new Subject("04", "计算机",
59);
Subject[] subn4 =
{liuxiong1English,liuxiong1jisuanji,liuxiong1math,liuxiong1yuwen};
alterliuxiong1.subject =subn4;
Scanner scanner =new Scanner(System.in);
IStudentOperator admin =new Administrator();
IStudentOperator teacher =new Teacher();
System.out.println("请输入角色");
System.out.println("0管理员\t1老师");
int role = scanner.nextInt();
if(role==0){
admin =new Administrator();
}else if(role==1){
teacher =new Teacher();
}else{
System.out.println("无该角色");
return;
}
System.out.print("请输入要执行的操作");
System.out.println("0：通过名字查询成绩\t1：通过学号查询成绩\t2:通过id修改姓名\t3：通过姓名修改成绩\t4：通过姓名删除成绩");
int type = scanner.nextInt();
switch (type) {
case 0:
admin.searchScoreByStudentName(scanner,yiBan);
break;
case 1:
admin.sSBySNO(scanner,yiBanSNO);
break;
case 2:
admin.sSByAlter(scanner,yiBanAlter);
break;
case 3:
break;
default:
System.out.println("抱歉！该功能正在制作中");
break;
}
}
解析：这种问题的难点在于如何建立唯一属性和其他属性的关系（数据库中的主码和非主码的关系）
加载中，请稍候......
加载中…
喜欢