java成绩管理系统
public class Test04
{
public static List<Students> list = new ArrayList<Students>();
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
int t;
while(true){
System.out.println("学生成绩管理系统");
System.out.println("1.输入记录");
System.out.println("2.输出所有记录");
System.out.println("3.按平均成绩排序并输出");
System.out.println("4.查找记录");
System.out.println("5.统计个分数段人数");
System.out.println("6.删除记录");
System.out.println("7.退出");
System.out.println("请输入你的操作(1-7):");
String s = scan.nextLine();
if (null==s||"".equals(s))
{
continue;
}else {
t = Integer.parseInt(s);
}
if (0==t)
{
break;
}
}
}
}
class Students{
int id;
String name;
}
后面可以自己做判断，写方法实现
❷ java编写学生成绩管理系统
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class Admin {
public static void main(String[] args) throws IOException, ClassNotFoundException {
Scanner in = new Scanner(System.in);
int studentNum = 5;
List<Student> result = new ArrayList<Student>();
for (int i = 0; i < studentNum; i++) {
Student bean = new Student();
System.out.print("输入第" + (i + 1) + "个学生学号:");
bean.setNo(in.next());
System.out.print("输入第" + (i + 1) + "个学生姓名:");
bean.setName(in.next());
System.out.print("输入第" + (i + 1) + "个学生数学成绩:");
bean.setShuxue(in.nextDouble());
System.out.print("输入第" + (i + 1) + "个学生语文成绩:");
bean.setYuwen(in.nextDouble());
result.add(bean);
}
while (true) {
System.out.println("1.保存到文件;2.总成绩;3.平均成绩;4.不及格比例;5.及格比例;6,优良比例;0.退出.");
int i = in.nextInt();
if (i == 0) {
System.exit(0);
}
if (i == 1) {
save(result);
}
if (i == 2) {
for (int j = 0; j < result.size(); j++) {
Student s = result.get(j);
System.out.println("学生" + s.getName() + "的总成绩是:" + s.all());
}
}
if (i == 3) {
int jigeSum = 0;
for (int j = 0; j < result.size(); j++) {
Student s = result.get(j);
if (!s.isJige()) {
jigeSum++;
}
}
System.out.println("不及格比例:" + jigeSum + "/" + result.size());
}
if (i == 4) {
// 篇幅受限,自行开发
}
if (i == 5) {
// 篇幅受限,自行开发
}
}
}
private static void save(List result) throws IOException {
FileOutputStream fs = new FileOutputStream("d:/a.txt");
ObjectOutputStream os = new ObjectOutputStream(fs);
os.writeObject(result);
os.flush();
os.close();
fs.close();
}
}
class Student implements Serializable {
private String no;
private String name;
private double shuxue;
private double yuwen;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public double getShuxue() {
return shuxue;
}
public void setShuxue(double shuxue) {
this.shuxue = shuxue;
}
public double getYuwen() {
return yuwen;
}
public void setYuwen(double yuwen) {
this.yuwen = yuwen;
}
public double all() {
return shuxue + yuwen;
}
public double avg() {
return all() / 2;
}
public boolean isJige() {
return avg() > 60;
}
}
❸ java设计一个学生成绩管理系统
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
String exit="";
Map<String, List<Float>> map1=new HashMap();
while(!exit.equals("exit")) {
System.out.println("请出入学生姓名");
List<Float> list = new ArrayList<Float>();
map1.put(sc.next(), list);
for(int i=0;i<3;i++) {
System.out.println("请出入学生成绩");
list.add(sc.nextFloat());
}
System.out.println("输入 exit 退出成绩录入,其他则继续录入");
exit=sc.next();
}
for(String key :map1.keySet()) {
List<Float> list =map1.get(key);
float avage =0l;
for(Float box :list) {
avage += box;
}
System.out.println(key+"的平均成绩："+ avage/list.size());
}
}
//只做了第一题，追加分数，可得第二题答案
❹ JAVA程序设计 学生成绩管理系统（数据库版）
那个不好意思,我来当坏人吧,没人会鸟你的,这世界好人没人想的那么多,最简单的自己在网络搜一个,但是一般数据库或者jdk版本会不兼容,还有你的悬赏太少了,根本没有人会来回答的,我建议你还自己堆起来吧,这个不难,只是堆代码而已,现在eclipse都可以拖放swing部件了
❺ 用java做一个学生成绩管理系统需要哪些技术
用java做一个学生成绩管理系统，可以用到如下技术：
后台：SSH框架，不用框架的话，单纯地用JSP + Servlet也可以。
前台：html + css + js + jquery
数据库：掌握sql语言的编写，数据库的连接。复杂的项目还需要用到存储过程。
❻ 求用Java编写的学生成绩管理系统的完整代码
packagejdbcproj;
importjava.sql.*;
importjava.awt.BorderLayout;
importjava.awt.EventQueue;
importjavax.swing.JFrame;
importjavax.swing.JPanel;
importjavax.swing.border.EmptyBorder;
importjavax.swing.JLabel;
importjavax.swing.JOptionPane;
importjavax.swing.JTextField;
importjavax.swing.JButton;
importjava.awt.event.ActionListener;
importjava.sql.Connection;
importjava.sql.PreparedStatement;
importjava.sql.SQLException;
importjava.awt.event.ActionEvent;
{
privateJPanelcontentPane;
privateJTextFieldtxtname;
privateJTextFieldtxtpassword;
/**
*Launchtheapplication.
