学生类
package com.neuedu.chapter3_0318practice;
public class Student {
private int stuid;
private String name;
public Student() {}
public Student(int stuid, String name) {
super();
this.stuid = stuid;
this.name = name;
}
public int getStuid() {
return stuid;
}
public void setStuid(int stuid) {
this.stuid = stuid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
班级类
package com.neuedu.chapter3_0318practice;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class Java2 {
// 学员名单 -- Java2班中有哪些学员
private List<Student> stuList = new ArrayList<>();
// 打卡信息名单
private Map<String, List<SignInfo>> signMap = new HashMap<>();
/**
* 添加学员
*
*/
public void addStu(Student s) {
if(stuList != null) {
stuList.add(s);
System.out.println("添加一名学员成功");
}
}
/**
* 查找学员
* @param stuid 学员的id
* @return 对应id的学员对象，如果不存在返回null
*/
public Student findStu(int stuid) {
if(stuList != null) {
for(Student stu :stuList) {
if(stu.getStuid() == stuid) {
return stu;
}
}
}return null;
}
public Map<String, List<SignInfo>> getSignMap() {
return signMap;
}
public void setSignMap(Map<String, List<SignInfo>> signMap) {
this.signMap = signMap;
}
}
签到属性类
package com.neuedu.chapter3_0318practice;
import java.util.Date;
/**
* 打卡信息类：每一个对象代表一个打卡记录
* @author Administrator
*
*/
public class SignInfo {
private int stuid;// 打卡学员的学号
private Date sign_in;// 签到时间
private Date sign_out;// 签退时间
public SignInfo() {}
public SignInfo(int stuid, Date sign_in, Date sign_out) {
super();
this.stuid = stuid;
this.sign_in = sign_in;
this.sign_out = sign_out;
}
public int getStuid() {
return stuid;
}
public void setStuid(int stuid) {
this.stuid = stuid;
}
public Date getSign_in() {
return sign_in;
}
public void setSign_in(Date sign_in) {
this.sign_in = sign_in;
}
public Date getSign_out() {
return sign_out;
}
public void setSign_out(Date sign_out) {
this.sign_out = sign_out;
}
}
主程序类
package com.neuedu.chapter3_0318practice;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map.Entry;
import java.util.Scanner;
public class Test {
static Java2 ban = new Java2();
static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
static SimpleDateFormat sdf2 = new SimpleDateFormat("HH:mm:ss");
/**
* 签到
* @param stuid 学员id
*/
public static void signIn(int stuid) {
// private List<Student> stuList = new ArrayList<>();
//private Map<String, List<SignInfo>> signMap = new HashMap<>();
Date date = new Date();
String date1 = sdf.format(date);
Student student = ban.findStu(stuid);
if(student == null) {
System.out.println("抱歉，没有学号为："+stuid+"的学员");
}else {
// 存在该学号学员
// 判断是否是当天第一个打卡的学员
// 1、第一个打卡
if(ban.getSignMap().containsKey(date1)) {
List<SignInfo> list =ban.getSignMap().get(date1);
// 判断是否有自己的打卡信息
for(SignInfo sinfo: list) {
if(sinfo.getStuid() == stuid) {
System.out.println("您今天"+sdf2.format(sinfo.getSign_in())+"已经打过卡了");
return;
}
}
// 将打卡信息存入list
SignInfo info = new SignInfo();
info.setStuid(stuid);
info.setSign_in(date);
list.add(info);
}else{
List<SignInfo> list = new ArrayList<>();
SignInfo info = new SignInfo();
info.setStuid(stuid);
info.setSign_in(date);
list.add(info);
// 将当天list存入map
ban.getSignMap().put(date1,list);
}
System.out.println("打卡成功");
}
}
public static void signOut(int stuid) {
Date date = new Date();
String date1 = sdf.format(date);
Student student = ban.findStu(stuid);
if(student == null) {
System.out.println("抱歉，没有学号为："+stuid+"的学员");
}else {
if(ban.getSignMap().containsKey(date1) == false) {
System.out.println("你还没签到请签到");
}else {
for(SignInfo info: ban.getSignMap().get(date1)) {
if(info.getStuid() == stuid && info.getSign_out() == null ) {
info.setSign_out(date);
String date2 = sdf2.format(info.getSign_out());
System.out.println("您在："+date2+"时间签退");
}else {
System.out.println("今天您没有签到或您已经签退了");
}
}
}
}
}
public static void showSignInfo() {
if(ban.getSignMap() != null) {
for(Entry<String, List<SignInfo>> entry : ban.getSignMap().entrySet() ) {
System.out.println(entry.getKey()+"打卡信息如下：");
List<SignInfo> list = entry.getValue();
for(SignInfo info : list) {
System.out.println(info.getStuid()+"学号学员，签到时间为"+sdf2.format(info.getSign_in()));
try {
System.out.println(info.getStuid()+"学号学员，签退时间为"+sdf2.format(info.getSign_out()));
} catch (Exception e) {
System.out.println(info.getStuid()+"学号学员,暂未签退");
}
}
}
}
}
public static void main(String[] args) {
Student stu1 = new Student(1001,"张三");
Student stu2 = new Student(1002,"李四");
Student stu3 = new Student(1003,"王五");
Student stu4 = new Student(1004,"赵六");
Student stu5 = new Student(1005,"田七");
ban.addStu(stu1);
ban.addStu(stu2);
ban.addStu(stu3);
ban.addStu(stu4);
ban.addStu(stu5);
int stuid = -1;
while(true) {
System.out.println("Java2班控制台打卡");
System.out.println("**************");
System.out.println("1、签到");
System.out.println("2、签退");
System.out.println("3、查看打卡信息");
System.out.println("4、退出");
Scanner scan = new Scanner(System.in);
String str = scan.nextLine();
switch(str) {
case"1":
System.out.println("请输入您的学号");
stuid = scan.nextInt();
signIn(stuid);
break;
case"2":
System.out.println("请输入您的学号");
stuid = scan.nextInt();
signOut(stuid);
break;
case"3":
showSignInfo();
break;
case"4":
System.out.println("再见");
return;
default:
System.out.println("请重新输入");
}
}
}
}