*/
publicstaticvoidmain(String[]args){
EventQueue.invokeLater(newRunnable(){
publicvoidrun(){
try{
MainFrameframe=newMainFrame();
frame.setVisible(true);
}catch(Exceptione){
e.printStackTrace();
}
}
});
}
/**
*Createtheframe.
*/
publicMainFrame(){
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100,100,661,399);
contentPane=newJPanel();
contentPane.setBorder(newEmptyBorder(5,5,5,5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabellblNewLabel=newJLabel("u7528u6237u540D");
lblNewLabel.setBounds(114,51,72,18);
contentPane.add(lblNewLabel);
JLabellblNewLabel_1=newJLabel("u5BC6u7801");
lblNewLabel_1.setBounds(114,106,72,18);
contentPane.add(lblNewLabel_1);
txtname=newJTextField();
txtname.setBounds(261,48,86,24);
contentPane.add(txtname);
txtname.setColumns(10);
txtpassword=newJTextField();
txtpassword.setBounds(261,103,86,24);
contentPane.add(txtpassword);
txtpassword.setColumns(10);
JButtonbtnadd=newJButton("u589Eu52A0");
btnadd.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
if(txtname.getText().equals("")||txtpassword.getText().equals(""))
{
JOptionPane.showMessageDialog(getContentPane(),"用户名和密码不能为空","提示信息框",JOptionPane.WARNING_MESSAGE);
}
else{
Usersu=newUsers();
u.setPwd(txtpassword.getText());
u.setUsername(txtname.getText());
UserDAOusdo=newUserDAO();
usdo.addUser(u);
}
}
});
btnadd.setBounds(45,205,113,27);
contentPane.add(btnadd);
JButtonbtndelete=newJButton("u5220u9664");
btndelete.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEventarg0){
if(txtname.getText().equals(""))
{
JOptionPane.showMessageDialog(getContentPane(),"用户名不能为空","提示信息框",JOptionPane.WARNING_MESSAGE);
}
else{
UserDAOusdo=newUserDAO();
usdo.delUser(txtname.getText());;
}
}
});
btndelete.setBounds(172,205,113,27);
contentPane.add(btndelete);
JButtonbtnupdate=newJButton("u4FEEu6539");
btnupdate.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
if(txtname.getText().equals("")||txtpassword.getText().equals(""))
{
JOptionPane.showMessageDialog(getContentPane(),"用户名和密码不能为空","提示信息框",JOptionPane.WARNING_MESSAGE);
}
else{
Usersu=newUsers();
u.setPwd(txtpassword.getText());
u.setUsername(txtname.getText());
UserDAOusdo=newUserDAO();
usdo.updateUser(u);;
}
}
});
btnupdate.setBounds(300,205,113,27);
contentPane.add(btnupdate);
JButtonbtnfind=newJButton("u67E5u8BE2");
btnfind.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
if(txtname.getText().equals(""))
{
JOptionPane.showMessageDialog(getContentPane(),"用户名不能为空","提示信息框",JOptionPane.WARNING_MESSAGE);
}
else{
Usersu=newUsers();
UserDAOusdo=newUserDAO();
u=usdo.findUser(txtname.getText(),txtpassword.getText());
if(u!=null){
JOptionPane.showMessageDialog(getContentPane(),"该用户存在！","提示信息框",JOptionPane.WARNING_MESSAGE);
}
else{
JOptionPane.showMessageDialog(getContentPane(),"该用户不存在！","提示信息框",JOptionPane.WARNING_MESSAGE);
}
}
}
});
btnfind.setBounds(427,205,113,27);
contentPane.add(btnfind);
//记得要写这个
setVisible(true);
}
}
❼ JAVA：编写一个学生成绩管理系统。学生的属性包括学号、姓名、年龄等。
classStudent{
Stringname;
Stringid;
intage;
Couse[]course;
}
classCourse{
Stringcoursename;
floatpscourse;
floatqzcourse;
floatsxcourse;
floatqmcourse;
floatzpcourse;
}
这个要写好长时间的，定义几个类；然后实现具体的功能。用数组或者集合来存储学生信息还有成绩信息，最后定义一个测试类。你可以找我私聊，1368270359qq
❽ 基于java设计一个学生成绩管理系统，要求有界面，且有增加，查询，修改，删除，退出功能，代码如何写
import java.awt.Color;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextField;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.SQLException;
import javax.swing.JButton;
public class Stmessege {
Font font = new Font("楷体", Font.BOLD, 18);
private Frame m = new Frame("登陆成功界面");
protected Window f;
public Stmessege() {
m.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent evt) {
m.setVisible(false);
m.dispose();
System.exit(0);
}
});
m.setSize(460, 360);
m.setBackground(Color.green);
m.setLayout(null);
m.setLocationRelativeTo(null);
Label l0 = new Label("管理员信息");
Font font1 = new Font("楷体", Font.BOLD, 32);
l0.setForeground(Color.blue);
l0.setSize(180, 50);
l0.setLocation(150, 30);
l0.setFont(font1);
final Label l1 = new Label("姓名：");
l1.setSize(60, 20);
l1.setLocation(10, 100);
l1.setFont(font);
TextField tf1 = new TextField("黄朋");
tf1.setForeground(Color.blue);
tf1.setBackground(Color.white);
tf1.setSize(50, 20);
tf1.setLocation(70, 100);
final Label l2 = new Label("学号：");
l2.setSize(60, 20);
l2.setLocation(140, 100);
l2.setFont(font);
TextField tf2 = new TextField("111265");
tf2.setForeground(Color.blue);
tf2.setBackground(Color.white);
tf2.setSize(60, 20);
tf2.setLocation(190, 100);
final Label l3 = new Label("性别：");
l3.setSize(60, 20);
l3.setLocation(280, 100);
l3.setFont(font);
TextField tf3 = new TextField("男");
tf3.setForeground(Color.blue);
tf3.setBackground(Color.white);
tf3.setSize(40, 20);
tf3.setLocation(360, 100);
final Label l4 = new Label("班级：");
l4.setSize(60, 20);
l4.setLocation(10, 170);
l4.setFont(font);
TextField tf4 = new TextField("611231");
tf4.setForeground(Color.blue);
tf4.setBackground(Color.white);
tf4.setSize(60, 20);
tf4.setLocation(67, 170);
final Label l5 = new Label("系别：");
l5.setSize(60, 20);
l5.setLocation(140, 170);
l5.setFont(font);
TextField tf5 = new TextField("计算机工程系");
tf5.setForeground(Color.blue);
tf5.setBackground(Color.white);
tf5.setSize(80, 20);
tf5.setLocation(200, 170);
final Label l6 = new Label("成绩：");
l6.setSize(60, 20);
l6.setLocation(280, 170);
l6.setFont(font);
TextField tf6 = new TextField("95");
tf6.setForeground(Color.blue);
tf6.setBackground(Color.white);
tf6.setSize(40, 20);
tf6.setLocation(360, 170);
final Label l7 = new Label("专业：");
l7.setSize(60, 20);
l7.setLocation(10, 230);
l7.setFont(font);
TextField tf7 = new TextField("软件技术");
tf7.setForeground(Color.blue);
tf7.setBackground(Color.white);
tf7.setSize(60, 20);
tf7.setLocation(70, 230);
JButton btn1 = new JButton("添加");
btn1.setForeground(Color.blue);
btn1.setSize(80, 38);
btn1.setLocation(35, 300);
btn1.setFont(font);
btn1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
new 插入();
m.setVisible(true);
}
});
JButton btn2 = new JButton("查询学生学籍信息");
btn2.setForeground(Color.blue);
btn2.setSize(200, 38);
btn2.setLocation(135, 300);
btn2.setFont(font);
btn2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Stmessege1 f;
try {
f = new Stmessege1();
f.Stmessege11();
m.setVisible(true);
} catch (SQLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (ClassNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
JButton btn3 = new JButton("删除");
btn3.setForeground(Color.blue);
btn3.setSize(80, 38);
btn3.setLocation(350, 300);
btn3.setFont(font);
btn3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
new 删除();
//f.setVisible(false);
m.setVisible(true);
}
});
JButton btn4 = new JButton("更新");
btn4.setForeground(Color.blue);
btn4.setSize(80, 38);
btn4.setLocation(200, 230);
btn4.setFont(font);
btn4.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
new 更新();
m.setVisible(true);
}
});
m.add(l0);
m.add(l1);
m.add(tf1);
m.add(l2);
m.add(tf2);
m.add(l3);
m.add(tf3);
m.add(l4);
m.add(tf4);
m.add(l5);
m.add(tf5);
m.add(l6);
m.add(tf6);
m.add(l7);
m.add(tf7);
m.add(btn1);
m.add(btn2);
m.add(btn3);
m.add(btn4);
m.setVisible(true);
}
public static void main(String[] args) {
new Stmessege();
}
}
可以仿照我的做一下，希望采纳，我才一级哦
❾ 如何用Java语言编写学生成绩管理系统
写过一个类似的给了你吧
packagestudent;
importjava.util.Scanner;
publicclassteststudent{
publicstaticvoidmain(Stringargs[]){
System.out.println("************************学生成绩管理系统*********************");
System.out.println("请输入要管理的学生人数:");
Scannersc=newScanner(System.in);
intn=sc.nextInt();
studentMassagestum=newstudentMassage(n);
intflag=1;
while(flag==1){
System.out.println("1.输入学生信息");
System.out.println("2.通过姓名查找学生信息");
System.out.println("3.显示全部学生信息");
System.out.println("4.退出系统");
intop=sc.nextInt();
switch(op){
case1:stum.addStudent(n);
newScanner(System.in).nextLine();
break;
case2:
System.out.println("输入学生姓名：");
Stringname=sc.next();
stum.FindStudent(name);
newScanner(System.in).nextLine();
break;
case3:
stum.showallStudent();
newScanner(System.in).nextLine();
break;
case4:
flag=0;
System.out.println("已退出系统！");
break;
default:
System.out.println("输入有误！");
newScanner(System.in).nextLine();
}
}
}
}
classDate{
intyear;
intmonth;
intday;
/*publicDate(intyear,intmonth,intday){
this.year=year;
this.month=month;
this.day=day;
}
publicDate(){}*/
publicStringshowDate(){
returnyear+"/"+month+"/"+day;
}
}
classstudent{
intid;
Stringname;
Datedate;
floatscore;
publicstudent(){
id=0;
name=null;
date=null;
score=0f;
}
publicvoidshowStudent(){
System.out.println(id+""+name+""+""+date.showDate()+""+score);
}
}
classstudentMassage{
privatestudent[]stu;
privateintflag;
publicstudentMassage(intn){
flag=0;
if(stu==null){
stu=newstudent[n];
for(inti=0;i<n;++i){
stu[i]=newstudent();
}
}
}
publicvoidaddStudent(intn){
flag=1;
Scannersc=newScanner(System.in);
System.out.println("请输入"+n+"个学生信息");
for(inti=0;i<stu.length;++i){
stu[i].date=newDate();
System.out.println("请输入第"+(i+1)+"个学生学号：");
stu[i].id=sc.nextInt();
System.out.println("请输入第"+(i+1)+"个学生姓名：");
stu[i].name=sc.next();
System.out.println("请输入第"+(i+1)+"个学生出生年份：");
stu[i].date.year=sc.nextInt();
System.out.println("请输入第"+(i+1)+"个学生出生月份：");
stu[i].date.month=sc.nextInt();
System.out.println("请输入第"+(i+1)+"个学生出生日期：");
stu[i].date.day=sc.nextInt();
//stu[i].date=newDate(year,month,day);
System.out.println("请输入第"+(i+1)+"个学生分数：");
stu[i].score=sc.nextFloat();
}
}
publicvoidFindStudent(Stringsname){
studentfind=null;
if(flag!=0){
for(inti=0;i<stu.length;++i){
if(sname.equals(stu[i].name))
find=stu[i];
}
if(find==null)
System.out.println("查无此人！");
else
find.showStudent();
}else
System.out.println("没有输入学生信息！");
}
publicvoidshowallStudent(){
System.out.println("所有学生的信息如下：");
System.out.println("学号姓名生日分数");
for(inti=0;i<stu.length;++i){
stu[i].showStudent();
}
}
}
❿ 用java编写一个学生成绩管理系统. //1.学生类 学号 姓名 年龄 语数外三科成绩(三科成绩)
用数组可以，也可以用集合来存储各个同学的成绩。
添加删除等信息简单。
这里有个迷你图书管理系统，类似，我刚写的。你看看之后应该会有思路了。如果用集合utils做的话，也简单，知识用到了集合框架和泛型等机制。
package cn.kgc.sg.MiTuSys;
import java.util.Scanner;
public class MiNiBookSys {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
// 定义书的信息
String[] bookNames = new String[4];
int[] borrowDate = new int[5];
int[] borrowCount = new int[4];
int[] states = new int[4];
// 定义书单信息
String[] bookMeg = new String[5];
bookMeg[0] = "Java开发";
bookMeg[1] = "C#开发";
bookMeg[2] = "C语言开发";
states[2] = 0; // 0:可借阅 1：已借出
// 初始化两个图书借阅记录信息
bookNames[0] = "安徒生童话";
borrowDate[0] = 15;
borrowCount[0] = 4;
states[0] = 0; // 0:可借阅 1：已借出
bookNames[1] = "格林童话";
states[1] = 1; // 0:可借阅 1：已借出
borrowDate[1] = 26;
borrowCount[1] = 9;
// 搭建项目框架
int num = -1;// 定义用户初始输入的数字
do {
System.out.println("*********************欢迎使用图书管理系统**********************");
System.out.println(" 1.新增图书");
System.out.println(" 2.查看图书");
System.out.println(" 3.删除图书");
System.out.println(" 4.图书借阅");
System.out.println(" 5.归还图书");
System.out.println(" 6.退出系统");
System.out.print("请输入您的选择：");
int choose = sc.nextInt();
// 判断输入的选择是否正确
while (choose < 0 || choose > 6) {
System.out.print("输入有误，请重新输入：");
choose = sc.nextInt();
}
// 定义一个flag变量，来定义是否退出系统
boolean flag = true;// true:不退出系统 false:退出系统
String addName = null;
switch (choose) {
case 1:
System.out.println(" *********1.新增图书*********");
boolean isAdd = true;
System.out.println("序号 图书书名");
for (int i = 0; i < bookMeg.length; i++) {
// 判断为空的不输出
if (bookMeg[i] != null) {
System.out.println((i + 1) + " " + bookMeg[i]);
}
}
System.out.print("请输入新增图书名称：");
addName = sc.next();
for (int i = 0; i <bookMeg.length; i++) {
// 判断为空的不输出
if (bookMeg[i] == null) {
bookMeg[i] = addName;
break;
}
}
/*bookMeg[bookMeg.length-1] = addName; //添加图书信息
*/ System.out.println(" 序号 图书书名");
for (int i = 0; i < bookMeg.length; i++) {
// 判断为空的不输出
if (bookMeg[i] != null) {
System.out.println((i + 1) + " " + bookMeg[i]);
}
}
if (!isAdd) {
System.out.println("对不起，图书已满，不能添加！！!");
}
break;
case 2:
System.out.println(" *********2.查看图书*********");
System.out.println("序号" + " 图书书名" + " 借阅次数 借阅状态 借阅日期 ");
// 遍历数组
for (int i = 0; i < bookNames.length; i++) {
// 判断信息为空的不输出
if (bookNames[i] != null) {
String borrowCounts = borrowCount[i] + "次";
String borrowDates = borrowDate[i] + "日";
String state = (states[i] == 0) ? "可借阅" : "已借出";
System.out.println((i + 1) + " " + bookNames[i] + " " + borrowCounts + " " + state
+ " " + borrowDates);
}
}
break;
case 3:
System.out.println(" *********3.删除图书*********");
System.out.println("序号 图书书名");
for (int i = 0; i < bookMeg.length; i++) {
// 判断为空的不输出
if (bookMeg[i] != null) {
System.out.println((i + 1) + " " + bookMeg[i]);
}
}
System.out.print("请输入删除的图书序号：");
int delNo = sc.nextInt();
// 判断输入的序号是否有误
while (delNo < 1 || delNo > bookMeg.length) {
System.out.print("输入有误，重新输入：");
delNo = sc.nextInt();
}
// 删除图书
for (int i = 0; i <=bookMeg.length-1;i++) {
if (bookMeg[i] != null && i == delNo - 1) {
bookMeg[i] = bookMeg[i+1];
bookMeg[i+1] = null; //
// 最后置空
bookMeg[bookMeg.length - 1] = null;
}
}
for (int i = 0; i < bookMeg.length; i++) {
// 判断为空的不输出
if (bookMeg[i] != null) {
System.out.println((i + 1) + " " + bookMeg[i]);
}
}
break;
case 4:
System.out.println(" *********4.图书借阅*********");
System.out.println(" 序号 图书书名 借阅状态 借阅次数 借阅日期");
for (int i = 0; i < bookMeg.length; i++) {
// 判断为空的不输出
if (bookMeg[i] != null) {
String state = (states[i] == 0) ? "可借阅" : "已借出";
String borrowCi = borrowCount[i] + "次";
System.out.println((i + 1) + " " + bookMeg[i] + " " + state + " " + borrowCi + " "
+ borrowDate[i]);
}
}
System.out.print("请输入您要借阅的图书序号：");
int borrowNo = sc.nextInt();
boolean isFind = true;// false：找不到
for (int i = 0; i < bookMeg.length; i++) {
// 查到了，但是状态是0可借阅，可以借阅
if (i == borrowNo - 1 && states[i] == 0) {
isFind = true;
// 改变状态为已借出
states[i] = 1;
// 借阅次数加一
borrowCount[i]++;
// 输入借阅日期
System.out.print("请输入借阅日期：");
int borrow = sc.nextInt();
// 对输入的日期判断
while (borrow < 1 || borrow > 31) {
System.out.print("您输入日期有误，请重新输入：");
borrow = sc.nextInt();
}
// 更新借阅日期
borrowDate[i] = borrow;
} else if (i == borrowNo - 1 && states[i] == 1) {
// 查到了，但是状态是1已借出，不可以借阅
isFind = true;
System.out.println("状态是已借出，不可以借阅！！！");
}
}
if (!isFind) {
System.out.println("找不到图书！");
break;
}
break;
case 5:
System.out.println(" *********5.归还图书*********");
System.out.println(" 序号 图书书名 借阅状态 借阅次数 借阅日期");
for (int i = 0; i < bookMeg.length; i++) {
// 判断为空的不输出
if (bookMeg[i] != null) {
String state = (states[i] == 0) ? "可借阅" : "已借出";
String borrowCi = borrowCount[i] + "次";
System.out.println((i + 1) + " " + bookMeg[i] + " " + state + " " + borrowCi + " "
+ borrowDate[i]);
}
}
System.out.print("请输入您要归还的图书序号：");
int huanNo = sc.nextInt();
// 判断归还的序号是否合法
while (huanNo < 1 || huanNo > bookMeg.length - 1) {
System.out.print("输入的归还图书序号有误，请重新输入：");
huanNo = sc.nextInt();
}
boolean isHuan = true;// false：找不到
for (int i = 0; i < bookMeg.length; i++) {
// 查到了，但是状态是1已借出，可以还
if (i == huanNo - 1 && states[i] == 1) {
isHuan = true;
// 改变状态为已借出
states[i] = 0;
// 输入归还日期
System.out.print("请输入归还日期：");
int huan = sc.nextInt();
// 对归还的日期判断，必须大于借阅日期
while (huan < 1 || huan > 31) {
System.out.print("您输入日期有误，请重新输入(1-31)：");
huan = sc.nextInt();
}
while (huan < borrowDate[i]) {
System.out.print("归还日期必须大于借阅日期" + borrowDate[i] + "号，请重新输入：");
huan = sc.nextInt();
}
borrowCount[i]++;
System.out.println("归还图书成功！！！");
} else if (i == huanNo - 1 && states[i] == 0) {
// 查到了，但是状态是0可借阅，不能还
isFind = true;
System.out.println("状态是可借阅，不可以归还！！！");
}
}
if (!isHuan) {
System.out.println("抱歉，找不到图书,不能归还图书！");
break;
}
break;
case 6:
System.out.println(" *********6.退出系统*********");
flag = false;
break;
default:
flag = false;
break;
}
if (flag) {
System.out.print("输入0返回：");
num = sc.nextInt();
} else {
break;
}
} while (num == 0);
System.out.println("**********谢谢使用**********");
}
}
希望能帮到你！！！